Article
Chemistry, Physical
Roman Jaskulski, Pavel Reiterman, Wojciech Kubissa, Yaroslav Yakymechko
Summary: The study found that impregnation of recycled concrete aggregate can enhance the mechanical properties of concrete but may reduce its resistance to cyclic freezing and thawing. The order in which impregnants are applied influences the effect obtained, with cement paste being the best impregnation method.
Article
Chemistry, Multidisciplinary
Pu Jia, Lang Li, Jin Zhou, Di Zhang, Zhongwei Guan, Jiangfeng Dong, Qingyuan Wang
Summary: The high porosity of recycled coarse aggregate limits the application of recycled aggregate concrete in civil engineering. This study experimentally investigated the combined effects of freeze-thaw damage and sulfate attack on the mechanical properties of high-performance recycled aggregate concrete. The results showed that water-exposed freeze-thaw cycles caused more severe deterioration in mass loss, elastic modulus, and compressive strength, while sulfate-exposed freeze-thaw cycles led to significant degradation in splitting tensile strength and fracture energy.
APPLIED SCIENCES-BASEL
(2022)
Article
Construction & Building Technology
Dujian Zou, Zhongzhen Wang, Mingming Shen, Tiejun Liu, Ao Zhou
Summary: Two silane emulsion modification methods, surface modification of recycled aggregate and integral modification of cement matrix, were used to improve the freeze-thaw durability of recycled aggregate permeable concrete. The results indicate that surface modification of recycled aggregate can more effectively increase both the compressive strength and freeze-thaw durability of recycled aggregate permeable concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Physical
Hossein Sasanipour, Farhad Aslani, Javad Taherinezhad
Summary: This paper investigates the salt-scaling resistance of recycled aggregate concrete produced with pretreated RCAs. Various tests were conducted to evaluate the performance of different concrete mixes, and the results show that surface modification of RCAs can improve the durability of concrete.
Article
Construction & Building Technology
Oguzhan Yavuz Bayraktar, Gokhan Kaplan, Ahmet Benli
Summary: The objective of this study was to investigate the effects of recycled fine aggregates (RFA) on the properties of concrete. The results showed that the use of RFA improved the compressive strength and abrasion resistance of the concrete.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
Bin Lei, Wengui Li, Zhiyu Luo, Xitao Li, Vivian. W. Y. Tam, Zhuo Tang
Summary: This study found that stress level is the most influential factor affecting the durability of sustainable recycled aggregate concrete (RAC), followed by RAC strength grade and the number of times the alternating load applied. Using a novel intermittent loading mode to simulate the durability of RAC under sustained loading and environmental factors is feasible and reasonable. Fitting equations were proposed to discuss the effects of alternating load cycles, stress levels, and mechanical strength on the mechanical strength loss and durability of RAC.
JOURNAL OF SUSTAINABLE CEMENT-BASED MATERIALS
(2021)
Article
Construction & Building Technology
Jian Liu, Kunlin Ma, Jingtao Shen, Jianbin Zhu, Guangcheng Long, Youjun Xie, Baoju Liu
Summary: This study investigated the influence of carbonation and chemical enhancement on the microstructure of recycled concrete aggregate (RCA). The results showed that carbonation had limited strengthening effect on the interfacial transition zone (ITZ) between old aggregate and new paste (ITZ1), while soaking RCA in Na2SiO3 saturated solution and CEM-SF slurries improved ITZ1. Both carbonation and chemical enhancement had obvious improvement on ITZ2. Soaking in CEM-SF slurries had a better improvement effect on ITZs.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Xi Peng, Feiting Shi, Jingnan Yang, Qiuwei Yang, Hui Wang, Junyi Zhang
Summary: Although the utilization of CWDRA is a promising way to reduce carbon emission and energy consumption, the resistance of reinforced concrete containing CWDRA to corrosion and freeze-thaw cycles is usually inferior to that containing natural aggregate. This study aims to enhance the corrosive freeze-thaw durability of green concrete by utilizing CO2 curing technology on CWDRA. The results show that CO2 treatment on CWDRA significantly alleviates the concrete damage caused by NaCl F-T cycles and enhances the compressive and flexural strength, reduces the chloride migration coefficient, and decreases the corrosion speed of reinforced concrete.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Green & Sustainable Science & Technology
Miras Mamirov, Jiong Hu, Tara Cavalline
Summary: Recycling offers benefits in minimizing waste, but the use of recycled concrete aggregate (RCA) is limited due to the absence of effective characterization. This study aims to develop a testing protocol to characterize RCA and has achieved a better understanding of its properties. The success of the study will encourage the use of RCA in concrete production.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Construction & Building Technology
Chen Chen, Kai Zhang, Zhigang Yin, Jing Zhou
Summary: The performance of recycled aggregate pervious concrete (RAPC) in severe cold regions was studied. The influence of water-binder ratio, design porosity, micro silica fume, and enhancer agent on permeability and mechanical properties of RAPC was evaluated. Freeze-thaw experiments were conducted to investigate the effect of different media on mechanical properties, permeability, and anti-frost durability of RAPC. Damage evolution models of RAPC under different freeze-thaw media were established.
