SU\G(𝔸)/K·U
Sign Up for free Log In
Engineering › Civil and Structural Engineering

Innovative concrete reinforcement materials

Works Count: 54371

Description

This cluster of papers focuses on the use of fiber reinforced concrete in civil engineering, particularly exploring mechanical properties, ultra-high performance concrete, recycled materials, artificial neural networks for prediction, durability, polymer-modified mortars, waste tire rubber as aggregate, and the use of steel fibers in concrete. It also covers topics such as self-compacting concrete and the utilization of various recycled and waste materials in concrete production.

Keywords

Fiber Reinforced Concrete; Mechanical Properties; Ultra-High Performance Concrete; Recycled Materials; Artificial Neural Networks; Durability; Polymer-modified Mortars; Waste Tire Rubber; Steel Fibers; Self-Compacting Concrete

Fiber-reinforced cement composites

1993-01-01
P. Balaguru , S. P. Shah
Historical developments mechanics of fibers basic concepts of mechanical properties - tension, bending constitutive materials mixture proportions - mixing and casting procedures properties of freshly mixed FRC properties of hardened … Historical developments mechanics of fibers basic concepts of mechanical properties - tension, bending constitutive materials mixture proportions - mixing and casting procedures properties of freshly mixed FRC properties of hardened FRC compression, tension and flexure FRC under impact and fatigue loading creep, shrinkage and long-term performance of FRC plastic drying shrinkage fiber-reinforced shotcrete glass fiber reinforced cement (GFRF) thin sheet products slurry infiltrated fiber concrete (SIFCON) use of FRC in structural components field performance and case studies.

Fibre Reinforced Cementitious Composites

2006-11-16
A. Bentur , Sidney Mindess
Advanced cementitious composites can be designed to have outstanding combinations of strength (five to ten times that of conventional concrete) and energy absorption capacity (up to 1000 times that of … Advanced cementitious composites can be designed to have outstanding combinations of strength (five to ten times that of conventional concrete) and energy absorption capacity (up to 1000 times that of plain concrete). This second edition brings together in one volume the latest research developments in this rapidly expanding area. The book is split

Studies of the Physical Properties of Hardened Portland Cement Paste

1946-01-01
T. C. Powers , T. L. Brownyard
First Name is required invalid characters Last Name is required invalid characters Email Address is required Invalid Email Address Invalid Email Address First Name is required invalid characters Last Name is required invalid characters Email Address is required Invalid Email Address Invalid Email Address

The properties of rubberized concretes

1995-02-01
İlker Bekir Topçu

Influence of polypropylene fiber geometry on plastic shrinkage cracking in concrete

2006-03-10
Nemkumar Banthia , Rishi Gupta

Properties of concrete containing scrap-tire rubber – an overview

2004-01-01
Rafat Siddique , Tarun R. Naik

On Engineered Cementitious Composites (ECC)

2003-01-01
Victor C. Li
This article surveys the research and development of Engineered Cementitious Composites (ECC) over the last decade since its invention in the early 1990's. The importance of micromechanics in the materials … This article surveys the research and development of Engineered Cementitious Composites (ECC) over the last decade since its invention in the early 1990's. The importance of micromechanics in the materials design strategy is emphasized. Observations of unique characteristics of ECC based on a broad range of theoretical and experimental research are examined. The advantageous use of ECC in certain categories of structural, and repair and retrofit applications is reviewed. While reflecting on past advances, future challenges for continued development and deployment of ECC are noted. This article is based on a keynote address given at the International Workshop on Ductile Fiber Reinforced Cementitious Composites (DFRCC) - Applications and Evaluations, sponsored by the Japan Concrete Institute, and held in October 2002 at Takayama, Japan.
View PDF Chat

Abrasion resistance of concrete containing nano-particles for pavement

2005-10-11
Hui Li , Maohua Zhang , Jinping Ou

Recycling of waste tire rubber in asphalt and portland cement concrete: An overview

2013-12-02
Xiang Shu , Baoshan Huang

Experimental study on the mechanical properties and microstructure of chopped basalt fibre reinforced concrete

2014-02-03
Chaohua Jiang , Ke Fan , Fei Wu +1 more

Mechanical properties of concrete containing a high volume of tire–rubber particles

2008-03-27
Ali Khaloo , Mehdi Dehestani , Payman Rahmatabadi

Fibre reinforced concrete: new design perspectives

2009-09-09
Marco di Prisco , Giovanni Plizzari , Lucie Vandewalle

Scrap-tyre-rubber replacement for aggregate and filler in concrete

2008-11-09
Eshmaiel Ganjian , Morteza Khorami , Ali Akbar Maghsoudi
View PDF Chat

Strength properties of nylon- and polypropylene-fiber-reinforced concretes

2004-12-16
P.S. Song , S. Hwang , B.C. Sheu

Use of tire rubber particles as addition to cement paste

2000-09-01
N Segre , Inês Joekes

Effects of waste PET bottles aggregate on the properties of concrete

2004-06-23
Yun-Wang Choi , Dae-Joong Moon , Jee-Seung Chung +1 more

Use of waste plastic in concrete mixture as aggregate replacement

2007-11-14
Zainab Z. Ismail , Enas A. AL-Hashmi

Properties of strain hardening ultra high performance fiber reinforced concrete (UHP-FRC) under direct tensile loading

2014-01-13
Kay Wille , Sherif El‐Tawil , Antoine E. Naaman

Mechanical properties of high-strength steel fiber-reinforced concrete

2004-06-21
P.S. Song , S. Hwang

Polymer-based admixtures

1998-01-01
Yoshihiko Ohama

Rubberized Portland Cement Concrete

1999-08-01
Zaher Khatib , Fouad Bayomy
The use of recycled tire rubber in a portland cement concrete (PCC) mixture is investigated as a possible alternative for nonconventional PCC mixtures. This study is focused on the determination … The use of recycled tire rubber in a portland cement concrete (PCC) mixture is investigated as a possible alternative for nonconventional PCC mixtures. This study is focused on the determination of the practicality of producing such mixes and evaluating their engineering properties. An experimental program was developed to use two types of tire rubber (fine crumb rubber and coarse tire chips) in PCC mixtures. A control PCC mix is designed using American Concrete Institute mix design methods, and three groups of rubberized PCC mixes were developed by partially replacing the aggregate with rubber. Eight tire rubber contents were used in each group. Mixes were tested in compressive and flexural strength in accordance to ASTM standards. Results show that rubberized PCC mixes can be made and are workable to a certain degree with the tire rubber content being as much as 57% of the total aggregate volume. However, strength results show that large reductions in strength would prohibit the use of such a high rubber content. It is suggested that rubber contents should not exceed 20% of the total aggregate volume. A characteristic function that quantifies the reduction in strength for rubberized concrete mixes was developed that could be useful for mix design purposes. Rubberized concrete mixes may be suitable for nonstructural purposes such as lightweight concrete walls, building facades, and architectural units. They could also be used as cement aggregate bases under flexible pavements. Fire hazards are of major concern and need to be thoroughly investigated before recommendations for practical implementation are drawn.

