Article
Construction & Building Technology
Kaiqiang Liu, Junjie Yu, Yang Xia, Haiping Wang, Dekun Wang, Jiang Du, Yongding Tian, Xingguo Zhang
Summary: This study investigated the hydration kinetics and microstructure of oil-well cement slurry in the early hydration stage. It revealed the hydrostatic pressure reduction mechanism and the quantitative relationship between the hydration kinetics and hydrostatic pressure. The results showed that the hydrostatic pressure of the cement slurry changed according to the Arrhenius equation. The microstructure of the slurry developed from suspension particles to a particles framework bonded to external interfaces. The hydration products strengthened the framework and decreased the porosity, pore size, and connectivity of the slurry, leading to the loss of hydrostatic pressure. Hydration kinetics indicated that the hydrostatic pressure changed linearly with hydration heat increments. A prediction method using hydration heat increments was developed to successfully predict the hydrostatic pressure of oil-well cement slurry.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Suhua Ma, Ruben Snellings, Xuerun Li, Xiaodong Shen, Karen L. Scrivener
Summary: The addition of ye'elimite can accelerate early strength development in alite-ye'elimite clinker, with a significant impact on hydration in the first 24 hours. However, its influence on hydration kinetics and products diminishes over time.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Congqi Luan, Yong Zhou, Yongyi Liu, Zunchao Ren, Jinbang Wang, Lianwang Yuan, Shuang Du, Zonghui Zhou, Yongbo Huang
Summary: The study investigated the impact of clinker mineral components and nanomaterials on the performance of cement composites. Results showed that the addition of nano-particles shortened setting time, enhanced strength, and optimized microstructure. Different nano-materials had varying effects on HCSC, with nano-SiO2 exhibiting pozzolanic activity, while nano-CaCO3 and nano-TiO2 promoted hydration via nucleation effects.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Wei Gong, Nan Wang, Na Zhang
Summary: This study investigated the influence of fly ash and metakaolin on magnesium oxychloride cement (MOC) properties, finding that fly ash can delay setting and slow down hydration, while metakaolin has the opposite effect. Compound addition is beneficial for a richer hydration product formation, but leads to decreased compressive strength, mass change, and compactness.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Xuemei Chen, Yuanzheng Liu, Qihong Wu, Yi Ding, Qingyuan Wang, Wenjie Tang, Baiyu Zhu
Summary: This paper investigates the physical and chemical characteristics of beta-hemihydrate phosphogypsum, finding that it has an acidic hydration environment and co-crystallized phosphate. The optimal admixtures for this material are protein retarder and polycarboxylate superplasticizer, and an increase in particle fineness improves hydration and mechanical strength. HPG shows comparable strength and hydration mechanism with HFG and HNG.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Construction & Building Technology
Tingjie Huang, Qiang Yuan, Shenghao Zuo, Youjun Xie, Caijun Shi
Summary: The addition of gypsum accelerates the development of elasticity in the early stage of cement setting, but delays further improvement of elasticity in the later stage.
CEMENT AND CONCRETE RESEARCH
(2022)
Article
Construction & Building Technology
Shuai Bai, Xinchun Guan, Hui Li, Jinping Ou
Summary: The early hydration and microstructure of cement paste with nanocellulose (CNC) at different water-cement ratios were studied. The results showed that CNC can delay the ending time of the induction period and acceleration period, reduce the main exothermic peak, and inhibit early hydration. The inhibition effect becomes more significant with the increase of CNC dosage. CNC also inhibits the formation of ettringite and portlandite, and delays the formation and deposition of early hydration products. The inhibition effects of CNC on early hydration exotherms and hydration products differ at low and high water-cement ratios.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Qian Zhang, Congqi Luan, Chaoqun Yu, Yongbo Huang, Zonghui Zhou
Summary: Carbon black (CB) has a promising prospect for producing multifunctional building materials. However, there is a lack of systematic research on the influence of CB on hydration and microstructure, with existing literature mainly focusing on electrical properties. This study thoroughly examined the variations in fluidity, strength, hydration, porosity, and microstructure of CB-cement materials. The findings revealed that CB has a clear negative effect on fluidity and early flexural strength, but proper CB increases compressive strength, and optimizes pore structure and the interfacial transition zone.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Kai Cui, Jun Chang
Summary: This study investigates the effects of multi-layer graphene (MLG) on the hydration, microstructure, and mechanical properties of ultra-high-performance concrete (UHPC) prepared with sulphoaluminate cement. The results show that adding MLG can significantly enhance the macro performance of UHPC, improving its flexural strength and compressive strength at different curing times. The study also reveals the reinforcing mechanism of MLG, which includes filling pores and preventing micro-crack extension.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Kai Cui, Jun Chang, Mohanad Muayad Sabri Sabri, Jiandong Huang
Summary: This study investigated the effect of graphene nanoplates (GNPs) on the hydration process and products of sulfoaluminate cement (SAC). The results showed that GNPs can accelerate SAC hydration, promote the formation of hydration products, and improve the mechanical properties of the cement matrix.
Article
Construction & Building Technology
Priscillia Laniesse, Celine Cau Dit Coumes, Gwenn Le Saout, Adel Mesbah
Summary: This study investigated the effects of boron and aluminum on the mixing solution of wollastonite-based brushite cement. It found that boron slows down setting and reduces heat release, but results in poor compressive strength, while aluminum improves mechanical properties but can cause rapid setting. A joint addition of boron and aluminum optimizes the material properties in fresh and hardened states.
