Article
Chemistry, Physical
Jun Chang, Jixin Zhang, Yanchen Yuan, Kai Cui
Summary: This study investigated the effect of iron phase content on the calcination and properties of clinker and barium calcium sulfoaluminate cement. Proper amount of iron phase can accelerate mineral ions migration and promote the formation and growth of minerals.
Article
Construction & Building Technology
Yongbo Huang, Dong Dong, Xuecheng Wang, Zixu Zhang, Piqi Zhao, Na Cui, Lingchao Lu
Summary: Ternesite-calcium sulfoaluminate (TCSA) cement was produced using phosphogypsum, and the effects of P2O5, F, and CaSO4 content on the coexistence of sulfoaluminate and ternesite were investigated. The study found that the coexistence of sulfoaluminate and ternesite could be achieved under certain conditions of P2O5, F, and CaSO4.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Jianfeng Wang, Yan Wang, Hui Liu, Lei Chang, Hui Wang, Yali Wang, Suping Cui
Summary: The effects of disodium EDTA (EDTA-2Na) on the hydration and mechanical properties of calcium sulphoaluminate-belite cement (CSBC) were studied. EDTA-2Na addition resulted in visible changes in CSBC strength development. At 7 d and 28 d, 0.50% EDTA-2Na significantly enhanced the compressive strength by 18% and 23% compared to the blank specimens, while reducing the strength at 8 h and 1 d. The content of the main hydration product (AFt) played a crucial role in the strength development.
CEMENT AND CONCRETE RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Feihan Jia, Hao Sun, Linyu Yu, Xiaolei Lu, Yiming Zhou, Mohamed Elchalakani, Peng Du
Summary: The preparation of ferrite-rich sulfoaluminate cement using red mud and desulfurization gypsum is feasible and can exhibit rapid mechanical strength development in the early and continuous development in the later stage.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Construction & Building Technology
Meng Dong, Jiang -Shan Li, Lei Lang, Xin Chen, Jiaxu Jin, Wei Ma
Summary: This study experimentally investigated the effect of thermal modified phosphogypsum (MPG) on the engineering properties of calcium sulphoaluminate cement (CSC), including setting time, compressive strength, and fluidity index. The micro-mechanisms of CSC incorporating MPG under different thermal treatment temperatures were also analyzed. The results showed that the optimum content of phosphogypsum was 10% and the thermal modification temperature was 300 degrees C, which achieved the maximum compressive strength of 41.59 MPa. The key findings of this study can achieve the double benefits of utilizing waste phosphogypsum and improving the engineering properties of CSC.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Luis Urbano Durlo Tambara Junior, Geannina Terezinha dos Santos Lima, Laura Silvestro, Artur Spat Ruviaro, Philippe Jean Paul Gleize, Afonso Rangel Garcez de Azevedo
Summary: This study evaluated the influence of different polycarboxylate-based superplasticizer (SP) contents on PC and PC-CSA binary cement pastes. The results showed that the incorporation of SP reduced the dynamic yield stress of PC pastes, but progressively increased the yield stress of PC-CSA systems. The increase in SP content increased the main heat flow peak of PC-CSA pastes, although it did not significantly affect the cumulative heat after 160 hours of hydration. XRD and FTIR analysis confirmed higher ettringite contents in the binary systems and the presence of carboaluminates phases after 7 days of hydration in both PC and PC-CSA pastes, and hemicarboaluminate in PC-CSA pastes. CSA incorporation reduced the cumulative pore volume by up to 32% compared to PC pastes, while the evaluated SP content did not significantly affect the porosity of PC-CSA pastes.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Shuang Wu, Xingliang Yao, Changzai Ren, Yonggang Yao, Chao Zhang, Changliang Wu, Wenlong Wang
Summary: The study developed a method for preparing iron-rich calcium sulfoaluminate (IR-CSA) cement using gypsum as the source of calcium oxide, and investigated the effects of iron on various aspects of the cement preparation process. The presence of iron was found to enhance crystal growth and microstructure densification in the clinker, and its incorporation into mineral phases was studied. The feasibility of using phosphogypsum as the sole calcium oxide source for IR-CSA cement preparation was also evaluated for engineering applications, showing potential for reducing aluminum usage and promoting recycling of iron-containing industrial waste materials.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Christian Pichler, Lukas Perfler, Kathrin Kaufmann, Thomas Bidner, Roman Lackner