Article
Construction & Building Technology
Qingmei Li, Xunxiao Li, Yuanzhang Wang, Tao Xie, Suntong Zhou
Summary: Freeze-thaw damage is a significant factor affecting the durability of concrete structures. This study found that the coarse aggregate volume fraction has a notable influence on freeze-thaw damage, while the salt solution concentration has minimal effects. The dynamic elastic modulus increases with an increasing coarse aggregate volume fraction, while the cumulative scaling quantity decreases significantly.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2021)
Article
Construction & Building Technology
Lucen Hao, Yuanzhen Liu, Jianzhuang Xiao
Summary: The testing program showed that flexural-load stress negatively affects the freeze-thaw resistance of RATIC, while an increase in thermal insulation aggregate GHBs can enhance its performance. Analysis through various methods revealed the damage mechanism of RATIC under combined actions.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Jiasheng Jiang, Haifeng Yang, Zhiheng Deng, Zuohua Li
Summary: This paper investigated the bond performance of recycled concrete under the influence of factors such as freeze-thaw cycles and repeated loading, and drew relevant conclusions.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Da Wei, Pinghua Zhu, Xiancui Yan, Hui Liu, Chunhong Chen, Zhen Wang
Summary: This paper evaluates the reuse potential of waste recycled aggregate concrete (RAC) as coarse recycled aggregate (CRA) for structural concrete in a freeze-thaw (FT) environment. It investigates the evolution process of FT damage on the physical properties of the second-generation CRA. The results show that the physical properties of the second-generation CRA deteriorate with the accumulation of FT damage, limiting its application in structural concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Fuyuan Gong, Zhao Wang, Liu Yang, Yingjie Ning, Tamon Ueda
Summary: Freeze-thaw modification can effectively remove attached mortar from recycled coarse aggregate (RCA), promoting the use of eco-friendly materials. This paper presents a mesoscale analysis of mortar deterioration during freeze-thaw modification of RCA, modeling pore size distribution, pore pressure induced by ice formation, and meso-scale constitutive laws. The deformation and mechanical behaviors during freeze-thaw cycling, as well as the crack patterns, are simulated with different types of RCA. Experiment results are also used to show the effectiveness of freeze-thaw modification. An empirical model is developed to calculate the deteriorated mechanical properties of RCA based on the numerical analysis.