Self-Compacting Concrete

2003-01-01
Hajime Okamura , Masahiro Ouchi
Self-compacting concrete was first developed in 1988 to achieve durable concrete structures. Since then, various investigations have been carried out and this type of concrete has been used in practical … Self-compacting concrete was first developed in 1988 to achieve durable concrete structures. Since then, various investigations have been carried out and this type of concrete has been used in practical structures in Japan, mainly by large construction companies. Investigations for establishing a rational mix-design method and self-compactability testing methods have been carried out from the viewpoint of making self-compacting concrete a standard concrete.
View PDF Chat

Mechanical properties of hybrid fiber-reinforced concrete at low fiber volume fraction

2002-12-02
Wu Yao , Jie Li , Keru Wu

Fiber-reinforced concrete: an overview after 30 years of development

1997-01-01
Ronald F. Zollo
This paper presents a rhetorical discussion on the subject of fiber-reinforced concrete, FRC. It is intended as an overview of the types of commercially available FRCs and how they work. … This paper presents a rhetorical discussion on the subject of fiber-reinforced concrete, FRC. It is intended as an overview of the types of commercially available FRCs and how they work. It discusses commonly applied terminology and models of mechanical behavior that form a basis for understanding material performance without presenting mathematical details. Historical review is intended to help build a background for what is currently understood about FRC rather than as historical reporting. References from both early and contemporary authors are included as a means of tying the subject together along a time line.

Tensile behavior of Ultra High Performance Hybrid Fiber Reinforced Concrete

2011-09-13
Seung Hun Park , Dong Joo Kim , Gum Sung Ryu +1 more

Mix design and properties assessment of Ultra-High Performance Fibre Reinforced Concrete (UHPFRC)

2013-11-26
Rui Yu , PR Przemek Spiesz , H.J.H. Brouwers

Use of plastic waste as aggregate in cement mortar and concrete preparation: A review

2012-04-05
Nabajyoti Saikia , Jorge de Brito

Development of the mechanical properties of an Ultra-High Performance Fiber Reinforced Concrete (UHPFRC)

2006-05-06
Katrin Habel , M. Viviani , Emmanuel Denarié +1 more

Fibre reinforced cement-based (FRC) composites after over 40 years of development in building and civil engineering

2008-03-14
Andrzej M. Brandt

Ultra-High Performance Concrete with Compressive Strength Exceeding 150 MPa (22 ksi): A Simpler Way

2011-01-01
Kay Wille , Antoine E. Naaman , Gustavo J. Parra-Montesinos
First Name is required invalid characters Last Name is required invalid characters Email Address is required Invalid Email Address Invalid Email Address First Name is required invalid characters Last Name is required invalid characters Email Address is required Invalid Email Address Invalid Email Address

A comprehensive review on the applications of waste tire rubber in cement concrete

2015-11-11
Blessen Skariah Thomas , Ramesh Chandra Gupta

Effect of aspect ratio and volume fraction of steel fiber on the mechanical properties of SFRC

2006-09-19
Şemsi Yazıcı , Gözde İnan , Volkan Tabak

Composition of reactive powder concretes

1995-10-01
P. Richard , Marcel Cheyrezy

Use of selected waste materials in concrete mixes

2006-11-03
M. Batayneh , Iqbal Marie , Ibrahim Asi

The greening of the concrete industry

2009-01-05
Christian Meyer

Autogenous healing of engineered cementitious composites under wet–dry cycles

2009-03-05
Yingzi Yang , Michael D. Lepech , En‐Hua Yang +1 more

Use of High Volumes of Fly Ash to Improve ECC Mechanical Properties and Material Greenness

2007-01-01
Environmental sustainability considerations are taken into account in this report on high-performance fiber-reinforced cementitious composite (HPFRCC) development. Featuring high tensile ductility with high volumes of fly ash (HVFA) replacement of … Environmental sustainability considerations are taken into account in this report on high-performance fiber-reinforced cementitious composite (HPFRCC) development. Featuring high tensile ductility with high volumes of fly ash (HVFA) replacement of cement (up to 85% by weight), unique HPFRCC members are engineered cementitious composites (ECC). While the material design process sees application of micromechanics in many of its aspects, this study emphasizes how fly ash content alters material microstructure and mechanical properties. While they incorporate high recycled fly ash volumes, HVFA ECCs are shown in experimental results to be able to retain an approximately 2 to 3% long-term tensile ductility. Significantly, there is reduction in both free drying shrinkage and crack width with a fly ash amount increase, though which HVFA ECC structures' long term durability may benefit. That HVFA ECCs' fiber/matrix interface frictional bond increase is responsible for tight crack width is indicated through micromechanics analysis. Use of industrial waste stream material instead of cement reduces environmental impact and achieves more saturated multiple cracking, meaning a robustness improvement is shown in HVFA ECCs.

Mechanical Properties of Steel Fiber-Reinforced Concrete

2007-04-18
Job Thomas , Ananth Ramaswamy
This paper presents the results from an experimental program and an analytical assessment of the influence of addition of fibers on mechanical properties of concrete. Models derived based on the … This paper presents the results from an experimental program and an analytical assessment of the influence of addition of fibers on mechanical properties of concrete. Models derived based on the regression analysis of 60 test data for various mechanical properties of steel fiber-reinforced concrete have been presented. The various strength properties studied are cube and cylinder compressive strength, split tensile strength, modulus of rupture and postcracking performance, modulus of elasticity, Poisson's ratio, and strain corresponding to peak compressive stress. The variables considered are grade of concrete, namely, normal strength (35MPa), moderately high strength (65MPa), and high-strength concrete (85MPa), and the volume fraction of the fiber (Vf=0.0, 0.5, 1.0, and 1.5%). The strength of steel fiber-reinforced concrete predicted using the proposed models have been compared with the test data from the present study and with various other test data reported in the literature. The proposed model predicted the test data quite accurately. The study indicates that the fiber matrix interaction contributes significantly to enhancement of mechanical properties caused by the introduction of fibers, which is at variance with both existing models and formulations based on the law of mixtures.

Effects of steel fiber content and shape on mechanical properties of ultra high performance concrete

2015-11-28
Zemei Wu , Caijun Shi , Wen He +1 more

Use of recycled plastics in concrete: A critical review

2016-03-09
Lei Gu , Togay Ozbakkaloglu

Polymer degradation and stabilisation

1986-01-01
I.C. McNeill

FROM MICROMECHANICS TO STRUCTURAL ENGINEERING

1993-07-21
Victor C. Li
This paper reviews the development of pseudo strain-hardening cement based short fiber composites employing the Performance Driven Design Approach. The micromechanics theory behind the design concept is reviewed, and the … This paper reviews the development of pseudo strain-hardening cement based short fiber composites employing the Performance Driven Design Approach. The micromechanics theory behind the design concept is reviewed, and the unique mechanical properties of the resulting composite are summarized. The translation of material properties to structural properties is demonstrated with the structural response of the Ohno shear beam.
View PDF Chat

High-performance fiber-reinforced concrete: a review

2016-03-30
Vahid Afroughsabet , Luigi Biolzi , Togay Ozbakkaloglu

Mechanical properties of ultra-high-performance fiber-reinforced concrete: A review

