Hydration Characteristics and Mechanical Properties of Cement-Based Materials Modified by Calcined Zeolite and Montmorillonite
Article
Qin, Lingling, Zhou, Mengya, Yan, Jiahao, Duan, Ping, Zhu, Yingcan, Chen, Wei, Zhang, Zuhua and Wang, Aiguo. 2023. "Hydration Characteristics and Mechanical Properties of Cement-Based Materials Modified by Calcined Zeolite and Montmorillonite." Journal of Renewable Materials. 11 (5), pp. 2191-2207. https://doi.org/10.32604/jrm.2023.025197
Article Title | Hydration Characteristics and Mechanical Properties of Cement-Based Materials Modified by Calcined Zeolite and Montmorillonite |
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Article Category | Article |
Authors | Qin, Lingling, Zhou, Mengya, Yan, Jiahao, Duan, Ping, Zhu, Yingcan, Chen, Wei, Zhang, Zuhua and Wang, Aiguo |
Journal Title | Journal of Renewable Materials |
Journal Citation | 11 (5), pp. 2191-2207 |
Number of Pages | 17 |
Year | 2023 |
Publisher | Tech Science Press |
Place of Publication | United States |
ISSN | 2164-6325 |
2164-6341 | |
Digital Object Identifier (DOI) | https://doi.org/10.32604/jrm.2023.025197 |
Web Address (URL) | https://www.techscience.com/jrm/v11n5/51698 |
Abstract | Montmorillonite and clinoptilolite zeolite were used as representative materials to prepare calcined clay-cement binary cementitious materials in order to study the effect of calcination treatment on the activation of clay minerals and the activity difference between layered and framed clays in this research. The influence of different calcined clay content (2%, 4%, 6%, 8%, 10%) on the fluidity, compressive strength, microstructure, phase change, and hydration heat of cement-based materials were analyzed. The calcined clay improves the fluidity of cement-based materials as compared with the uncalcined group. The addition of calcined montmorillonite (CMT) improves the development of mechanical strength, and the optimal compressive strength reaches 85 MPa at 28 days with 8% CMT. However, the activity of calcined clinoptilolite zeolite (CZL) is weak with few reaction sites, which slightly reduced the mechanical strength as compared to the blank sample. The addition of CMT changes the microscopic morphology of hydration products such as C-S-H and C-A-H, leading to the formation and transformation of ettringite in the early stage. It promotes the gradual polymerization of Si-O bonds into Si-O-Si bonds simultaneously, which accelerates the early hydration process. However, CZL acts mainly as a filling function in the cementitious system. In brief, CMT as an admixture can improve the mechanical properties of cement, but CZL has little effect. This work provides a guideline for the applications of calcined clay in cement, considering the influence of clay type on workability and mechanical strength. © 2023, Tech Science Press. All rights reserved. |
Keywords | Calcined clay; cement; montmorillonite; clinoptilolite zeolite; mechanical strength; hydration |
ANZSRC Field of Research 2020 | 401699. Materials engineering not elsewhere classified |
Byline Affiliations | China University of Geosciences, China |
Anhui Jianzhu University, China | |
Guilin University of Technology, China | |
Chang'an University, China | |
Centre for Sustainable Agricultural Systems | |
Wuhan University of Technology, China | |
Hunan University, China |
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https://research.usq.edu.au/item/z269z/hydration-characteristics-and-mechanical-properties-of-cement-based-materials-modified-by-calcined-zeolite-and-montmorillonite
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