Article
Construction & Building Technology
Juanrong Zheng, Yu Tang, Hu Feng
Summary: This study investigated the use of waste gypsum in binders as well as its impact on the compressive strength development of cemented paste backfill from sulphide-rich mine tailings. The results showed that proper incorporation of waste gypsum improved particle gradation and stabilized hydration products. Additionally, it was found that the long-term strength of the cemented backfill had positive correlations with the refined pore structure and leaching solution alkalinity.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Xiangling Wang, Xiaolei Wang, Xiaoling Shi
Summary: This study explores the feasibility of using carbonate-activated binders as a substitute for ordinary Portland cement in CPB. The results show that the addition of CLDH and HM can accelerate the reaction of the binder and improve the performance of CPB samples.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Yun Zhou, Yajing Yan, Kang Zhao, Xiang Yu, Yufeng Song, Junqiang Wang, Tianyuan Suo
Summary: This study investigated the relationship between damage variables and fractal dimensions during deformation and destruction of tantalum-niobium tailing cemented paste backfill (CPB). It was found that the fractal dimensions of the CPB gradually decreased while the damage variables increased during deformation and destruction, with the stages of reduction in fractal dimensions corresponding to the stages of increase in damage variables. The fractal dimensions tended to converge to a certain value before deformation and failure of the CPB, and this convergence was different under different loading modes. Additionally, the fractal dimensions approaching a certain value were identified as a precursor to the overall macroscopic destruction of the CPB.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Tong Chen, Kang Zhao, Yajing Yan, Yun Zhou, Zhiwei He, Lijie Guo
Summary: This study investigated the mechanical properties and acoustic emission (AE) response of cemented tailings backfill (CTB) under compression-shear action. The results show that as the shear angle increases, the peak stress and plastic yield stage decrease, damage evolution is accelerated; the AE ringing counts and energy evolution exhibit specific distribution patterns; the crack evolution mode of the specimen changes with the shear angle. This has important implications for analyzing the rupture evolution of CTB under different compression-shear angles and the stability analysis of CTB backfilled goaf.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Gaili Xue, Erol Yilmaz
Summary: This research develops an efficient acoustic emission technique to study the strength, acoustic and fractal characteristics of fiber reinforced CTB materials. The study finds that polypropylene provides the best fiber reinforcement influence.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Chemical
Xiaoling Shi, Xiaolei Wang, Xiangling Wang
Summary: This study developed a new binder using thermally treated illite-containing mine tailings and steel slag as supplementary cementitious materials for cemented paste backfill. The replacement of OPC by these materials showed promising performance and lower cost.
Article
Materials Science, Multidisciplinary
Qiusong Chen, Kai Luo, Yunmin Wang, Xiaoshuang Li, Qinli Zhang, Yikai Liu
Summary: This study evaluated the mechanical performance and heavy metal retention of cemented paste backfill (CPB) in managing lead/zinc mine tailings by comparing different binder strategies. The use of bentonite effectively optimized early-age mechanical performance and retained heavy metals within the cementitious matrix. The results suggest that bentonite can be an attractive alternative for in-situ remediation of lead/zinc mine tailings to reduce environmental influence.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Environmental Sciences
Qiusong Chen, Yunbo Tao, Yan Feng, Qinli Zhang, Yikai Liu
Summary: The study found that sodium sulfate was more effective in improving mechanical performance, promoting the formation of C-S-H gel and improving pore distribution, but also led to the deposition of chloride compounds, which could affect mechanical properties.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Yuxin Hao, Xuepeng Song, Yucheng Huang, Bao Zhang, Zilin Dong, Hao Wang