2016-08-04
Doo‐Yeol Yoo , Nemkumar Banthia

Final recommendation of RILEM TC 162-TDF: Test and design methods for steel fibre reinforced concrete sigma-epsilon-design method

2003-08-27

State of the Art Report on High-Strength Concrete

1984-01-01
ACI Committee
First Name is required invalid characters Last Name is required invalid characters Email Address is required Invalid Email Address Invalid Email Address First Name is required invalid characters Last Name is required invalid characters Email Address is required Invalid Email Address Invalid Email Address

Machine learning-based compressive strength prediction for concrete: An adaptive boosting approach

2019-09-23
De‐Cheng Feng , Zhentao Liu , Xiaodan Wang +4 more

New development of ultra-high-performance concrete (UHPC)

2021-08-14
Jiang Du , Weina Meng , Kamal H. Khayat +6 more
View PDF Chat

Mechanical and durability properties of high-strength concrete containing steel and polypropylene fibers

2015-07-04
Vahid Afroughsabet , Togay Ozbakkaloglu

Preparation and Properties of Highly Flexible Acrylic–Epoxy Resin with Self-Stratification Waterproof Material for Steel Bridge Decks

2025-06-26
Huiyun Xia , Yong Yue , Xu Li +4 more | Journal of Materials in Civil Engineering

Prediction of concrete compressive strength of carbon fiber reinforced concrete: soft computing models

2025-06-25
Bedar Rauf Hassan , Hawkar Ali Haji , Fkrat Latif Hamid | Innovative Infrastructure Solutions

Influence of Recycled Tire Steel Fibers on the Mechanical Properties and Carbon Emissions of High-Performance Cement-Based Materials

2025-06-25
Liqiang Wu , Feng Cao , Ji Qiu +3 more | Materials
To address the issues of high carbon emissions from concrete and high energy consumption in the manufacturing of traditional steel fibers, this study investigates the feasibility of replacing industrial steel … To address the issues of high carbon emissions from concrete and high energy consumption in the manufacturing of traditional steel fibers, this study investigates the feasibility of replacing industrial steel fibers (ISF) with recycled tire steel fibers (RSF) in high-performance cement-based materials. The study examines the effects of fiber type and dosage on the mechanical properties within the systems of ultra-high-performance concrete (UHPC) and slurry-infiltrated fiber concrete (SIFCON) and analyzes the carbon emission levels using the Life Cycle Assessment (LCA) method. Research results indicate that the compressive and tensile strengths of SIFCON are significantly higher than those of UHPC. Under the same conditions, RSF has little difference in tensile performance when compared with ISF, suggesting a great substitution potential. Carbon emission analysis shows that although the total carbon emissions of the SIFCON system are relatively high, its performance improvement is remarkable. Both the carbon emission per tensile strength and carbon emission per compressive strength are lower than those of UHPC, demonstrating a high degree of environmental friendliness. Overall, this study shows that RSF can not only effectively enhance the performance of high-performance cement-based materials but also reduce carbon emissions, making it a reinforcing material with both excellent performance and sustainability.

Flexural Response of UHPC Beams Produced with Manufactured Sand as Alternatives for Natural River Sand: Experiment and Theory

2025-06-24
Yang Jiao , Jianan Qi , Chen Liu +1 more | International Journal of Civil Engineering

Review on Investigating Concrete Compressive Strength Under Various Curing Conditions

2025-06-24
Vishwajeet S. Kakade | INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT
Investigation of Concrete Compressive Strength under Various Curing Conditions Concrete is a widely used construction material, and its strength is a critical factor in determining the durability and safety of … Investigation of Concrete Compressive Strength under Various Curing Conditions Concrete is a widely used construction material, and its strength is a critical factor in determining the durability and safety of structures. Curing conditions play a significant role in the development of concrete strength. This study investigates the effect of various curing conditions on the compressive strength of concrete cubes. A total of [Number] concrete cubes were cast and subjected to different curing conditions, including [List curing conditions, e.g., water curing, air curing, steam curing, etc.]. The compressive strength of the cubes was tested at [Time intervals, e.g., 7, 28, and 56 days]. The results show that [Briefly mention the key findings, e.g., "water curing resulted in the highest compressive strength, followed by steam curing"]. The study concludes that the curing conditions significantly affect the compressive strength of concrete cubes. The findings of this research can be used to optimize the curing process and improve the durability of concrete structures. Keywords: Compressive Strength, Water Curing, Air Curing, Steam Curing, Durability, Concrete Cubes

An Experimental Investigation on the Mechanical Performance of Engineered Cementitious Composites with Different Types of Steel Fibers

2025-06-24
Mohammad Maldar , Reza Kianoush , Hocine Siad +1 more | Materials
Engineered cementitious composites (ECCs), known for their superior ductility and strain-hardening behavior compared to conventional concrete, have been predominantly studied with polyvinyl alcohol (PVA) fibers. However, the potential economic and … Engineered cementitious composites (ECCs), known for their superior ductility and strain-hardening behavior compared to conventional concrete, have been predominantly studied with polyvinyl alcohol (PVA) fibers. However, the potential economic and technical advantages of incorporating steel fibers into ECCs have been largely overlooked in the literature. This study investigates the mechanical performance of ECC reinforced with different types of steel fibers, including straight, twisted, hooked, and hybrid fibers of different lengths, as compared to PVA. The inclusion of various supplementary cementitious materials (SCMs) such as slag and fly ash with each type of steel fiber was also considered at a constant fiber volume fraction of 2%. The mechanical properties were assessed through compressive strength, splitting tensile strength, and four-point flexural tests along with calculations of toughness, ductility, and energy absorption capacity indices. This study compares the mechanical properties of different ECC compositions, revealing that ECCs with hybrid steel fibers (short and long) achieved more than twice the tensile strength, 12.7% higher toughness, and 36.4% greater energy absorption capacity compared to ECCs with PVA fibers, while exhibiting similar multiple micro-cracking behavior at failure. The findings highlight the importance of fiber type and distribution in enhancing an ECC’s mechanical properties, providing valuable insights for developing more cost-effective and resilient construction.

