Article
Construction & Building Technology
Cunyong Sun, Ju Zhang, Changwang Yan, Liqiang Yin, Xiaoxiao Wang, Shuguang Liu
Summary: In this study, coal gangue and carbide slag were efficiently utilized to prepare low-carbon cementitious material (LCCM) clinker. The LCCM showed comparable compressive strength to traditional Portland cement and had advantages in terms of CO2 emissions reduction and energy consumption.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Dedan Duan, Haibin Wu, Fang Wei, Huiping Song, Zhang Chen, Fangqin Cheng
Summary: This study explored the production of eco-friendly geopolymer grouting materials using industrial solid wastes, and evaluated their performance through systematic analysis and microscopic experiments. The results showed that these materials could serve as an alternative to cement, with good strength and characteristics.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Saif Al-Shmaisani, Ryan D. Kalina, Raissa Douglas Ferron, Maria C. G. Juenger
Summary: This study evaluated several tests for supplementary cementitious materials (SCMs) to quickly screen out inert materials, measure overall reactivity, and differentiate between different types of reactivity. The R-3 matrix and lime reactivity tests were found to be the most effective methods, but slow-reacting materials may show low reactivity in both tests. Extending the test duration can better represent material reactivity. Additionally, SCMs with higher alumina content perform better in the R-3 tests, but this creates a reactivity bias when compared to SCMs with lower alumina content. Measuring the calcium hydroxide content of R-3 pastes can differentiate between pozzolanic and hydraulic materials.
CEMENT AND CONCRETE RESEARCH
(2022)
Article
Construction & Building Technology
Yongjie Ding, Wei Wei, Jiaojiao Wang, Yanghui Wang, Yuxin Shi, Zijun Mei
Summary: This study utilizes machine learning techniques to analyze and treat different types of solid waste alkaline-activated cementitious materials. By selecting crucial chemical components as representative features, predictive models were constructed and evaluated. The support vector machine model exhibited the highest performance. Through SHAP analysis, the primary factors influencing the compressive strength of alkaline-activated cementitious materials were identified.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Chemistry, Physical
Lionel Plancher, Alexandre Pierre, Giao T. M. Nguyen, Ronan L. Hebert, Beatrice A. Ledesert, Patrick Di Martino, Yannick Melinge
Summary: Research has shown that the addition of solid-solid phase change materials (s/s PCMs) affects the rheological behavior of construction materials. The s/s PCMs have a significant impact on consistency and yield strength values. By modifying existing viscosity models, the consistency value of suspensions can be predicted, providing a new approach for the use of s/s PCMs in construction materials.
Article
Crystallography
Maleki Tagba, Shujin Li, Mingjie Jiang, Xu Gao, Mohamed Larbi Benmalek, Salima Boukour, Chuanqi Liu
Summary: The addition of silica fume and blast furnace slag improves the performance of rubberized mortars, increasing compressive strength and reducing shrinkage. The combination of rubber waste, silica fume, and blast furnace slag enhances chloride ion resistance.
Article
Construction & Building Technology
Wei Zhang, Xiansheng Hao, Chao Wei, Xiaoming Liu, Zengqi Zhang
Summary: This research aims to activate low-activity calcium silicate in converter steelmaking slag (CSS) using multiple solid wastes and increase its usage in cementitious materials. The study found that by synergistically utilizing CSS, BRM, BFS, and PFA, the low-activity calcium silicate in CSS can be activated to generate extra C-S-H gel, resulting in improved compressive strength and microstructure of the cementitious material. Additionally, consolidation of harmful elements in the material is enhanced, meeting drinking water standards.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Review
Construction & Building Technology
Fabio Friol Guedes de Paiva, Jacqueline Roberta Tamashiro, Lucas Henrique Pereira Silva, Angela Kinoshita
Summary: This paper systematically reviews the application of inorganic residues in cementitious composites, analyzing the effects and providing suggestions for future research.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Physical
Chenhui Zhu, Yuanyuan Wan, Lei Wang, Yuchen Ye, Houjun Yu, Jie Yang
Summary: Modifying alkali-activated cementitious materials using fly ash and fine sand as components can reduce CO2 emissions and save natural resources and energy. The use of fly ash instead of slag powder lowers the flexural strength of alkali slag cement, while the strength of alkali slag cement mortar is less affected by the content of fine sand, except when it exceeds 30%. The hydration degree increases with time, and the density of the slurry decreases with increased fly ash or fine sand content.