Summary: This paper analyzes the damage evolution of cemented paste backfill (CPB) under different loading rates using indoor tests and numerical simulations. The moment tensor theory is introduced to simulate the acoustic emission (AE) characteristics during the loading process, and the energy conservation principle is used to explore the loading rate (LR) effect on the backfill. The results show that the uniaxial compressive strength (UCS) of the backfill first increases and then decreases as LR increases. Microcracks in the backfill slowly increase and are not significantly affected by LR until after the peak value, when they rapidly expand and propagate to form mesoscopic cracks. The temporal and spatial distribution of AE events based on the moment tensor theory are consistent with laboratory test results, and they can be divided into different periods. The characteristics of AE events are also consistent with the evolution of microcracks, with fewer events before the peak value and a significant increase in magnitude and frequency after the peak value. AE events dense zone and events with larger magnitudes increase under higher LR. Furthermore, the boundary energy and dissipation energy gradually increase, while the strain energy first increases and then decreases. These findings provide insights into the damage evolution characteristics of backfill under different LR and AE mesoscopic simulation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Construction & Building Technology
Xuepeng Song, Yuxin Hao
Summary: This study investigated the effects of stress disturbance on the mechanical properties and damage characteristics of cemented tailings backfill (CTB). The results showed that proper stress disturbance can reduce the porosity of the backfill and improve its mechanical properties. However, high-intensity stress disturbance can aggravate crack expansion and decrease stability.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Jie Wang, Jianxin Fu, Weidong Song, Yongfang Zhang, Shan Wu
Summary: The uniaxial compression tests on layered cemented tailings backfill (LCTB) revealed the failure mode, crack evolution, and damage constitutive relationship. The acoustic emission (AE) signal evolution showed an inverted U-shaped distribution, and a cusp catastrophe model was established for failure prediction. The damage constitutive model of LCTB demonstrated an accurate prediction and an S-shaped distribution of damage curves.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Baiyi Li, Jixiong Zhang, Hao Yan, Nan Zhou, Meng Li
Summary: This article investigates the thermal conductivity of gangue-cemented paste backfill through laboratory tests and analyzes the influences of mix proportion parameters and water saturation degree. The results show that the water/binder ratio significantly affects the thermal conductivity, while the cement amount has little influence. Moreover, there is a linear positive correlation between thermal conductivity and water saturation degree.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Multidisciplinary
Zeyu Li, Xiuzhi Shi, Xin Chen
Summary: The use of rice straw fiber to improve the tensile properties of cemented paste backfill can significantly increase tensile strength, but the tensile strength, strain, and percentage increase of the RSCPB do not show a monotonic pattern of variation with the RS fiber content and length during the curing period, with samples fracturing under peak stress.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Chemical
Xuepeng Song, Xiang Yu, Wenhua Zhao, Faguang Yang, Jinyan Shi, Caglar Yalcinkaya
Summary: Sulfate-rich tailings significantly affect the structural characteristics and compressive strength of cemented paste backfill. Acoustic emission monitoring reveals different damage patterns in backfill with varying sulfate content.
Article
Engineering, Chemical
Chang Yue, Xue Liguo, Zhao Zhiyun, Wang Xiangling
Summary: In this study, calcined Mg-Al-layered double hydroxides (CMA) were used to modify the properties of high-volume fly ash (FA) cement to increase its performance in cemented paste backfill (CPB). The results showed that CMA could accelerate the reaction of the binder and increase the compressive strength of CPB samples. Furthermore, the immobilization effects of Pb were enhanced by adding CMA due to its better immobilization capacity of regenerated LDHs.