Investigation of the shear capacity of ultra high-performance fiber reinforced concrete beams using machine learning techniques

2025-06-24
Sandaru Wijesundara , Thanuja Hemachandra , Sahan Bandara +1 more | Structure and Infrastructure Engineering

Correction: Smart construction of fibre‑reinforced concrete structures: size‑scale effects on minimum reinforcement and plastic rotation capacity

2025-06-24
Federico Accornero , Alessio Rubino , Giuseppe Carlo Marano +1 more | Smart Construction and Sustainable Cities

Mechanical Properties of Glass Fiber Reinforced Concrete Using Different Sizes of Glass Fiber

2025-06-24
Inumarthi Prasanna Naga Lakshmi | INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT
- The current study investigates the influence of size of glass fiber on the properties of the concrete. Three different lengths of glass fibers 6 mm, 12mm, 24 mm were … - The current study investigates the influence of size of glass fiber on the properties of the concrete. Three different lengths of glass fibers 6 mm, 12mm, 24 mm were selected and the mechanical properties of the concrete were evaluated in terms of compressive strength, tensile strength and flexural strength and compared with the conventional concrete. This follows the cost analysis of 1m3 of concrete. The results indicates that the addition of glass fibers, particularly the 12mm size, enhances the compressive strength, split tensile strength and flexural strength of the concrete. However, the workability of Glass Fiber Reinforced Concrete (GFRC) is reduced compared to conventional concrete. Further, the cost of GFRC is higher compared with conventional concrete because of inclusion of glass fibers in the concrete. Key Words: Glass fibers, Size, tensile strength, cost

Use of Clay Tile Waste as an Internal Curing Aggregate to Replace Fine Aggregates in Roller Compacted Concrete

2025-06-24
W.R.A.N. Jayantha , Sandali Dilsara , Shanika Ekanayake +1 more | Transportation Research Record Journal of the Transportation Research Board
The construction industry actively seeks sustainable and eco-friendly alternatives, leading to growing interest in integrating waste materials into concrete production. In addition, proper concrete curing is crucial, prompting the industry … The construction industry actively seeks sustainable and eco-friendly alternatives, leading to growing interest in integrating waste materials into concrete production. In addition, proper concrete curing is crucial, prompting the industry to explore alternative methods to address the limitations of conventional curing techniques. The use of internal curing agents, particularly in concrete with a low water/cement ratio, has become widespread. Attention has been directed toward the utilization of waste materials as internal curing agents based on their water absorption and desorption capacities. This study aims to fill a gap in sustainable construction practices by assessing the feasibility of employing clay tile waste as an internal curing aggregate (ICA) to replace fine aggregates in roller-compacted concrete (RCC). This research involves a series of laboratory experiments to evaluate the suitability of clay tile waste as an ICA. Furthermore, the study evaluates the mechanical properties of RCC samples containing clay tile aggregates (CTA) at varying percentages of replacement: 5%, 10%, and 15%. The findings indicate that the 10% replacement yields 18% more 3-day compressive strength than conventionally cured RCC. However, the tensile and flexural strengths of the RCC samples with CTA are lower compared with conventionally cured RCC, highlighting areas for further optimizations.

Transfer learning on stacked machine-learning model for predicting pull-out behavior of steel fibers from concrete

2025-06-24
Torkan Shafighfard , Neda Asgarkhani , Farzin Kazemi +1 more | Engineering Applications of Artificial Intelligence

Predicting dynamic increase factors for post-cracking tensile strength of fiber-reinforced cement composites using novel hybrid machine learning models

2025-06-24
Thanh Duoc Phan , Van Thong Nguyen , Dong Joo Kim | Construction and Building Materials

On the Efficiency of Advanced Machine Learning and Deep Learning Regression Techniques for Predicting the Punching Shear Strength of Reinforced Concrete

2025-06-24
Tarek Teama , Hongbin Ma , Denise‐Penelope N. Kontoni +1 more | Research Square (Research Square)
<title>Abstract</title> Punching shear is a complicated dilemma that is affected by a combination of many variables and several mechanisms. The aim of this research is to investigate the application of … <title>Abstract</title> Punching shear is a complicated dilemma that is affected by a combination of many variables and several mechanisms. The aim of this research is to investigate the application of regression analysis methods in data analysis and prediction. Regression analysis is a powerful statistical technique that enables researchers to model the relationship between a dependent variable and one or more independent variables. In this study, we explore various regression analysis methods, including multiple machine learning and deep learning-based regression algorithms, to predict the punching shear strength of reinforced concrete. We compared the results from the recent state-of-the-art models and our models, and we concluded that the best models for predicting the punching shear were as follows: (1) unsupervised Deep learning Autoencoder with <italic>R</italic><sup>2</sup> score of 0.91; (2) Extreme Gradient Boost Regression with <italic>R</italic><sup>2</sup> score of 0.8959; (3) Decision Tree Regression with <italic>R</italic><sup>2</sup> score of 0.9046; (4) Genetic Algorithm Optimization Random Forest Regression with <italic>R</italic><sup>2</sup> score of 0.9015. After applying the grid search to search for the best hyperparameters to get the best fit for the data and adding it to the genetic algorithm optimization model with the random forest regression model, we found a huge improvement in the prediction accuracy, as the random forest regression model <italic>R</italic><sup>2</sup> score improved from 0.8951 to 0.9015 and with an RMSE from 92.52 to 89.65. The worst models were long short-term memory (LSTM) and support vector regression (SVR) models, both of them showed substantially inferior predictive ability in comparison to other models with <italic>R</italic><sup>2</sup> -0.8282 and 0.7465, respectively.

Constitutive Model for Plain and Steel-Fibre-Reinforced Lightweight Aggregate Concrete Under Direct Tension and Pull-Out

2025-06-23
Hasanain K. Al‐Naimi , Ali A. Abbas | Fibers
In the present study, a programme of experimental investigations was carried out to examine the direct uniaxial tensile (and pull-out) behaviour of plain and fibre-reinforced lightweight aggregate concrete. The lightweight … In the present study, a programme of experimental investigations was carried out to examine the direct uniaxial tensile (and pull-out) behaviour of plain and fibre-reinforced lightweight aggregate concrete. The lightweight aggregates were recycled from fly ash waste, also known as Pulverised Fuel Ash (PFA), which is a by-product of coal-fired electricity power stations. Steel fibres were used with different aspect ratios and hooked ends with single, double and triple bends corresponding to 3D, 4D and 5D types of DRAMIX steel fibres, respectively. Key parameters such as the concrete compressive strength flck, fibre volume fraction Vf, number of bends nb, embedded length LE and inclination angle ϴf were considered. The fibres were added at volume fractions Vf of 1% and 2% to cover the practical range, and a direct tensile test was carried out using a purpose-built pull-out test developed as part of the present study. Thus, the tensile mechanical properties were established, and a generic constitutive tensile stress–crack width σ-ω model for both plain and fibrous lightweight concrete was created and validated against experimental data from the present study and from previous research found in the literature (including RILEM uniaxial tests) involving different types of lightweight aggregates, concrete strengths and steel fibres. It was concluded that the higher the number of bends nb and the higher the volume fraction Vf and concrete strength flck, the stronger the fibre–matrix interfacial bond and thus the more pronounced the enhancement provided by the fibres to the uniaxial tensile residual strength and ductility in the form of work and fracture energy. A fibre optimisation study was also carried out, and design recommendations are provided.

