Review
Environmental Sciences
Yue Liu, Yan Zhuge, Wei Fan, Weiwei Duan, Lei Wang
Summary: Self-healing concrete is an innovative construction material that can automatically repair cracks, reducing the need for maintenance and increasing the lifespan of concrete structures. Using waste materials to manufacture self-healing concrete can lower the cost and promote its application in practice.
ENVIRONMENTAL RESEARCH
(2022)
Article
Construction & Building Technology
Amirhosein Sahraei Moghadam, Fereydoon Omidinasab, Mehdi Abdalikia
Summary: The study showed that the initial strength of recycled concrete aggregates (RCA) has a significant impact on the workability, quality, and mechanical properties of concrete. It is suggested that increasing the initial strength of RCAs and incorporating recycled steel fibers (RSF) can mitigate the negative effects. Multi-criteria optimization indicated that using 50% RCA with initial strength of 40 and 80 MPa, along with RSF, is justified in terms of several parameters including workability, quality, water absorption, mechanical properties, and economic aspects.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Geological
Behnam Ghorbani, Ehsan Yaghoubi, Arul Arulrajah
Summary: This study aims to evaluate the effect of waste PET on the properties of recycled concrete aggregate (RCA) as a pavement material, developing a resilient modulus constitutive model using the multivariate adaptive regression spline approach. The research provides insights into the thermal and mechanical properties of recycled materials for pavement and geotechnical applications.
Article
Construction & Building Technology
Uma Chandru, A. Bahurudeen, R. Senthilkumar
Summary: River sand is widely used as fine aggregates in concrete, but its excessive mining has led to its prohibition in construction in several countries. Therefore, the review explores the potential reuse of different types of recycled fine aggregates from construction and demolition wastes as alternative fine aggregates in ordinary concrete and PPC concrete. The influence of recycled fine aggregates on various properties of concrete, such as workability, density, strength, and shrinkage, is comprehensively compared.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Mahmoud Elsayed, Samar R. Abd-Allah, Mohamed Said, Ahmed Abdel El-Azim
Summary: The main goal of this paper is to evaluate the flexural and shear performance of reinforced concrete (RC) beams containing recycled coarse aggregate (RCA), waste aluminum fiber (WAF) and waste glass powder (WGP). Results showed that using a combination of RCA and WAF has an adverse influence on the slump of concrete mixes. Conversely, adding WAF resulted in an improvement in mechanical characteristics of recycled coarse aggregate concrete (RCAC) mixes.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Construction & Building Technology
Abraham T. Gebremariam, Ali Vahidi, Francesco Di Maio, J. Moreno-Juez, I Vegas-Ramiro, Artur Lagosz, Radoslaw Mroz, Peter Rem
Summary: This study focuses on formulating sustainable concrete by incorporating recycled concrete aggregates and other products from C&D activities. It fully replaces natural aggregates with RCA and RFA, and further improves the modulus of elasticity by adding RCU, RGU, and RMF. The resulting concrete, comprising over 75% recycled components, demonstrates acceptable mechanical properties and durability, showcasing the potential of recycled aggregates in sustainable construction practices.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Bolin Wang, Mingang Zhai, Xiaofei Yao, Qing Wu, Min Yang, Xiangyu Wang, Jizhuo Huang, Hongyu Zhao
Summary: In this study, the printable and mechanical properties of 3D printable cementitious materials combined with industrial wastes were investigated. A high-sensitivity evaluation indicator was established to explore the influence of industrial wastes on the printability of 3D printable mortars.