Article
Materials Science, Multidisciplinary
Fawang Zhu, Caiqian Yang, Mengyao Miao
Summary: A new type of PVA fiber reinforced cementitious composites (RCC) with super early strength was proposed. The effects of retarder, water-binder ratio (w/b), and PVA fiber on the hydration heat and mechanical properties of the composites were studied. The results showed that the retarder content influenced the hydration heat rate, while the superplasticizer affected both the heat rate and total hydration heat. The w/b ratio had a negative impact on the compressive and flexural strength. The retarder had a detrimental effect on early strength but little influence on later strength, while PVA fibers had minimal effect on the mechanical properties within a reasonable range.
Review
Green & Sustainable Science & Technology
B. S. Thomas, J. Yang, A. Bahurudeen, J. A. Abdalla, R. A. Hawileh, H. M. Hamada, S. Nazar, V Jittin, D. K. Ashish
Summary: The massive development in infrastructure has led to a rise in demand for cement, resulting in 30 billion tonnes of cement concrete being used annually. Researchers globally are exploring turning industrial waste like sugarcane bagasse ash into sustainable solutions for carbon-neutral construction practices. Studies show that incorporating sugarcane bagasse ash in concrete can enhance its performance and durability, reducing permeability and improving strength.
MATERIALS TODAY SUSTAINABILITY
(2021)
Article
Polymer Science
Qi Liu, Kang Peng, Yousef Zandi, Alireza Sadighi Agdas, Haneen M. Al-Tamimi, Hamid Assilzadeh, Ahmed Abdel Khalek Ebid, Mohamed Amine Khadimallah, H. Elhosiny Ali
Summary: This research studied the compressive strength, shrinkage, elasticity, and electrical resistivity of self-healing cementitious concrete by adding hydrogels with nano silica (NSi). The impact of different synthesized hydrogels on cement-soil pastes was examined, showing the importance of direct interactions between solid particles and hydrogels. The results were analyzed using a hybridized soft computing model, and a proper model for predicting the study's goal was determined. The experimental outcomes revealed that the addition of hydrogels led to a decrease in electrical resistivity and compressive strength, as well as a reduction in autogenous shrinkage.
Article
Construction & Building Technology
Anna Tokareva, Sinan Kaassamani, Daniele Waldmann
Summary: Construction and demolition waste can be potentially used as supplementary cementitious materials in blended cement production, which can reduce CO2 emissions by at least 10.7%. Thermal treatment of waste materials at 500 degrees C improves the mechanical properties of mortars, and pozzolanic ceramic inclusions in waste powders do not affect mortar strength at a 20% substitution rate.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Bo-Yu Deng, Ling-Zhi Li, Di Tan, Md Nasir Uddin, Zi-Wei Cai, Ke-Quan Yu
Summary: This research aims to develop a novel sustainable and cost-effective ultra-lightweight engineered cementitious composite (ULECC) using the micro-mechanical design theory. Five lightweight ECCs were designed with different lightweight fillers (LF) and replacement ratios, and three mixtures were categorized as ULECC. The impacts of LF content and curing regimes on density, mechanical, and microstructural properties were investigated. This research lays the groundwork for developing the sustainable and economical ULECC for future structural applications.
CEMENT & CONCRETE COMPOSITES
(2023)
Article
Materials Science, Multidisciplinary
Junbo Sun, Yufei Wang, Kefei Li, Xupei Yao, Binrong Zhu, Jiaqing Wang, Qianqian Dong, Xiangyu Wang
Summary: Conductive fillers play an important role in the design of electrically conductive cementitious composites, and the chemical components of the fillers influence the strength and electrical resistance of the materials. This study investigates the interfacial properties of graphite particles, steel slags, and ground granulated blast furnace slag in the composites at the molecular level, and proposes a hybrid mixing design to balance the mechanical and conductive performance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
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)