Influence of concrete strength and fiber properties on residual flexural strength of steel fiber-reinforced concrete

2025-06-23
Ai-Hua Jin , Jin-Seok Woo , Hyun-Do Yun +3 more | Construction and Building Materials

Experimental investigation on the mechanical performance and its size effect of ultra-high performance concrete containing coarse aggregate

2025-06-23
Qin Wang , Zhihao Tong , Li Deng +1 more | Archives of Civil and Mechanical Engineering

Research on Thermal Performance of Polypropylene Fiber-Reinforced Concrete Wall Panels

2025-06-23
Zhe Zhang , Yiru Hou , Yi Wang | Buildings
The global construction industry faces pressing challenges in enhancing building energy efficiency standards. To address this critical issue, facilitate worldwide green and low-carbon transformation in construction practices and improve the … The global construction industry faces pressing challenges in enhancing building energy efficiency standards. To address this critical issue, facilitate worldwide green and low-carbon transformation in construction practices and improve the thermal performance of building wall panels to achieve optimal levels, a novel polypropylene fiber-reinforced concrete wall panel has been developed and investigated. A three-dimensional steady-state heat transfer finite element model of the wall panel was established to simulate its thermal performance. Key parameters, including the thickness of the inner and outer concrete layers, insulation layer thickness, connector spacing, and connector arrangement patterns, were analyzed to evaluate the thermal performance of the fiber-reinforced concrete composite sandwich wall panel. The results indicate that the heat transfer coefficients of the G-FCSP and FCSP wall panels were 0.768 W/m2 · K and 0.767 W/m2 · K, respectively, suggesting that the glass fiber grid had a negligible impact on the thermal performance of the panels. The embedded insulation layer was crucial for enhancing the thermal insulation performance of the wall panel, effectively preventing heat exchange between the two sides. Increasing the thickness of the concrete layers had a very limited effect on reducing the heat transfer coefficient. Reducing the spacing of the connectors improved the load-bearing capacity of the composite wall panel to some extent but had minimal influence on the heat transfer coefficient; to achieve optimal performance by balancing structural load distribution and thermal damage resistance, a connector spacing ranging from 200 mm to 500 mm is recommended. The variation in heat transfer coefficients among the four different connector arrangement patterns demonstrated that reducing the thermal conduction media within the wall panel should be prioritized while ensuring mechanical performance. It is also recommended that the connectors are arranged in a continuous layout.

An intelligent framework for compressive strength prediction of eco-friendly SFR-RCAC: Base and stacked ensemble models combined with experimental verification

2025-06-23
Metin Katlav , Mehmet Emin Tabar , Kâzım Türk | Construction and Building Materials

Post-consumer PET bottle resin-based polymer concrete under multi-axial stresses: experiments, analysis and applications

2025-06-23
Husain Abbas , Fareed Mahdi , M. Shariq | European Journal of Environmental and Civil engineering

Sustainable high-strength cement mortar: synergistic of fiber reinforcement and partial aggregate replacement

2025-06-23
Leena Jaffer Sedeeq , Ali Jihad Hamad , Imran Mohsin +2 more | Innovative Infrastructure Solutions

Evaluating the Performance of Buoyancy Fiber-Reinforced Floating Concrete with Recycled LECA

2025-06-23
Ming Kun Yew , Jing Han Beh , Ming Chian Yew +5 more | Key engineering materials
The growing issue of light expanded clay aggregate (LECA) disposal has become a pressing environmental concern globally, underscoring the need for swift and effective solutions. To mitigate this issue, the … The growing issue of light expanded clay aggregate (LECA) disposal has become a pressing environmental concern globally, underscoring the need for swift and effective solutions. To mitigate this issue, the construction industry is increasingly adopting sustainable alternatives to traditional concrete. One such innovative approach involves incorporating these waste materials into construction materials, primarily concrete. This study aimed to create a novel, eco-friendly concrete material utilizing recycled LECA, engineered to float on water. The investigation employed a range of polyvinyl alcohol (PVA) fiber volume fractions (0, 0.15, 0.25, 0.35, and 0.45%) to assess their impact on the strength properties of lightweight foamed concrete (LWFC). The combination of LECA and polyvinyl alcohol (PVA) fibers resulted in compressive strengths ranging from 3.51 to 4.15 MPa, accompanied by densities between 600 and 750 kg/m 3 . Furthermore, ultra-lightweight foam floating concrete (ULWFFC)-P5 demonstrated enhanced load capacity, with a buoyancy force of 26.5 N. This innovation presents a groundbreaking opportunity for the construction sector, offering a sustainable and effective solution for complex projects in building and offshore marine environments.

Comparative Study on Hyperparameter Tuning for Predicting Concrete Compressive Strength

2025-06-22
Jeonghyun Kim , Donwoo Lee | Buildings
This study assesses the impact of hyperparameter optimization algorithms on the performance of machine learning-based concrete compressive strength prediction models. Three datasets were used to compare the performance of a … This study assesses the impact of hyperparameter optimization algorithms on the performance of machine learning-based concrete compressive strength prediction models. Three datasets were used to compare the performance of a basic model that had not undergone hyperparameter optimization, with the model incorporating random search, grid search, and Bayesian optimization. A post-hoc analysis using Shapley additive explanations was also conducted. The results demonstrate that the effectiveness of hyperparameter optimization varies depending on the characteristics of the dataset. For Dataset 1, the application of search algorithms appeared to improve prediction accuracy to some extent. However, for Datasets 2 and 3, the performance improvement from the search algorithms was either insignificant or decreased. Despite these contrasting results, the post-analysis showed that the influence of each feature generally aligned with empirical knowledge across all datasets, suggesting that the Shapley additive explanations method alone may have limitations in pinpointing the causes of model overfitting.

Performance assessment of concrete incorporating waste rubber powder as partial cement replacement

2025-06-22
Naresh Thatikonda , N. R. Dakshina Murthy , Mainak Mallik +1 more | Journal of Building Pathology and Rehabilitation

Experimental and numerical assessment of the flexural behavior of UHPC-NC composite slab with UHPC wet joint

2025-06-22
Dahai Yang , Xiuli Du , Zhitian Wang | Advances in Structural Engineering
In order to study the mechanical performance of the new prefabricated ultra-high performance concrete (UHPC)-normal concrete (NC) composite wet joint slab (NUS slab), four-point bending tests were carried out by … In order to study the mechanical performance of the new prefabricated ultra-high performance concrete (UHPC)-normal concrete (NC) composite wet joint slab (NUS slab), four-point bending tests were carried out by designing and making 3 cast-in-situ slabs of different concrete materials and 1 NUS slab, and numerical modelling technique was conducted by ABAQUS software. The results showed that the main cracks of the cast-in-situ slab were mainly located in the mid-span and the loading point. The main crack of the NUS slab was located at the wet joint interface. The application of UHPC layer and UHPC wet joint improved the flexural capacity of slabs comparing with the cast-in-situ NC slab. Through the finite element simulation and parameter analysis, the width of UHPC wet joint had a certain effect on the improvement of the flexural capacity of NUS slab, but the effect was not obvious. 25 cm UHPC wet joint is suggested as a reference for design. The reinforcement ratio has a great influence on the flexural behavior of NUS slab. When the reinforcement ratio exceeded 4.43%, the flexural shear failure occurred in the precast part of the flexural shear section of NUS slab, while the wet joint part had no great damage, and the flexural capacity was good. When the reinforcement ratio was less than 4.43%, the main damaged area was located between the loading points, and the position of the main crack was at the interface of the wet joint. And the flexural capacity and ductility of NUS with 3.25% reinforcement ratio was found better then cast-in-situ NC slab.