Article
Green & Sustainable Science & Technology
Muhammad Talha Amir, Sobia Riaz, Hawreen Ahmed, Syed Safdar Raza, Ahmed Ali A. Shohan, Saleh Alsulamy
Summary: The study investigates the effects of micro-silica (MS) and recycled tire steel fiber (RTSF) on the mechanical and physical properties of recycled aggregate concrete (RAC). The natural coarse aggregates (NCA) were replaced by recycled coarse aggregates (RCA) to prepare RAC. High-strength RAC mixes were prepared by replacing 5% and 10% of Portland cement with MS. RTSF was incorporated as 0%, 0.5%, 1 and 2% by volume fraction with each level of MS. In addition to mechanical properties, ultrasonic pulse velocity (UPV), electrical resistivity (ER), and water absorption (WA) of the mixes were also evaluated. The experimental investigation revealed that RTSF substantially increased the tensile strength of RAC, whereas MS improved the durability of RTSF-reinforced RAC. RAC made with 1% RTSF and 10% MS showed 54% more splitting-tensile strength compared to the plain natural aggregate concrete (PNAC). The WA capacity of RAC incorporating 10% MS was 15-22% lower than that of the PNAC.
Article
Materials Science, Multidisciplinary
Juliana Vieira Martins, Maria Teresa Paulino Aguilar, Dayana Cristina Silva Garcia, White Jose dos Santos
Summary: This study evaluates the forms of concrete waste generation in concrete batching plants (CBP) in Belo Horizonte, Brazil, and focuses on the reuse of this waste in the productive sector of CBP. The research reveals that the current waste management methods in CBP are inefficient and costly, and proposes for the reuse of waste within the company to reduce costs and identify potential reuse options.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Ibrahim Y. Hakeem, Mohammad Alharthai, Mohamed Amin, Abdullah M. Zeyad, Bassam A. Tayeh, Ibrahim Saad Agwa
Summary: This research study investigates the effects of adding nanosilica (NS) to sustainable high-strength concrete (SHSC). Different mixtures were developed using recycled aggregates as an alternative to coarse aggregate and industrial waste as supplementary cementitious materials. The addition of NS improved the mechanical properties and sustainability performance of SHSC, particularly when used in combination with quaternary blends. The highest performance was achieved by the SHSC mixture containing 3% NS and 50% quaternary mixture, with improved compressive strength, tensile strength, flexural strength, and transport properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Construction & Building Technology
Trinh Nhat Ho Tran, Avirut Puttiwongrak, Phattharachai Pongsopha, Darrakorn Intarabut, Pitthaya Jamsawang, Piti Sukontasukkul
Summary: The study investigated the properties of fiber reinforced pervious concrete (FRPC) with a focus on microparticle filtration. Results showed that the addition of fibers decreased compressive and flexural strengths but improved microparticle filtration ability. Additionally, the use of silica fume and smaller size aggregates had positive effects on the filtration ability of pervious concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Pei Gy Goh, Mehdi Maghfouri, Chiu Chuen Onn, Siaw Chuing Loo
Summary: The utilization of e-plastic as a substitute for natural coarse aggregate in concrete can reduce environmental impact and decrease costs. Life cycle assessment (LCA) was used to determine the potential reduction in environmental impact compared to conventional concrete. However, the presence of additives in certain scenarios generated negative environmental impacts.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Engineering, Civil
Tarek S. Mustafa, Ahmed A. Mahmoud, Enas M. Mories, Sherif A. El Beshlawy
Summary: Due to environmentally unsustainable industrialization, concrete can use glass powder as a cement replacement to achieve sustainability. This study focuses on the experimental results of reinforced concrete slabs containing recycled glass powder and steel fibers. The experimental variables include the ratios of glass powder to cement, addition of steel fibers, slab thickness, and longitudinal reinforcement ratio. The results show that using 10% glass powder as a replacement for cement improves the compressive and splitting strengths of the concrete, while using 20% glass powder lowers the strengths. The addition of steel fibers enhances the performance, toughness, and stiffness of the concrete slabs. The experiment results align well with different design codes, with an average predicted load capacity of 0.99 and a standard deviation of 0.10.
Article
Chemistry, Physical
Laura Caneda-Martinez, Manuel Monasterio, Jaime Moreno-Juez, Sagrario Martinez-Ramirez, Rosario Garcia, Moises Frias
Summary: This study investigated the influence of fine concrete fractions from construction and demolition waste on blended cement pastes, finding that they can be used as partial replacements without compromising physical and mechanical requirements of common cements. The environmental benefits of reusing these fine wastes were examined, and the Life Cycle Assessment (LCA) showed a reduction in overall environmental impact in proportion to the replacement rate, aligning with Circular Economy goals and the 2030 Agenda for Sustainable Development.
