Article
Construction & Building Technology
Moslih Amer Salih, Nima Farzadnia, Ramazan Demirboga, Abang Abdullah Abang Ali
Summary: Alkali-activated cement systems, known as geopolymers, are important alternatives to ordinary Portland cement (OPC) for sustainable concrete production. This study investigates the characteristics of a POFA-GGBS based geopolymer after exposure to elevated temperature, including strength, thermo-physical stability, and microstructure properties. The results show that using POFA and GGBS can produce environmentally-friendly and high-performance mortar under high temperatures.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Polymer Science
Yuto Yamazaki, Jihoon Kim, Keisuke Kadoya, Yukio Hama
Summary: The study investigated the physical and chemical changes of alkali-activated cements under accelerated carbonation conditions, revealing alterations in the C-(N)-A-S-H structure and a decrease in compressive strength. Interestingly, in sodium-rich specimens, compressive strength did not decrease during accelerated carbonation. This research is expected to contribute to the field of alkali-activated cements in the future.
Article
Construction & Building Technology
T. Revathi, N. Vanitha, R. Jeyalakshmi, Baskar Sundararaj, M. Jegan, P. R. Kannan Rajkumar
Summary: This research explores the use of alkali activated fly ash and slag binder in construction to achieve high performance and reduce adverse environmental effects. The findings suggest that this technology can contribute to mitigating climate change by reducing environmental degradation.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Engineering, Geological
Song Ding-Bao, Chen Wen-Bo, Yin Zhen-Yu, Shi Xiu-Song, Yin Jian-Hua
Summary: This paper introduces a novel mechanical-chemical combined method, called the vacuum-solidification (VS) combined method, to treat high water content dredged sediments. Model tests using vacuum-only preloading method and binder-only solidification method were conducted. Ground granulated blast-furnace slag activated by hydrated lime, magnesium oxide, or carbide slag was used as the binder. The results indicate that the VS combined method exhibits a remarkable enhancement in volume reduction efficiency and strength improvement effectiveness.
GEOTEXTILES AND GEOMEMBRANES
(2023)
Article
Construction & Building Technology
Xiangyang Kang, Yanman Li, Wei Li, Yuxian Zhou, Jiarui Cui, Baohua Cai, Yong Zi, Jing Fang, Yongqing Chen, Senlin Li, Xin Kang
Summary: With the development of urbanization, there is an increasing demand for bricks. However, traditional brick production methods result in energy consumption and environmental pollution. A study in Hebei Province, China explored the feasibility of producing alkali-activated bricks using iron ore tailings (IOT) to promote ecological restoration and sustainable development. The study successfully synthesized sustainable eco-friendly alkali-activated high-content IOT bricks and investigated the factors affecting strength. The research provided theoretical guidance for the efficient utilization of IOT in construction materials and contributed to sustainable development and environmental conservation.
Article
Engineering, Environmental
Suhail Ahmad Khanday, Monowar Hussain, Amit Kumar Das
Summary: This study investigates the viability of alkali-activated GGBS-stabilized Indian peat and finds that the UCS of peat-GGBS depends on various factors, with the optimum combination being 20% GGBS, NaOH molarity of 9, and A/B ratio of 0.7. UCS increases with curing period and decreases with organic content. Various mineral compounds responsible for strength gain were identified using XRD, with FESEM micrographs showing the formation of a smooth and dense soil-binder matrix.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2021)
Article
Construction & Building Technology
Suhail Ahmad Khanday, Monowar Hussain, Amit Kumar Das
Summary: This research investigates the impact of wetting-drying cycles on pH, electrical conductivity, unconfined compressive strength (UCS), and mass loss of different types of peat stabilized with ground granulated blast furnace slag (GGBS)-NaOH. The results show that pH and electrical conductivity decrease with increasing wetting-drying cycles. GGBS-NaOH-treated peat exhibits significantly higher UCS values compared to cement-treated peat, and microcracks are observed after wetting-drying cycles. Fourier transform infrared spectroscopy confirms the presence of physical water in cavities of treated peat after wetting-drying cycles.