Workability and Mechanical Properties of PVA Fiber-Reinforced Concrete with Hybrid Dune Sand and Steel Slag Aggregates

2025-06-22
Yanhua Liu , Xirui Wang , Senyan Jiang +2 more | Materials
To mitigate ecological damage from excessive natural aggregate extraction, this study developed an eco-friendly concrete using dune sand and steel slag as natural aggregates, enhanced with polyvinyl alcohol (PVA) fibers. … To mitigate ecological damage from excessive natural aggregate extraction, this study developed an eco-friendly concrete using dune sand and steel slag as natural aggregates, enhanced with polyvinyl alcohol (PVA) fibers. Through orthogonal testing, the effects of the dune sand replacement ratio, steel slag replacement ratio, PVA fiber length, and PVA fiber content on concrete workability and mechanical properties were analyzed. The results show that slump exceeded 120 mm (meeting engineering requirements) in mixes except that with 40% dune sand, 60% steel slag, 18 mm PVA fiber length, and 0.4% PVA fiber content; 50% steel slag replacement significantly improved mechanical properties, yielding a 21.2% increase in 28 d compressive strength when replacement increased from 30% to 50%; 20% dune sand replacement for river sand is optimal; and while increased PVA content enhanced splitting tensile and flexural strengths, both its length and content should not exceed 9 mm and 0.3%, respectively. The concrete delivers acceptable performance while providing dual environmental benefits: reduced aggregate consumption pressure and achieved high-value-added dune sand–steel slag utilization.

Crack Propagation of Ceramsite Lightweight Concrete Under Four-Point Bending Fatigue Conditions

2025-06-22
Kai Yang , Shenghan Zhuang , Yongjun Wang +3 more | Materials
The examination of crack propagation in concrete under fatigue conditions is crucial for comprehending the mechanisms of concrete fatigue failure. Variations in aggregate types result in notable differences in the … The examination of crack propagation in concrete under fatigue conditions is crucial for comprehending the mechanisms of concrete fatigue failure. Variations in aggregate types result in notable differences in the fatigue crack propagation characteristics of lightweight concrete compared to ordinary concrete. Consequently, this research focused on analyzing the locations and angles of cracks in ceramsite lightweight concrete subjected to four-point bending fatigue conditions, while accounting for different levels of fatigue loading (i.e., stress levels). Furthermore, the study aimed to clarify the influence of ceramsite size and content on the fatigue crack propagation behavior in ceramsite lightweight concrete. The results indicated that an increase in the replacement rate of 5–10 mm and 10–20 mm ceramsite led to the highest probability of fatigue cracks occurring within the range of 15–45 mm from the specimen center, reaching 41.2% and 44.7%, respectively. The crack angle exhibited an increase corresponding to an increase in the content of 5–10 mm ceramsite, with the maximum average crack angle attaining a value of 86.5°. Conversely, a decrease in the content of 10–20 mm ceramsite resulted in a reduction in the crack angle. However, 20–30 mm ceramsite did not have a significant effect on the characteristics of fatigue cracks. The level of stress predominantly influenced the path of crack propagation. At stress levels of 0.55, 0.65, and 0.75, the highest proportions of crack angles fell within the range of 75° to 80°, with values of 47.1%, 43.8%, and 53.3%, respectively. Furthermore, an increase in stress levels did not affect the location of the cracks.

Experimental and analytical evaluation of mechanical properties of rubberized concrete incorporating waste tire crumb rubber

2025-06-21
Xiaoyan Han , Li Wang , Aijiu Chen +7 more | Case Studies in Construction Materials

Shear capacity of fiber reinforced high-strength lightweight self-consolidating concrete

2025-06-21
Mahmoud El Shazly , Sherif Yehia , Wael Abuzaid +2 more | Engineering Structures

Bending performance analysis and crack width calculation of ultra-high-performance concrete beams

2025-06-21
Yanyan Li , Songtao Wu , Jinli Qiao +2 more | Advances in Structural Engineering
In this study, four-point bending tests were carried out on six ultra-high-performance concrete (UHPC) and three normal concrete (NC) beams. The mechanical performance and development mechanism of cracks in UHPC … In this study, four-point bending tests were carried out on six ultra-high-performance concrete (UHPC) and three normal concrete (NC) beams. The mechanical performance and development mechanism of cracks in UHPC beams were investigated. The concrete type and longitudinal reinforcement ratio were selected as test parameters. The bending capability, vertical deflections, and crack evolution of the beams were evaluated. The results implied that UHPC beams had more fine cracks and exhibited excellent integrity and recoverability owing to the bridge action of steel fibers. The characteristic loads (cracking, yield, and ultimate loads) and ductility of the UHPC beams were superior to those of the NC beams. As the longitudinal reinforcement ratio increased, the crack spacing and crack widths of beams all decreased. Furthermore, an approach to determine the max crack width in UHPC beams was proposed based on the synergistic force and deformation coordination among the reinforcement and UHPC. Formulas for calculating the stress of the reinforcement and crack spacing of UHPC beams were established, considering the tensile behavior of steel fibers in the cracked section. Combined with the test data and the results presented in the literature, the crack widths of these UHPC beams were determined using the proposed formula and the French standard NF P 18-710 (2016), respectively. The model outcomes were all in excellent accordance with the test results.

AI-enhanced reinforced concrete with SCM and AZO nanoparticles for superior mechanical and antibacterial performance

2025-06-21
Amol Shivaji Mali , Shailesh Ghodke , Utkarsh Maheshwari +2 more | Asian Journal of Civil Engineering

Oleic Acid-Influenced Graphene Oxide from Sugarcane Bagasse as Waterproofing Admixture in Rendering Mortar (external wall finishing)

2025-06-20
J. A. Panadero , Haziel Marie P. Baybayon | Mindanao Journal of Science and Technology
This study prepared a hydrophobic rendering mortar using oleic acid-influenced graphene oxide (OA-GO) as an admixture. The graphene oxide (GO) used in this study was synthesized from sugarcane bagasse. Oleic … This study prepared a hydrophobic rendering mortar using oleic acid-influenced graphene oxide (OA-GO) as an admixture. The graphene oxide (GO) used in this study was synthesized from sugarcane bagasse. Oleic Acid (OA) was used as an influencing agent of GO in making the OA-GO admixture. Rendering mortars with GO and OA admixtures were fabricated to differentiate the OA-GO admixture's effects. FT-IR, SEM, and XRD were performed to confirm the synthesized GO from sugarcane bagasse. Hydrophobicity was evaluated through a contact angle test, with subsequent statistical analyses revealing significant disparities among the tested mortars and across varying time intervals. Results showed that the use of OA-GO admixture corresponds to a higher contact angle of 98.50° ± 3.68° and 115.82° ± 10.86° after curing for 7 and 28 days, respectively. Thereby confirming its hydrophobicity among other tested mortars. Also, the compressive strength test results showed an increased compressive strength of the mortar with OA-GO admixture by almost twice, 1.82, that of the mortar with OA alone. It is concluded that the GO used in producing the OA-GO admixture equalizes the downside effect of OA. The results helped understand the effectiveness of sugarcane bagasse as a primary material in making an admixture to create a hydrophobic rendering mortar for external wall finishing.