Article
Green & Sustainable Science & Technology
Jun-Xi Deng, Xiao Li, Xiao-Juan Li, Tai-Bing Wei
Summary: This research investigates the mechanical and thermal properties of recycled-straw insulating concrete, explores the optimal mix ratio, and analyzes the insulation performance using finite element analysis. The results show that the recycled-straw insulating concrete has better thermal insulation performance, which can save heating costs and reduce carbon dioxide emissions in winter.
Article
Polymer Science
Maher A. Adam, Abeer M. Erfan, Fatma A. Habib, Taha A. El-Sayed
Summary: Structural testing and finite element simulation were conducted on high-strength concrete slab specimens reinforced with locally produced GFRP reinforcement, showing that GFRP reinforcement improves slab ductility and increases deflection compared to traditional steel reinforcement.
Article
Construction & Building Technology
Abeer M. Erfan, Ragab M. Abd Elnaby, Ammar Elhawary, Taha A. El-Sayed
Summary: This study investigated the behavior of RC walls reinforced with different types of ferrocement composites under concentric and eccentric loading through experimental examination and finite element analysis. The findings showed that specimens reinforced with expanded or glass fiber wire mesh ferrocement exhibited enhanced ultimate loads under both loading conditions compared to control specimens. Additionally, glass fiber wire mesh reinforcement demonstrated higher first cracking load, serviceability load, load carrying capacity, and energy absorption compared to expanded wire mesh reinforcement. Good agreement was found between numerical and experimental results in various aspects of structural behavior, indicating the reliability of finite element analysis in estimating the performance of nonlinear ferrocement RC walls.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2021)
Article
Construction & Building Technology
Abeer M. Erfan, Ragab M. Abd Elnaby, Abdel Aziz Badr, Taha A. El-sayed
Summary: This study demonstrates the improved flexural performance of HSC one-way reinforced concrete slabs reinforced with BFRP bars compared to slabs reinforced with steel reinforcement. The study validates the structural behavior of BFRP concrete slabs through experimental and numerical analysis, showing a high level of consistency between the two methods. The tensile strength superiority of BFRP bars over steel reinforcement is highlighted as a key factor contributing to the enhanced performance of the concrete slabs.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2021)
Article
Polymer Science
Taha Awadallah El-Sayed
Summary: Geopolymer concrete is a substantial type created using various binding ingredients, the study aimed to manufacture new columns with unique features to replace traditional concrete members and reduce costs. Ferrocement geopolymer columns with expanded or welded reinforcement showed higher ultimate failure loads than control columns, while columns reinforced with one-layer of nonmetallic Tensar-mesh obtained higher ultimate failure loads.
Article
Polymer Science
Taha Awadallah El-Sayed
Summary: Permeable concrete using rice and wheat straw ash as partial replacements for cement shows improved strength, compaction factor, permeability, and porosity. The study also includes flexural load testing with reinforcement and numerical simulations, confirming the experimental results. This type of concrete can have various applications in construction.
Article
Construction & Building Technology
Taha A. El-Sayed, Abeer M. Erfan, Ragab M. Abdelnaby, Mohamed K. Soliman
Summary: This study presents experimental and analytical investigations on the flexural performance of high-strength concrete beams reinforced with locally manufactured hybrid-GFRP bars. The results show that the use of hybrid-GFRP bars significantly affects the ultimate load, deflection, and crack pattern of the beams.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Polymer Science
Fahid Aslam, Mohamed AbdelMongy, Majed Alzara, Taha Ibrahim, Ahmed Farouk Deifalla, Ahmed M. Yosri
Summary: This study investigates the two-way shear strength of concrete slabs with FRP reinforcements, comparing 21 strength models and analyzing data from 248 concrete slabs. It identifies behavior trends and correlations between strength and various parameters. The ACI model is the least consistent, while the EE-b model is the most consistent due to its use of observed behavior and mechanical bases.