JOURNAL OF SUSTAINABLE CEMENT-BASED MATERIALS
(2023)
Article
Engineering, Mechanical
Bin Lei, Hongchen Yu, Yipu Guo, Hanbing Zhao, Kejin Wang, Wengui Li
Summary: The mechanical properties and strength failure criteria of multi-recycled aggregate concrete (multi-RAC) under combined compression and shear loading states were investigated. The study found that both the peak shear strength and peak shear displacement increased with the increased normal stress ratio. The study also established three compression-shear failure criterion models for RAC considering the regeneration cycles of coarse aggregate under planar stress state, and the stress invariance failure criterion model and octahedral stress failure criterion model provided high prediction accuracies.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Construction & Building Technology
Vivian W. Y. Tam, Anthony Butera, Khoa N. Le
Summary: This paper investigates and compares the performance of CO2 Concrete and ordinary virgin aggregate concrete in terms of shrinkage, concrete shrinkage reversibility, and permeability. The results show that CO2 Concrete consistently achieves similar to better performance than virgin aggregate concrete for drying shrinkage and permeability. CO2 Concrete with 30% and 50% recycled aggregate content outperforms virgin aggregate concrete in many cases. The injection of CO2 does not significantly affect the concrete shrinkage reversibility.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Xuanrui Zhang, Xiaofeng Wang, Chenguang Wan, Bo Yang, Zhuo Tang, Wengui Li
Summary: This study investigates the performance of asphalt binder and mixture modified by pre-treated crumb rubber through laboratory and field studies. The crumb rubber was pre-treated using a mechano-chemical method to enhance its surface activity and compatibility with asphalt binder. The properties of the modified asphalt binders and mixtures were systematically evaluated and showed improved performance such as reduced penetration value, higher softening point, enhanced tensile performance, improved elastic recovery, and greater aging resistance. The modified asphalt mixtures also demonstrated excellent road performance, and their application in practical engineering validated their feasibility and practicality.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Civil
Mingxue Ma, Vivian W. Y. Tam, Khoa N. LE, Anthony Butera, Wengui LI, Xiangyu Wang
Summary: In the current age of enhanced environmental awareness, transformation to sustainable management in the construction sector is needed. China currently produces the largest amount of construction and demolition (C&D) waste around the world, but the average recovery rate of the waste was only about 5% in 2017. In order to investigate problems in current C&D waste management in China, a cross-national comparative analysis is conducted among China and seven selected countries (Japan, South Korea, Germany, Italy, Austria, the Netherlands and the United Kingdom), to compare legal texts of national policies and laws which relate to C&D waste management and are currently being used. Through the comparison, problems in management of C&D waste in China are investigated. The problems could be concluded to: (a) inadequate guidance on recycling, (b) lack of market incentives in utilising recycled materials, (c) incomplete knowledge of stakeholders' responsibilities, (d) lack of penalty for other stakeholders, and (e) inefficient supervision system. By understanding these problems, this paper further provides recommendations to enhance the performance of C&D waste management in China.
JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT
(2023)
Article
Construction & Building Technology
Peiran Li, Wengui Li, Kejin Wang, John L. Zhou, Arnaud Castel, Shishun Zhang, Surendra P. Shah
Summary: In order to address the shortage of freshwater resource in island and coastal regions, the use of seawater in concrete mix shows significant economic and environmental benefits. This study investigates the hydration of Portland cement in seawater and quantitatively determines the composition of solid and liquid phases. The use of seawater not only increases the hydration rate of clinker, but also affects the evolution of phase assemblage. The results suggest the formation of Friedel's salt instead of sulfo-AFm in hydrated cement by seawater, leading to higher sulfate concentration and hindering ettringite conversion.
CEMENT & CONCRETE COMPOSITES
(2023)
Article
Thermodynamics
Archiman Lahiry, Khoa N. Le, Vo Nguyen Quoc Bao, Vivian W. Y. Tam
Summary: A simple and energy-efficient communication system configuration is proposed for UAV-ETs for WPT applications, improving WPT time and reducing power consumption compared to UAV-BSs. The study also introduces a holistic framework for energy efficiency optimization and hardware design parameters, as well as a 3D placement optimization for maximizing WPT time. Additionally, it examines the impact of AA losses and power amplifier efficiency on WPT time and presents a manufactured AA that meets the hardware component design requirements.
Article
Engineering, Civil
Clyde Zhengdao Li, Yu Zhen, Hengqin Wu, Zhe Chen, Bing Xiao, Vivian W. Y. Tam
Summary: Building Information Modeling (BIM) is the latest engineering brain used for the whole life cycle planning of construction projects. However, research on BIM lacks systematic review and analysis. In this paper, a holistic analysis method is adopted to comprehensively analyze the research trend of BIM in the field of engineering management. This research provides valuable insights for researchers and practitioners to identify influential research and journals, and understand the current research hotspots and future directions.
JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT
(2023)
Review
Engineering, Civil
Kun Lu, Xueyuan Deng, Xiaoyan Jiang, Baoquan Cheng, Vivian W. Y. Tam
Summary: This paper addresses the unclear state of LCCA based on BIM by reviewing 45 relevant peer-reviewed articles through a systematic literature search, selection, and assessment. The results show that three data exchange methods integrate BIM and LCCA. Precision management, optimization measures, and parameter analysis through BIM significantly improve the value of buildings. A methodological framework that combines LCC with other indicators based on BIM is summarized to assess life cycle sustainability costs.
JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT
(2023)
Article
Engineering, Environmental
Weiqi Xing, Vivian W. Y. Tam, Khoa N. Le, Jian Li Hao, Jun Wang
Summary: Massive emissions and energy consumption in concrete production pose threats to sustainable development and human health. Studies on sustainable concrete mainly focus on technical properties, while limited research has integrated life cycle assessment (LCA) to measure environmental impacts. This research examines 570 concrete mix designs incorporating recycled aggregate (RA) and supplementary cementitious materials (SCMs) to analyze their environmental behavior and develop a model to predict carbon emissions and energy consumption. The results show that the environmental impact of sustainable concrete is related to compressive strength, water-to-binder ratio, and RA/SCMs ratios, and the allocation coefficient and alternative fuel utilization significantly affect the impact.
RESOURCES CONSERVATION AND RECYCLING
(2023)
Article
Construction & Building Technology
Lei Liu, Vivian W. Y. Tam, Laura Almeida, Khoa N. Le
Summary: Rapid urbanization and rising living standards in China have led to significant increases in building energy consumption, creating environmental pressures. Accurately assessing national energy consumption can be challenging due to the complexity of energy systems. This study develops a national-level Integrated Dynamic Energy Assessment (IDEA) model to explore the interactions among energy-related factors and quantify the life cycle energy consumption of urban residential buildings in China. The results provide insights into the growth and connections of energy-related subsystems and reveal changes in occupants' energy-use behaviors.
ENERGY AND BUILDINGS
(2023)
Review
Green & Sustainable Science & Technology
Xiaoxiao Xu, Hao Yu, Qiuwen Sun, Vivian W. Y. Tam
Summary: This research aims to review the evolution of occupant behavior research, investigate the knowledge base and domains, and identify current research gaps and future directions. The results show that the focus has shifted from individual behavior to complex behaviors. By using bibliometric approach and content analysis on 2791 relevant articles, this research provides potential researchers with sufficient knowledge and inspires them for future studies.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Construction & Building Technology
Bin Lei, Qianghui Xiong, Hanbing Zhao, Wenkui Dong, Vivian W. Y. Tam, Zhihui Sun, Wengui Li
Summary: This study investigates the feasibility of using recycled concrete powder (RCP) as fillers in asphalt mortar to achieve sustainable and economical asphalt production. The physical properties of limestone powder (LSP) and RCP are analyzed and compared, including surface roughness, pore structures, and particle size. It is found that RCP is more effective than LSP in enhancing the performance of asphalt mortar. The interactions of RCP and LSP with asphalt mainly depend on physical interactions rather than chemical reactions. The use of RCP as fillers can improve the high-temperature rutting resistance of asphalt mortar.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Construction & Building Technology
Mingxue Ma, Vivian WY. Tam, Khoa N. Le, Robert Osei-Kyei
Summary: Effectively managing and utilizing construction and demolition waste is crucial for sustainability. Recycling waste into usable materials, like recycled aggregate, for concrete production offers both environmental and economic benefits. However, the price competitiveness of recycled concrete is a major obstacle. This study develops a system dynamics model to evaluate the dynamic effects of key factors on the price of recycled concrete and suggests short-term and long-term solutions.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Management
Ivan Polanco-Guzman, Marcos Rodriguez-Troncoso, Ahmed W. A. Hammad, Assed N. Haddad, Vivian W. Y. Tam, Diego A. Vasco
Summary: This study examines the development of a push-pull ventilation system for use in wastewater treatment. The proposed system aims to minimize H2S concentration in the settling stage of a wastewater treatment plant. Computational simulations and measurements were used to assess and improve the existing ventilation system. The results show that the improved system effectively decreases H2S concentration, meeting the regulations in Chile.
INTERNATIONAL JOURNAL OF CONSTRUCTION MANAGEMENT
(2023)
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)