ROAD MATERIALS AND PAVEMENT DESIGN
(2023)
Article
Construction & Building Technology
Yousef R. Alharbi, Aref A. Abadel, Abdulrahman A. Salah, Ola A. Mayhoub, Mohamed Kohail
Summary: The study aimed to evaluate the performance of RPC developed by AAM under different curing conditions, with findings showing that microwave curing has a good impact on AAM mixes with total cement replacement, while steam curing enhances the behaviour of RPC based cement. Additionally, when MK was used in RPC based AAM, a 30% loss in strength was observed compared to slag, and microwave curing led to a reduction in capillary pores. Moreover, the addition of extra water to improve workability weakened the geopolymerization process and increased microstructure porosity.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Muralidhar Kamath, Shreelaxmi Prashant, Mithesh Kumar
Summary: The study investigates the properties and performance of a ternary binder matrix composed of Fly Ash, Ground Granulated Blast Furnace Slag, and alkali activators. Fresh properties, mechanical properties, and microstructural properties of the ternary binder were studied, showing a homogeneous and denser microstructure with various gels developed.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Jixiang Wang, Tianyong Huang, Le Han, Fuzhu Xie, Ze Liu, Donming Wang
Summary: The characteristics of binder systems play vital roles in the properties of alkali-activated concretes. This study investigated 102 binder systems activated by diverse activators and established composition-properties contours/maps. The performances of AACs depend on the binder systems, and the complexity of alkali-activated binder systems makes it difficult to establish quantitative relationships between compositions and performances of AACs.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Multidisciplinary Sciences
William Mateus Kubiaki Levandoski, Suellen Tonatto Ferrazzo, Giovani Jordi Bruschi, Nilo Cesar Consoli, Eduardo Pavan Korf
Summary: This study evaluated the effectiveness of stabilizing iron ore tailings using an alkali-activated binder produced from sugar cane bagasse ash, hydrated eggshell lime, and sodium hydroxide solution. The study found that increasing the binder content and reducing the porosity improved the mechanical behavior of the IOTs-AAB mixture. Longer curing times also resulted in more compact structures.
SCIENTIFIC REPORTS
(2023)
Article
Construction & Building Technology
Jiale Shen, Yue Li, Hui Lin, Hongwen Li, Jianfeng Lv, Shan Feng, Junchang Ci
Summary: This paper utilized random forest, gradient boosting, and extreme gradient boosting models to predict the compressive strength of alkali-activated construction demolition waste geopolymers, with GB and XGB models outperforming RF. Factors such as liquid to solid ratio, pretreatment temperature, heat treatment time, and curing age were found to have significant impacts on the compressive strength of CDWG.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Review
Green & Sustainable Science & Technology
M. M. A. L. N. Maheepala, M. C. M. Nasvi, D. J. Robert, C. Gunasekara, L. C. Kurukulasuriya
Summary: Geopolymer based soil stabilization is a promising approach for sustainable ground treatment. The literature review shows that alkali activated binders can significantly improve the strength, swell, and durability characteristics of expansive soils. The cost of alkali activation treatment is high, but can be reduced by using cost-effective silicates. Further research is recommended to maximize the viability of this approach in field applications.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Multidisciplinary
Yanru Wang, Yubin Cao, Zuhua Zhang, Jizhong Huang, Peng Zhang, Yuwei Ma, Hao Wang