Article
Construction & Building Technology
Taha A. El-Sayed, Yousry B. Shaheen, Mohamed M. AbouBakr, Ragab M. Abdelnaby
Summary: This study investigates the performance of ferrocement pipes reinforced with various metallic and non-metallic materials. Experimental testing and numerical simulations were conducted to observe and quantify parameters such as cracking patterns, stress distribution, failure mechanism, elastic stiffness, and energy absorption. The study demonstrates the effectiveness of different mesh materials in reinforcing the pipes and highlights the exceptional strength of ferrocement water pipes for both industrialized and developing countries.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Amr El-said, Ahmed Awad, Taha A. El-Sayed, Yasin Onuralp Ozkilic, A. Deifalla, Maged Tawfik
Summary: In this study, a plasticity-based model was developed and proposed for fiber-reinforced polymer-reinforced concrete elements under one-way shear. The accuracy, consistency, and safety of the model were assessed against an extensive experimental database, and it was found to be reliable and more accurate compared to existing methods. Moreover, the modeling of FRP's axial rigidity was found to be more consistent when using Young's modulus.
FRONTIERS IN MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Moamen Gasser, Omar Mahmoud, Taha Elsayed, Ahmed Deifalla
Summary: Shear strengthening of reinforced concrete using external fiber-reinforced polymer jackets can improve building sustainability worldwide, but the limited reliability and accuracy of proposed shear equations require further investigation. Machine-learning techniques have been successfully used to develop strength models for complex problems, and this study aims to provide a reliable machine-learning model for shear strengthening of reinforced concrete beams using externally reinforced fiber polymer sheets. The proposed model showed better agreement with experimental data compared to previous models and could guide future developments in design codes and mechanical models.
FRONTIERS IN MATERIALS
(2023)
Article
Engineering, Civil
Taha A. El-Sayed, Ahmed F. Deifalla, Yousry B. Shaheen, Hossam H. Ahmed, Aya K. Youssef
Summary: This study investigates the flexural behavior of geopolymer ferrocement beams under axial flexural stress. The results show that beams reinforced with welded steel wire mesh outperform other materials in terms of carrying capacity, impact resistance, and ductility. Nonlinear finite element analysis is used to demonstrate the behavior of composite ferrocement geopolymer beams.
CIVIL ENGINEERING JOURNAL-TEHRAN
(2023)
Article
Construction & Building Technology
Amr El-said, Ahmed F. Deifalla, Saif Eldeen A. S. Yousef, Taha A. El-Sayed, Maged Tawfik, Nehal M. Ayash
Summary: There is no consensus among different design codes on how to predict punching shear for footings, and this inconsistency is inconsistent with experimentally observed capacity. The inconsistency is attributed to differences in the definition of the critical section, handling of influential parameters, modeling of subsoil, and consideration of reinforcement material characteristics. The current study evaluated the safety level of international design codes using 195 RC column footings and found that all selected methods underestimated the punching shear capacity compared to experimental results. The BS8110 design code was the most conservative, while PrEC2 was the closest to measurements and the most reliable.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Construction & Building Technology
Taha A. El-Sayed, Kareem S. Abdallah, Hossam E. Ahmed, Tamer H. El-Afandy
Summary: This study investigated the axial compressive behavior of Ultra-High Strength Concrete (UHPC) columns reinforced with basalt bars. A total of 12 columns with cross-sections of 150 x 150 mm and a height of 1200 mm, made of M120 grade UHPC and incorporating glass powder lime powder, were tested. The findings showed that the UHPC columns reinforced with BFRP had superior ultimate loads and behavior compared to concrete columns strengthened with steel reinforcement. The BFRP bar tensile strength was also significantly higher than that of reinforcing steel. The Ansys software-based analytical analysis accurately predicted the carrying capacity of UHPC columns.