Application and Analysis of UHPC for Strengthening Different Components of Bridge Structure

2025-06-20
Zhao Xiao | Applied and Computational Engineering
With the increasing traffic load, traditional concrete bridges gradually exhibit issues such as aging, cracking, and insufficient durability. Ultra-high Performance Concrete (UHPC), as a new type of cementitious composite material, … With the increasing traffic load, traditional concrete bridges gradually exhibit issues such as aging, cracking, and insufficient durability. Ultra-high Performance Concrete (UHPC), as a new type of cementitious composite material, has been widely applied in recent years in the construction of new bridges and the reinforcement and maintenance of aging bridges due to its excellent mechanical properties and durability. This paper first introduces the development of UHPC and its material characteristics. By studying relevant literatures and engineering cases, it provides an in-depth analysis of UHPC's specific applications in the reinforcement of bridge decks, main girders, and piers. The results show that UHPC can effectively prevent fatigue cracks in the bridge deck and girder and improve the structural bearing capacity due to its high strength and fatigue resistance. Additionally, the excellent impermeability of UHPC significantly improves the corrosion resistance of main girders and piers, thereby extending the service life of bridges. However, there are still some construction challenges in the practical application of UHPC. As construction technology advances and material costs decrease, UHPC is expected to have a broader application prospect in both bridge reinforcement and new construction projects.

Modeling the response of <scp>UHPC</scp> shear‐critical beams: Integrating nonlinear finite element analysis and artificial neural network

2025-06-20
Amjad Diab , Anca C. Ferche | Structural Concrete
Abstract An analytical framework suited for the analysis of shear‐critical ultra‐high performance concrete (UHPC) members is presented. The numerical methodology utilizes a nonlinear finite element analysis formulation integrated with an … Abstract An analytical framework suited for the analysis of shear‐critical ultra‐high performance concrete (UHPC) members is presented. The numerical methodology utilizes a nonlinear finite element analysis formulation integrated with an artificial neural network (ANN) that characterizes the UHPC tension response based on its mix design. In addition, a novel compression softening model specifically tailored for UHPC is introduced. Both of these behavioral mechanisms are necessary for a realistic assessment of the structural behavior. Special consideration is given to the influence of crack widths and the calculation of crack spacing, specific to UHPC materials. The ANN revealed that the tensile behavior of UHPC is influenced not only by the characteristics of fiber reinforcement but also by the mix design constituents. Validation studies successfully reproduced the response of published experiments on shear‐critical panel specimens and beams. This study also highlights the crucial impact of UHPC direct tension characteristics on the behavior of shear‐critical members. Furthermore, the influence of compression softening on the accuracy of the analytical results was found to be dependent on the magnitude of compressive stresses present.

Precast steel-fiber reinforced concrete (SFRC) on beams: Results from an experimental campaign

2025-06-20
Mario Lucio Puppio , Danilo Di Giacinto , Daniel Meloni +2 more | Engineering Structures

Evaluate the bonding strength performance between lightweight concrete and lightweight engineered cementitious composite using different percentages of cenosphere and hybrid fibers

2025-06-20
Haider M. Al-Baghdadi , Mohammed M. Kadhum , Ali Shubbar | Journal of Building Pathology and Rehabilitation
Abstract The objective of this research is to investigate the bond performance of high-strength lightweight concrete (HLWC) substrate and lightweight engineered cementitious composites (LECC) used as overlay repair materials with … Abstract The objective of this research is to investigate the bond performance of high-strength lightweight concrete (HLWC) substrate and lightweight engineered cementitious composites (LECC) used as overlay repair materials with varying amounts (0%, 30%, 70%, and 90%) of fly ash cenosphere (FAC) as a replacement of sand with different surface roughness conditions (as-cast surface and grooved surface). In the preparation of the LECC mixtures, a novel combination of polyvinyl alcohol (PVA) and glass fibers (GF) was used. Mechanical properties such as compressive strength, flexural strength, and density of the HLWC and LECC were tested. Additionally, the bond strength at the interface between the HLWC substrate and the LECC was evaluated by conducting both the slant shear test and the direct shear test (bi-surface) at the age of 28 days. Results indicated that replacing the sand with 70% FAC reduced the density of the LECC by about 35% and improved the specific strength ratio by about 8.6% relative to the mixture with 0% FAC. Results also showed that for both tests (slant shear and bi-surface shear), maximum bond strength was recorded for the grooved surface. For the grooved surface under the slant shear test, replacing the sand with 30% and 70% FAC provided a bond strength of 21.85 MPa and 18.35 MPa, respectively. For bi-surface shear, replacing the sand with 30% and 70% FAC showed a bond strength of 13.85 MPa and 10.3 MPa, respectively. This research reported on the production of a repair material with comparable strength, a high specific strength ratio, and an outstanding strength-to-weight reduction ratio, making it the perfect option for repair applications where durability and load-bearing capability are essential.

Evaluating The Co-Relationship Between the Mechanical Properties of Steel Slag Aggregate Concrete Reinforced with Steel Fiber

2025-06-20
Nihar Ranjan Mohanta , Meena Murmu | Engineering Research Express
Abstract The growing need to conserve natural resources, effective management of industrial waste, and minimization of environmental pollution has encouraged the use of industrial waste as a sustainable construction material. … Abstract The growing need to conserve natural resources, effective management of industrial waste, and minimization of environmental pollution has encouraged the use of industrial waste as a sustainable construction material. Furthermore, in light of the rising scarcity of natural coarse aggregates (NCA) in many regions, it has become essential to identify viable alternatives. Hence, this study explored the effects of partially replacing NCA with steel slag aggregate (SSA) and incorporating varying volumes of steel fiber (SF) on the mechanical and microstructural properties of concrete. Initially, NCA was substituted with 50% SSA, and SF was subsequently added in volume fractions of 0.15%, 0.3%, 0.45%, 0.6%, 0.75%, 0.9%, 1.05%, 1.2%, and 1.35% to evaluate its combined impact on different concrete properties. The concrete mixes were evaluated through workability, fresh density, compressive strength (CS), split tensile strength (STS), flexural strength (FS), rebound hammer (RH), and field emission scanning electron microscopy (FESEM) tests. The results revealed that the mix with 50% SSA and 1.05% SF achieved optimal CS and RH values, while the mix containing 50% SSA and 1.2% SF demonstrated superior STS and FS. Compared to standard concrete (SC), the CS, RH, STS, and FS of the optimized mixes were enhanced by 33.19%, 41.37%, 36.47%, and 39.73%, respectively, showcasing the strength-enhancing potential of steel slag fiber-reinforced concrete (SSFRC). Furthermore, FESEM analysis indicated improved interfacial bonding in the SSFRC. Additionally, the experimental results were compared with existing empirical formulas, and regression models were developed to predict STS and FS from CS. Strong interrelationships were observed, with correlation coefficients of 0.988 and 0.963, respectively. This study highlights SSA as a sustainable alternative to NCA, contributing to resource conservation. The addition of SF further improves the overall properties of the concrete. These findings promote sustainable concrete by enhancing material efficiency and providing environmental benefits for future construction.