Article
Construction & Building Technology
Yun Zhou, Xiang Yu, Zhongqun Guo, Yajing Yan, Kang Zhao, Junqiang Wang, Shengtang Zhu
Summary: The study aims to establish the relationship between AE parameters and mechanical failure mechanism of tantalum-niobium tailings CPB, analyze the damage-evolution process, propose a damage model based on AE characteristics, and verify its rationality. The evolution process of damaged CPB under uniaxial compression can be divided into three stages and the entire process from deformation to destruction is gradual.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Yun Zhou, Yajing Yan, Kang Zhao, Xiang Yu, Yufeng Song, Junqiang Wang, Tianyuan Suo
Summary: This study investigated the relationship between damage variables and fractal dimensions during deformation and destruction of tantalum-niobium tailing cemented paste backfill (CPB). It was found that the fractal dimensions of the CPB gradually decreased while the damage variables increased during deformation and destruction, with the stages of reduction in fractal dimensions corresponding to the stages of increase in damage variables. The fractal dimensions tended to converge to a certain value before deformation and failure of the CPB, and this convergence was different under different loading modes. Additionally, the fractal dimensions approaching a certain value were identified as a precursor to the overall macroscopic destruction of the CPB.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Kang Zhao, Ming Huang, Yun Zhou, Yajing Yan, Wenliang Wan, Fujin Ning, Zhiwei He, Junqiang Wang
Summary: The study evaluated CPB specimens comprising tantalum-niobium ore tailings and rocks to elucidate the synergistic deformation mechanism. The composite body showed similar strength to single CPB specimens, with elastic modulus increasing as strength ratio decreased. Stress-strain curves were divided into four stages, and composite body exhibited good synergy between backfill and rock deformation. Additionally, the AE characteristics of the combined body reflected the synergy of the failure of the two specimens.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Tong Chen, Kang Zhao, Yajing Yan, Yun Zhou, Zhiwei He, Lijie Guo
Summary: This study investigated the mechanical properties and acoustic emission (AE) response of cemented tailings backfill (CTB) under compression-shear action. The results show that as the shear angle increases, the peak stress and plastic yield stage decrease, damage evolution is accelerated; the AE ringing counts and energy evolution exhibit specific distribution patterns; the crack evolution mode of the specimen changes with the shear angle. This has important implications for analyzing the rupture evolution of CTB under different compression-shear angles and the stability analysis of CTB backfilled goaf.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Jian Yang, Kang Zhao, Xiang Yu, Yajing Yan, Zhiwei He, Yun Zhou, Yanming Lai
Summary: The fracture evolution characteristics of fiber-reinforced backfill were explored through the analysis of amplitude correlation dimension, RA correlation dimension, and time of acoustic emission. The study found that the fiber-reinforced backfill exhibits good fractal characteristics, with the amplitude time series showing better fractal properties compared to the RA time series.
CEMENT & CONCRETE COMPOSITES
(2022)
Article
Construction & Building Technology
Jian Yang, Kang Zhao, Xiang Yu, Yajing Yan, Zhiwei He, Yanming Lai, Yun Zhou
Summary: The crack classification of fiber-reinforced backfills was investigated using compression tests and acoustic emission analysis. A crack classification model based on the Gaussian mixed moving average filtering method was proposed and compared with the Japanese Construction Materials Standard (JCMS-III B5706) parametric analysis method. The results showed that the model is feasible and provides a new method for crack classification in mines.
CEMENT & CONCRETE COMPOSITES
(2022)
Article
Engineering, Geological
Kang Zhao, Yun Zhou, Xiang Yu, Yajing Yan, Zhiwei He, Pengfei Shan, Xiangwei Zhang, Yongbo Ji
Summary: This study investigates the damage evolution process of cemented paste backfill (CPB) under different strain-rates through compression tests, simultaneous acoustic emission, and digital image correlation monitoring tests. The results show that CPB exhibits a critical strain-rate phenomenon, where its strength decreases as the strain-rate increases. Additionally, the accumulated energy tends to concentrate in one part of the specimen, which cannot be effectively released.
GEOTECHNICAL AND GEOLOGICAL ENGINEERING
(2023)
Article
Energy & Fuels
Yanming Lai, Kang Zhao, Zhiwei He, Xiang Yu, Yajing Yan, Qiang Li, Hai Shao, Xiangwei Zhang, Yun Zhou
Summary: Uniaxial compression tests were conducted on rocks under different loading rates to analyze their effect on rock fragmentation. The fractal dimension of the macroscopic fragmentations of the rocks were then calculated by combining the fractal theory. SEM analysis revealed that the loading rate has a significant impact on the failure mode and fracture morphology of the rocks. This study provides valuable insights into the meso-rock failure mechanism and has important implications for ore rock fragmentation and rockburst prevention.