Summary: The reaction kinetics of commercial CSA cement was studied using heat flow calorimetry, revealing different behavior when tartaric acid was used as a retarding agent. Calorimetric data was used to determine heat of hydration and chemical affinity of the binder mixture, while ultrasonic velocity measurements provided stiffness gain information of paste samples. The thermo-chemical analysis scheme allowed for modeling of temperature and hydration history, yielding intrinsic material function of stiffness evolution in hydrating CSA paste. Robustness of the analysis scheme was demonstrated through comparison of measured and simulated temperature evolution, potentially aiding in systematic assessment and optimization of heat/mechanical evolution in CSA binder systems under various conditions.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Chemistry, Physical
Xuemei Chen, Jun Li, Zhongyuan Lu, Yunhui Niu, Jun Jiang, Yigang Xu, Wen Zhong
Summary: Increasing the content of brownmillerite in BBSC can decrease hydration exothermic rate and delay the formation of AFt at early stages. It can also promote the formation of C(2)AS·8H(2)O, with higher brownmillerite content leading to earlier formation of C(2)AS·8H(2)O. The presence of more brownmillerite may change the morphology of formed AFt, with iron-enriched grass-shaped AFt being the main hydration product in BBSC with higher brownmillerite content.
Article
Thermodynamics
Fanghui Han, Hongbo Zhang, Ziyi Li, Zhiming Pang
Summary: The effects of ordinary limestone powder (OLP) and ultrafine limestone powder (UFLP) on the fluidity, setting time, compressive strength, hydration heat and microstructure of calcium sulfoaluminate cement (CSA) were investigated. The fine limestone powder reduced the fluidity and setting time of CSA. Increasing the fineness of limestone powder improved the growth rates of strength and chemical bound water content, resulting in higher compressive strength and chemical bound water content. The hydration of CSA was dramatically promoted by adding UFLP, with a stronger effect at higher dosages, although cumulative hydration heat was reduced. The microstructure of hardened CSA paste became denser with the addition of UFLP. However, a higher content and finer limestone powder led to a larger amount of hemicarbonate and a minor amount of monosulfate phase (AFm). The poor bond between limestone powder and the surrounding hydrates resulted in a lower compressive strength in CSA mortar containing a larger amount of limestone powder.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Construction & Building Technology
Leyang Lv, Shitao Luo, Branko Savija, Hongzhi Zhang, Lin Li, Tamon Ueda, Feng Xing
Summary: This study investigated the effects of particle size distribution (PSD) on the pre-hydration behavior and properties of CSA cement. It was found that pre-hydration at relative humidity higher than 75% had detrimental effects on the hydraulic activity and strength gain of CSA cement. Coarser CSA cement showed better resistance to pre-hydration, as well as higher compressive strength and lower porosity.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Yue Zhou, Zhongping Wang, Zheyu Zhu, Yuting Chen, Kai Wu, Haoliang Huang, Kasimova Guzal Anvarovna, Linglin Xu
Summary: Calcium sulfoaluminate (CSA) cement-calcined clay blends are promising cementitious materials with lower CO2 footprint. The addition of metakaolin and calcined montmorillonite influences the hydration of CSA cement, affecting setting time, physical strength, drying shrinkage, and microstructure of hydrates. Metakaolin reduces drying shrinkage while calcined montmorillonite accelerates initial heat evolution and setting.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Construction & Building Technology
Vaishnav Kumar Shenbagam, Rolands Cepuritis, Piyush Chaunsali
Summary: The study investigates the influence of externally available calcium sulfate on the expansion characteristics of concrete, finding that the expansion of blended cement is related to the concentration of gypsum in the exposure solution and the dosage of CSAB, with the stiffness of the matrix playing a role in the resultant expansion.