Failure Mechanism in TRM-Strengthened Damaged Concrete Based on Three-Dimensional Mesoscale Modeling

2025-06-20
Tong Cai , Xuan Wang , Zihua Zhang +1 more | Journal of Composites for Construction

Performance assessment of engineered cementitious composites reinforced with hybrid steel and macro polypropylene fibers

2025-06-20
Shimaa M. Mahmoud , Mohamed E. El-Zoughiby , Ahmed M. Tahwia | Construction and Building Materials

Predicting the Influence of Aggregate Size and Distribution on Cementitious Concrete Properties: A Review

2025-06-20
Innocent J. Macha , Habert Ayesiga , Mahamudu Mtebwa | Tanzania Journal of Engineering and Technology
Cement concrete has been in use for centuries as one of the primary construction materials. Its demand in the construction industry is expected to continue for several centuries before the … Cement concrete has been in use for centuries as one of the primary construction materials. Its demand in the construction industry is expected to continue for several centuries before the full development of alternative products. However, one of the main areas of research interest is understanding how its constituents can be tailored to make its properties predictable to reduce risks associated with structural failures, reconstruction and reduced durability. These hindrances associated with cementitious concrete result from several attributes, including constituent material characteristics, mixing ratios and workmanship. Understanding the predictability of cement concrete properties requires computer modelling tools to provide reliable information for the mix design, construction, management and operation of cement concrete, and cement concrete structures. This paper reviews progresses in machine learning models for predicting cement concrete properties. Several algorithms have been reviewed, highlighting their applications, knowledge gaps and suggestions for future research. The paper provides a basis for selecting appropriate algorithms for predicting different concrete properties.

Predicting the Influence of Aggregate Size and Distribution on Cementitious Concrete Properties: A Review

2025-06-20
Mahamudu Mtebwa , Habert Ayesiga , Innocent J. Macha | Tanzania Journal of Engineering and Technology
Cement concrete has been in use for centuries as one of the primary construction materials. Its demand in the construction industry is expected to continue for several centuries before the … Cement concrete has been in use for centuries as one of the primary construction materials. Its demand in the construction industry is expected to continue for several centuries before the full development of alternative products. However, one of the main areas of research interest is understanding how its constituents can be tailored to make its properties predictable to reduce risks associated with structural failures, reconstruction and reduced durability. These hindrances associated with cementitious concrete result from several attributes, including constituent material characteristics, mixing ratios and workmanship. Understanding the predictability of cement concrete properties requires computer modelling tools to provide reliable information for the mix design, construction, management and operation of cement concrete, and cement concrete structures. This paper reviews progresses in machine learning models for predicting cement concrete properties. Several algorithms have been reviewed, highlighting their applications, knowledge gaps and suggestions for future research. The paper provides a basis for selecting appropriate algorithms for predicting different concrete properties.

Assessment of the mechanical attributes via mathematical simulations for distinct sizes of morsel rubber

2025-06-20
Engammagari Ganesh , Yaswanth Kumar , Santhosh Kumar M V +1 more | International Journal of Science and Research Archive
Rubber waste is a significant environmental and health problem worldwide, resulting from the non-biodegradability of rubber products and increasing rubber production. The primary sources of rubber waste include discarded tires … Rubber waste is a significant environmental and health problem worldwide, resulting from the non-biodegradability of rubber products and increasing rubber production. The primary sources of rubber waste include discarded tires and waste generated during the production of rubber products. Environmental pollution and health risks result from the improper disposal of rubber waste, which includes burning and dumping in landfills. Rubber waste as a replacement for sand in concrete has gained attention in recent years due to the growing problem of rubber waste and the environmental benefits of reducing sand consumption. This research aims to see the variation in concrete properties by using distinct particle sizes of rubber waste as a partial replacement for sand in concrete. An experimental result has been produced by substituting morsel rubber waste particles for fine aggregates in concrete in amounts ranging from 0% to 10% while adding 2.5% to the standard concrete's strength benchmarks. The concrete with and without Bakelite plastic waste as aggregates was observed in the compressive, abrasion, impact energy, water absorption, water permeability, and microstructural properties tests, displaying good strengths. After strength parameters were examined, the most robust concrete was produced using fly ash-based concrete with a 7.5% BPW content. The addition of rubber waste can improve the properties of concrete, such as reducing its weight and increasing its energy absorption capacity. However, using rubber waste in concrete has some limitations, such as lowering compressive strength.

Analysis of Splitting Resistance and Damage Evolution of Fiber Reinforced Concrete Based on Acoustic Emission Parameters

2025-06-20
Xueyan Hou , Jian Shi , Yi Zhao +1 more | Academic Journal of Science and Technology
Aiming at the splitting resistance and damage process of fiber reinforced concrete, this study uses a universal testing machine and an acoustic emission (AE) system to carry out splitting resistance … Aiming at the splitting resistance and damage process of fiber reinforced concrete, this study uses a universal testing machine and an acoustic emission (AE) system to carry out splitting resistance tests on plain concrete and reinforced concrete containing steel fibers, polypropylene fibers, and cellulose fibers. Load-displacement curves and AE parameters were collected. By analyzing parameters such as load, displacement, ring-down count, average frequency (AF), and rise time/amplitude (RA), the splitting resistance and damage evolution laws of different fiber-reinforced concrete materials were analyzed. The results show that the steel fiber specimen has the highest splitting tensile strength, which is 45.9% higher than that of plain concrete. AE ring-down count shows that the peak ring-down count of the steel fiber specimen is the largest; the duration of the ring-down count of the polypropylene and cellulose specimens is close to that of plain concrete. The proportion of tensile cracks in all specimens is &gt;60%, and the fibers delay the tensile failure by inducing shear energy dissipation. The damage mode of steel fiber concrete changes from interface slip to plastic deformation. Steel fibers significantly improve the ductility of concrete through the bridging effect. This study can provide support for the optimization of engineering structure performance.

FUNDAMENTAL STUDY ON THE EFFECT OF THE AMOUNT OF MINOR ADDITIONAL CONSTITUENTS IN CEMENT ON THE ACTIVITY INDEX TEST RESULTS OF MICRO POWDER FOR ULTRA-HIGH STRENGTH CONCRETE

2025-06-19
Hiroshi Jinnai | AIJ Journal of Technology and Design

A comprehensive study of perlite in building materials: balancing sustainability and performance

2025-06-19
Ahmed Abed , Éva Lublóy | Journal of Thermal Analysis and Calorimetry

An alternative design for deconstructable external semi-rigid composite joints with precast geopolymer concrete slabs: Experimental study

2025-06-19
Ali Abdulkarim , Abdolreza Ataei , Hossein Tajmir Riahi | Engineering Structures

Fracture toughness of steel-polypropylene hybrid fibre reinforced shotcrete and its feasibility in squeezing tunnels

2025-06-19
Haibo Wang , Tugen Feng , Yunyong He +3 more | Construction and Building Materials

Exploring the dynamic mechanical properties of self-compacting concrete with recycled asphalt pavement through FDM and DEM coupling approach

2025-06-19
He Liu , Zhiyong Yan , Wei Bian +4 more | Materials and Structures