CEMENT AND CONCRETE RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Jielu Zhu, Qi Li, Xianglan Li, Yanhua Zhou, Fanghua Liu, Junwei Song
Summary: This study demonstrates that coupled mechanical-chemical activation can significantly enhance the hydration activity of copper slag powder. Increasing the grinding time can increase the specific surface area and particle size distribution advantages of the copper slag powder. The chemical activator CaO further stimulates the hydration activity of copper slag powder and improves the compressive strength of composite cement.
APPLIED SCIENCES-BASEL
(2022)
Article
Construction & Building Technology
Shenyang Ouyang, Yanli Huang, Nan Zhou, Junmeng Li, Huadong Gao, Yachao Guo
Summary: The study investigated the early hydration characteristics and strength evolution of sand-based cemented paste backfill materials. It showed that the hydration process can be divided into several stages, leading to the formation of specific hydration products and an increase in mechanical strength and elastic modulus over curing age. The study also constructed hydration models for the materials, providing insights into their hydration behavior.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Wenjie Ge, Zhiwen Zhang, Ashraf Ashour, Wei Li, Hongbo Jiang, Yuexiang Hu, Huaguo Shuai, Chuanzhi Sun, Shengcai Li, Yan Liu, Dafu Cao
Summary: This study comprehensively investigates the effects of active admixtures, such as silica fume, slag, and fly ash, on the hydration characteristics, hydration products, and microstructure of Reactive Powder Concrete (RPC). The results show that partly replacing cement with active admixtures can reduce the initial hydration reaction rate and improve the compressive and flexural strength of RPCs. RPCs made of a cement-silica fume mixture exhibit the best macroscopic properties. The findings of this study are important for the production of low-cost and environmentally-friendly RPCs, as well as the wider application of ultra-high performance concrete (UHPC) in engineering structures.
JOURNAL OF BUILDING ENGINEERING
(2023)
Review
Construction & Building Technology
Fadi Althoey, Osama Zaid, Rebeca Martinez-Garcia, Fahad Alsharari, Mohd Ahmed, Mohamed M. Arbili
Summary: Concrete significantly impacts the atmosphere due to the high carbon dioxide emissions in its production process. Adding nano-silica to concrete can improve its strength, durability, and microstructural characteristics. Around 2-4% of nano-silica is suitable for enhancing the physical and mechanical properties of different types of concrete.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Construction & Building Technology
Caijun Shi, Xiang Hu, Xiaogang Wang, Zemei Wu, Geert de Schutter
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2017)
Article
Construction & Building Technology
Zemei Wu, Kamal Henri Khayat, Caijun Shi
CEMENT & CONCRETE COMPOSITES
(2018)
Article
Construction & Building Technology
Zemei Wu, Caijun Shi, Kamal Henri Khayat, Linbin Xie
CONSTRUCTION AND BUILDING MATERIALS
(2018)
Review
Engineering, Multidisciplinary
Linmei Wu, Peng Liu, Zuhua Zhang, DeJu Zhu, Hao Wang
INTERNATIONAL JOURNAL FOR MULTISCALE COMPUTATIONAL ENGINEERING
(2018)
Article
Green & Sustainable Science & Technology
Yi Liu, Chunjie Yan, Junjie Zhao, Zuhua Zhang, Hongquan Wang, Sen Zhou, Linmei Wu
JOURNAL OF CLEANER PRODUCTION
(2018)
Article
Construction & Building Technology
Jianan Qi, Zemei Wu, Zhongguo John Ma, Jingquan Wang
CONSTRUCTION AND BUILDING MATERIALS
(2018)
Article
Computer Science, Artificial Intelligence
Huachao Li, Xiantang Zhang, Dan Li, Linmei Wu, Wenle Gao, Hongmin Zhou
JOURNAL OF INTELLIGENT & FUZZY SYSTEMS
(2019)
Article
Engineering, Civil
Xiaoluo Cao, Linmei Wu, Zhenming Li
ENGINEERING STRUCTURES
(2020)
Review
Construction & Building Technology
Min Zhou, Zemei Wu, Xue Ouyang, Xiang Hu, Caijun Shi
Summary: A highly efficient mixture design for concrete should balance workability, strength, durability, economic efficiency, and sustainability. Ultra-high-performance concrete (UHPC) requires a thoughtful approach that integrates different design methods to meet specific requirements efficiently.
CEMENT & CONCRETE COMPOSITES
(2021)
Review
Construction & Building Technology
Linmei Wu, Nima Farzadnia, Caijun Shi, Zuhua Zhang, Hao Wang
CONSTRUCTION AND BUILDING MATERIALS
(2017)
Article
Construction & Building Technology
Zemei Wu, Caijun Shi, Wen He, Dehui Wang
CEMENT & CONCRETE COMPOSITES
(2017)
Article
Construction & Building Technology
Zemei Wu, Caijun Shi, Wen He
CONSTRUCTION AND BUILDING MATERIALS
(2017)
Article
Construction & Building Technology
Xianwei Ma, Jianhui Liu, Zemei Wu, Caijun Shi
CONSTRUCTION AND BUILDING MATERIALS
(2017)