CEMENT & CONCRETE COMPOSITES
(2021)
Article
Construction & Building Technology
Shiyu Zhang, Dongming Wang, Dinghua Zou
Summary: The production of calcium sulfoaluminate (CSA) cement from solid industrial wastes is environmentally friendly and can reduce waste accumulation. However, the carbonation rate of CSA cement is faster than that of portland cement. In this study, silane was used to improve the carbonation resistance of CSA cement prepared from solid industrial wastes. The results showed that the carbon chain length of the silane affected the carbonation resistance of the CSA cement mortar, with longer chains accelerating carbonation and shorter chains promoting resistance to carbonation.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2023)
Article
Chemistry, Physical
Guangxiang Ji, Hafiz Asad Ali, Keke Sun, Dongxing Xuan, Xiaoqin Peng, Jingjun Li
Summary: Blending OPC with CSA cement can adjust the properties of cement for specific applications. In this study, CSA cement was used as a shrinkage-compensating admixture to improve the hydration behavior and performance of OPC. The experimental results showed that incorporating CSA cement delayed the hydration process of C3S, shortened the induction periods of the blended cement, and improved the early compressive strength and drying shrinkage of the OPC.
Article
Construction & Building Technology
Mingxu Chen, Lei Yang, Yan Zheng, Yongbo Huang, Laibo Li, Piqi Zhao, Shoude Wang, Lingchao Lu, Xin Cheng
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Construction & Building Technology
Lei Yang, Min Jing, Lingchao Lu, Xiaohong Zhu, Piqi Zhao, Mingxu Chen, Laibo Li, Jingyu Liu
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
Mingxu Chen, Lei Yang, Yan Zheng, Laibo Li, Shoude Wang, Yongbo Huang, Piqi Zhao, Lingchao Lu, Xin Cheng
Summary: In this study, PP and PVA fibers were introduced into 3D printed CSACCs to improve the stable shape retention and mechanical strength by controlling rheological parameters. The experimental results showed that the fibers enhanced the elastic modulus, yield stress, and thixotropy of CSACCs. The radar map revealed the relationship between rheological parameters and structure deformation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Construction & Building Technology
Jiabin Xu, Mingxu Chen, Zhihui Zhao, Laibo Li, Shoude Wang, Yongbo Huang, Piqi Zhao, Chenchen Gong, Lingchao Lu, Xin Cheng
Summary: By adding different admixtures to modify 3D printed white Portland cement-based materials (WPCMs), this study found that hydroxypropyl methylcellulose (HPMC) and ethylene-vinyl acetate (EVA) can significantly improve their static yield stress, while calcium formate (CF) dosage of 0-1% can have the opposite effect, and increasing the content of HPMC can establish a good printed structure. Response surface methodology (RSM) was used to investigate the properties of WPCMs with hybrid admixtures, and the optimal dosage of hybrid admixtures was determined to achieve controllable rheology and stable printed structure.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Zhihui Zhao, Mingxu Chen, Jiabin Xu, Laibo Li, Yongbo Huang, Lei Yang, Piqi Zhao, Lingchao Lu
Summary: The study investigated the effects of mix design on the performance of magnesium potassium phosphate cement composites (MPCCs) for 3D printing, focusing on initial setting time and rheological properties. By optimizing the mix design, the initial setting time was prolonged and the compressive strength was improved.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jun Xu, Lingchao Lu, Guangbin Duan, Weilin Zhao
Summary: Three eco-friendly reduced graphene oxides (rGOs) were obtained using beer, wine and cocoa as reducing agents. The properties of the rGO nanofluids were found to be influenced by the type of base fluids and nanoparticles. Among the rGO nanofluids, those prepared using wine showed excellent stability and thermal conductivity.
Article
Construction & Building Technology
Lu Liu, Piqi Zhao, Chen Liang, Shoude Wang, Yongbo Huang, Na Cui, Lingchao Lu
Summary: This study investigated the effect of hydrophobic flake as a functional filler on the polymer-modified cement-based coating. The results showed that the hydrophobic flake improved the protection performance and durability of the coating.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
Lei Yang, Mingxu Chen, Zeyu Lu, Yongbo Huang, Jiaao Wang, Lingchao Lu, Xin Cheng
CEMENT & CONCRETE COMPOSITES
(2020)
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)
