Formation, Interaction Mechanisms and Application of Layered Double Hydroxides in Cement Concrete
Article
Article Title | Formation, Interaction Mechanisms and Application of Layered Double Hydroxides in Cement Concrete |
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Article Category | Article |
Authors | Xu, Chuang, Zhang, Zuhua, Chen, Muchong, Shi, Caijun, Li, Ning and Liu, Yiwei |
Journal Title | Cailiao Daobao/Materials Reports |
Journal Citation | 36 (11), pp. 1-7 |
Article Number | 21020078 |
Number of Pages | 7 |
Year | 2022 |
Publisher | Cailiao Daobaoshe |
Place of Publication | China |
ISSN | 1005-023X |
Web Address (URL) | http://www.mater-rep.com/EN/10.11896/cldb.21020078 |
Abstract | Carbonization, sulfate attack and chloride-induced corrosion are the three common durability problems for concrete, and the mechanisms behind are due to the physical and chemical reactions between the cement paste or steel bar and external ions entering via concrete body. Laye-red double hydroxides (LDHs) are characterized by anion adsorption and unique layer structure, which can act as anion adsorbents in concretes and improve their durability. Although the application of LDHs in cement concrete is still at an early stage, the research on the interaction mechanisms of LDHs is relatively rich and rapidly developing. This paper provides a review on the formation mechanism of hydrotalcite-like compounds (MgAl-LDHs) and AFm phase (CaAl-LDHs) in cement concrete (including complex Portland cement and alkali-activated material systems), illustrates the interaction mechanism between LDHs and ions in concrete, and evaluates the influences of MgAl-LDHs and CaAl-LDHs on strength development and durability of cement concrete. The key problems and application prospects of LDHs as a concrete mineral additive are also proposed in this paper. |
Keywords | Anion adsorption; Concrete; Durability; Hydration; Layered double hydroxides; Mechanical property |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Funder | National Natural Science Foundation of China |
Byline Affiliations | Hunan University, China |
Library Services |
https://research.usq.edu.au/item/yy459/formation-interaction-mechanisms-and-application-of-layered-double-hydroxides-in-cement-concrete
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