Summary: In this study, two typical binding gels in AAMs, N-A-S-H and C-(N)-A-S-H, were chemically prepared and investigated for their microstructure and composition evolution when exposed to sulfuric acid. The results showed that both gels had increased silica polymerization degree after exposure to sulfuric acid solution, with N-A-S-H gel showing faster dealumination and higher Si/Al ratio increase. The molecular framework changes caused by dealumination in the N-A-S-H gel had less effect on integrity compared to C-(N)-A-S-H gel, where coarse gypsum crystalline grains formed and led to destructive stress in hardened matrix.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Gui-Yu Zhang, Run-Sheng Lin, Xiao-Yong Wang
Summary: The ceramic and oyster farming industries generate a significant amount of waste ceramics and oyster shells. Alkali-activated materials have the potential to replace Portland cement and have less impact on the environment. Adding ceramic powder and waste oyster shell powder to these materials can alleviate landfill pressure and have important implications for environmental protection.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Civil
Mohammad Panjehpour, Nima Farzadnia, Ramazan Demirboga, Abang Abdullah Abang Ali
JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT
(2016)
Article
Construction & Building Technology
Sayed Hessam Bahmani, Nima Farzadnia, Afshin Asadi, Bujang B. K. Huat
CONSTRUCTION AND BUILDING MATERIALS
(2016)
Article
Engineering, Geological
V. Anggraini, A. Asadi, N. Farzadnia, H. Jahangirian, B. B. K. Huat
GEOSYNTHETICS INTERNATIONAL
(2016)
Article
Construction & Building Technology
Nima Farzadnia, Sayed Hessam Bahmani, Afshin Asadi, Soraya Hosseini
CONSTRUCTION AND BUILDING MATERIALS
(2018)
Review
Construction & Building Technology
Dehui Wang, Caijun Shi, Nima Farzadnia, Zhenguo Shi, Huangfei Jia, Zhihua Ou
CONSTRUCTION AND BUILDING MATERIALS
(2018)
Article
Construction & Building Technology
Caijun Shi, Dengwu Jiao, Jian Zhang, Dehui Wang, Yongjian Zhang, Nima Farzadnia, Xiang Hu
CONSTRUCTION AND BUILDING MATERIALS
(2018)
Article
Construction & Building Technology
Huang Li, Nima Farzadnia, Caijun Shi
CONSTRUCTION AND BUILDING MATERIALS
(2018)
Article
Construction & Building Technology
Zhenjun Tu, Caijun Shi, Nima Farzadnia
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2018)
Review
Construction & Building Technology
Dehui Wang, Caijun Shi, Nima Farzadnia, Zhenguo Shi, Huangfei Jia
CONSTRUCTION AND BUILDING MATERIALS
(2018)
Article
Construction & Building Technology
Jianhui Liu, Nima Farzadnia, Caijun Shi, Xianwei Ma
CEMENT & CONCRETE COMPOSITES
(2019)
Article
Construction & Building Technology
Jianhui Liu, Nima Farzadnia, Caijun Shi
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Chemistry, Physical
Moslih Amer Salih, Shamil Kamil Ahmed, Shaymaa Alsafi, Mohd Mustafa Al Bakri Abullah, Ramadhansyah Putra Jaya, Shayfull Zamree Abd Rahim, Ikmal Hakem Aziz, I. Nyoman Arya Thanaya
Summary: This research focuses on developing sustainable, high-strength self-consolidating concrete (SCC) by incorporating high levels of supplementary cementitious materials such as fly ash and GGBS. The study evaluates the fresh and hardened properties of the concrete and demonstrates the feasibility of using SCC with unconventional mixtures.
Article
Construction & Building Technology
Ning Li, Nima Farzadnia, Caijun Shi
CEMENT AND CONCRETE RESEARCH
(2017)
Review
Construction & Building Technology
Linmei Wu, Nima Farzadnia, Caijun Shi, Zuhua Zhang, Hao Wang
CONSTRUCTION AND BUILDING MATERIALS
(2017)
Article
Construction & Building Technology
Shaymaa Alsafi, Nima Farzadnia, Afshin Asadi, Bujang Kim Huat
CONSTRUCTION AND BUILDING MATERIALS
(2017)
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)