GEOMECHANICS FOR ENERGY AND THE ENVIRONMENT
(2023)
Article
Construction & Building Technology
Shenghua Yin, Yun Zhou, Leiming Wang, Jia Pan, Yongyuan Kou
Summary: The research found that increasing slurry concentration leads to a decrease in both initial and final setting times of CPB, while a decrease in tailings/CA ratio increases setting time. The effect of slurry concentration and CA dosage on the bleeding properties of backfill slurry is not significant. Increasing slurry concentration increases the amount of C-S-H gel inside the CPB, improving its mechanical behavior.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Mechanics
Yun Zhou, Shenghua Yin, Kang Zhao, Leiming Wang, Lang Liu
Summary: This study aims to understand the early fracture evolution mechanism of cemented paste backfill (CPB) at different static rates. Real-time monitoring of CPB with different static rates was conducted using acoustic emission (AE) and digital image correlation (DIC) techniques, and the effects of static rates on compressive strength and failure characteristics were analyzed. Moreover, the classification of crack types based on the relationship between AE rise time/amplitude (RA) and average frequency (AF), and the discussion of AE b-values and RA fractal dimensions for crack evolution were conducted. The strain field, displacement field, and dilation characteristics of CPB were also investigated. The study provides a theoretical basis for evaluating the structural safety of CPB.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Materials Science, Multidisciplinary
Kang Zhao, Yun Zhou, Qizheng Huang, Shenghua Yin, Yajing Yan, Jun Wu, Louyan Shen, Xiankun Zeng, Wanrong Liu
Summary: This study analyzed and discussed the early damage evolution mechanism and constitutive model of cemented superfine tailings backfill (CSTB) using acoustic emission (AE), scanning electron microscopy (SEM), and nuclear magnetic resonance (NMR) techniques. The incorporation of AEA was shown to slow down the hydration reaction in CSTB, reducing the density of its internal structure. The amount of AEA correlated with the elastic modulus and quantified the initial damage to CSTB. The addition of AEA also decreased the energy storage capacity and the energy released from CSTB.
MECHANICS OF MATERIALS
(2023)
Article
Materials Science, Characterization & Testing
Kang Zhao, Qizheng Huang, Yun Zhou, Yajing Yan, Jian Yang, Chao Ma, Qiang Nie, Jiale Chen, Yichen Shi
Summary: This study conducted uniaxial compression and simultaneous acoustic emission (AE) tests on cement superfine tailings backfill (CSTB) with different degrees of internal initial defects. The results showed that doping with a doping agent (DA) significantly enhanced the fluctuation and jump of the CSTB b-value, with two jumps observed in the loading process. The fractal characteristics of CSTB with DA doping were improved, and both the fractal dimension and the b-value showed a rapid decreasing trend before the overall unstable failure occurred. The admixture of DA increased the number of initial defects and non-homogeneity within the CSTB, resulting in somewhat random generation of 3D localization points of AE events. These findings can help better analyze the unstable failure process of backfill in mine hollow areas and carry out appropriate support work.
NONDESTRUCTIVE TESTING AND EVALUATION
(2023)
Article
Materials Science, Multidisciplinary
Kang Zhao, Yun Zhou, Shenghua Yin, Yajing Yan, Jun Wu, Hu Zhao, Shuo Wang
Summary: In this research, different contents of air-entraining agents were added during the fabrication process of cemented paste backfill to create various initial defects. The effects of these initial defects on CPB mechanics, energy dissipation, and microstructure were investigated using uniaxial compression, scanning electron microscopy, and nuclear magnetic resonance testing. The findings showed that the initial defects primarily consisted of microporosity and primary fractures, and the inclusion of air-entraining agents increased the presence of medium-sized and large-sized holes, reducing the microstructure density. Increasing initial defects resulted in decreased compressive strength and elastic modulus of the CPB and prolonged the compaction phase. Additionally, the energy storage and dissipation laws exhibited different patterns with the increase of initial defects.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Construction & Building Technology
Shenghua Yin, Yun Zhou, Xun Chen, Gongcheng Li
Summary: This study investigates the destabilization damage mechanism of cemented paste backfill and rock combination (BRC) in backfill mining and proposes a new evaluation index, Dr, based on acoustic emission (AE) characteristic parameters for predicting BRC instability failure caused by load. The study conducts experiments on various ratio combinations of BRC to obtain AE rise time/amplitude (RA) and average frequency (AF) values, and numerically calculates the Dr index using fractal theory. The results show that using Dr as an evaluation index can obtain a slightly conservative result for predicting BRC failure.
CONSTRUCTION AND BUILDING MATERIALS
(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)