INTERNATIONAL JOURNAL OF CONCRETE STRUCTURES AND MATERIALS
(2023)
Article
Construction & Building Technology
Taha A. El-Sayed, Yousry B. Shaheen, Fatma H. Mohamed, Ragab M. Abdelnaby
Summary: Due to its high strength-to-weight ratio, flexibility, and adaptability to diverse forms and shapes, ferrocement has been considered as an alternative to traditional construction materials. This research investigates the behavior of ferrocement composite tanks under static pressure loads. The experimental and numerical analysis shows that ferrocement composite tanks, especially those reinforced with fiberglass polymer-mesh, have a higher failure load than traditional reinforced concrete tanks. Finite element simulations generated better results than the experimental data.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Construction & Building Technology
Kareem S. Ghareeb, Hossam E. Ahmed, Tamer H. El-Affandy, Ahmed F. Deifalla, Taha A. El-Sayed
Summary: UHP self-compacted concrete is an innovative category of concrete with higher durability and compressive strength than conventional concrete. This study investigates the use of recycled glass and lime powder as substitution materials to improve the flowability, durability, and mechanical properties of UHPSCC. The test results show that the incorporation of these materials partially replaced cement and enhanced the flowability and strength of UHPSCC.
Article
Construction & Building Technology
Qi Jiang, Wei Liu, Shaopeng Wu, Xuanwen Gou
Summary: This study analyzes the erosion mechanisms of NaCl solution on asphalt concrete and finds that NaCl solution softens asphalt and promotes the intrusion of crystalline salt into it. Salt crystallization alters the surface roughness of aggregates, resulting in a decrease in skid resistance but an improvement in compressive strength. Additionally, the concentration of NaCl solution initially has no significant impact on the mechanical performance of asphalt concrete, but its domination gradually increases with the intensification of cyclic effects.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Lili Kan, Lan-qing Dai, Ning Kong, Bin Peng, Fei Wang
Summary: This paper investigates the effect of freezing and thawing cycles on the tensile behavior of cracked ultra-high performance concrete (UHPC). The results show that long-term freezing and thawing action deteriorates the cracking strength, tensile strength, tensile strain, and strain energy of cracked UHPC. On the other hand, the action of water generally favors the development of tensile properties of UHPC. The crack distribution tends to be unsaturated under freezing and thawing environment, and the re-hydration reaction is hindered. The pore structure near the crack varies under different environments.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Xin Xiao, Jingwei Li, Qingke Meng, Xiangshan Hou, Yanhui Liu, Xujiang Wang, Wenlong Wang, Shengtao Lu, Yuzhong Li, Yanpeng Mao, Tong Li
Summary: Preparing gypsum-based self-leveling mortar (GSLM) using beta-hemihydrate gypsum and solid wastes-derived sulfoaluminate cement (WSAC) can improve the mechanical performance of the mortar, but phosphorus impurities can weaken the hydration speed and degree.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Sihang Bao, Junzhen Di, Yanrong Dong, Ziqing Gao, Qing Gu, Yuanfang Zhao, Hongyu Zhai
Summary: Tailings dam break and leakage accidents pose a threat to the safety of people in mining areas and cause severe environmental pollution. This study focuses on solidifying tailing sand using microbial induced calcite precipitation (MICP) to improve strength and fix heavy metals. The curing time of MICP bio-cemented tailings is found to significantly impact the strength of tailings, while its effect on heavy metal fixation is minimal. The optimized MICP curing time is 10 days, resulting in improved strength and cementation of tailings particles.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Ferhat Benmahiddine, Fares Bennai, Achraf Charaka, Ameur El Amine Hamami, Abdelkader Tahakourt, Rafik Belarbi
Summary: This paper studied the effects of hysteresis on the hygrothermal behavior at the building scale. Through laboratory validation and numerical simulations, it was found that hysteresis has a significant impact on the relative humidity and total heat fluxes in buildings, while it does not have a noticeable effect on temperature variations.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
You Gao, Wei He, Xiayang Zhang, De'an Sun, Pei Li
Summary: This study determined the boundary line between the swelling and compression deformation zone in lateritic clay through wetting tests, and proposed a simple bimodal SWRC model. It also found that the existing strength model underestimated the tested values in the medium to high suction range, therefore a segmented strength equation was introduced for enhanced predictions of the strength properties of lateritic clay.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Prabhath Ranjan Kumar Soda, Asheer Mogal, Kalyan Chakravarthy, Nikhil Thota, Nimish Bandaru, Sanjay Kumar Shukla, K. M. Mini
Summary: This study investigates the use of encapsulated bacteria to improve the self-healing ability of concrete. Through various tests, it is found that using 20% cement-coated alginate beads (CCAB) and 5% nanosilica (NS) can achieve optimal strength and healing. This research is significant for enhancing the durability of concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Shizhe Wang, Haiping Wu, Wen Yang, Wei Wang, Zhibo Zhu, Kun Nie, Luoxin Wang, Hua Wang, Jing Wu
Summary: In this study, photothermal-heat storage concrete (PHSC) was developed with excellent photothermal conversion performance and heat storage capacity. By absorbing and storing solar energy during the day and releasing it at night, PHSC can effectively reduce energy consumption in buildings.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Robin Deb, Jialuo He, Geetika Mishra, Yaghoob (Amir) Farnam
Summary: Incorporation techniques of phase change materials in cementitious composites have a significant influence on thermal properties. This study investigated the thermal behavior of low-temperature PCM when subjected to varying temperature change rates and pore confinement inside the porous network of lightweight aggregates. The results showed that ramp rates affect the nucleation and crystallization growth process during the phase transition, and the pore structure of the aggregates affects the supercooling phenomenon and confinement pressure of the PCM.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Eduardo Ferreira, Payam Sotoudeh, Dagmar Svecova
Summary: This study investigates the fatigue behavior of concrete under different stress reversal conditions. The results indicate that stress reversal generally causes more severe damage and reduces the cycles to failure compared to tensile fatigue. Additionally, adding some level of compression contributes to the energy required for failure under stress reversal fatigue. Specimens with higher concentration of fractured aggregates achieve longer fatigue lives.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Mag Raj Gehlot, Sandeep Shrivastava
Summary: This study evaluates the compatibility relationship between plaster bonds and the substrate under an accelerated aging environment, and finds that incorporating an appropriate amount of granite cutting waste can improve the strength parameters and adhesion of the cement mortar.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Min Zhang, Qirui Luo, Mingke Deng, Shixing Zhao
Summary: This study investigated the bond behavior between carbon FRCM composites with added short fibers and concrete substrates. The effects of different factors were considered and 36 specimens were tested and discussed. The experimental results were analyzed in terms of failure mode, load-slip curve, and characteristic parameters, and the contribution of weft yarns was taken into account in the developed bondslip model.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Dengkai Liu, Hongniao Chen, Ray Kai Leung Su
Summary: The susceptibility of building stones to fire and high temperature was investigated in this study by examining their physical and mechanical properties. The results show that both compressive and tensile properties of stones are affected by temperature changes. The tensile strength is particularly sensitive to temperature changes, requiring special attention to the components subjected to tensile stress in stone buildings. Principal component analysis was used to predict the mechanical properties of stones, providing a new method for calculating the residual mechanical properties after high temperature or fire.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Joso Maria Raposo, Eduardo Cavaco, Luis Costa Neves, Eduardo Julio
Summary: This paper investigates the correlation between the friction coefficient and the surface roughness of concrete-to-concrete interfaces. Experimental tests were performed on specimens with different surface treatments, and the surface roughness parameters were analyzed and correlated with the shear strength and friction coefficient. The results showed that certain roughness parameters had a strong positive correlation with the friction coefficient, while others had little or no correlation. A novel combined roughness parameter with optimized correlation was proposed.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Chiara Riccardi, Massimo Losa
Summary: The interest in using bio materials in asphalt pavements is growing due to economic reasons and environmental benefits. This study aimed to review the use of bio extenders as additives in binders, with a focus on replacements greater than 20% of fossil binder. The properties of bio-extended binders were found to vary substantially depending on the biomass source and production process.
CONSTRUCTION AND BUILDING MATERIALS
(2024)