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A platform for research: civil engineering, architecture and urbanism
Chloride binding behaviors of alumina-rich pozzolan-lime mixtures
This work studied ARP-lime mixtures to understand the mechanisms of chloride binding capacity by alumina-rich pozzolan (ARP) in cementitious materials. Three ARPs including metakaolin (MK), fly ash (FA) and blast-furnace slag (SG) were evaluated. The chloride binding capacity, hydration products, chemically bound water, residual calcium hydroxide and alkali in pore solution were investigated. Results show that chloride binding capacity of ARP-lime mixture significantly depends on CaO to Al2O3 (C/A) ratio of the mixture. Friedel’s salt is formed at the expense of stratlingite and carboaluminate, accompanied with obvious improvement of alkali content in pore solution and consumption of calcium hydroxide. The additional alkali can improve the reaction of ARP and result in more bound water. Moreover, MK shows overwhelmingly higher chloride binding capacity than FA and SG.
Chloride binding behaviors of alumina-rich pozzolan-lime mixtures
This work studied ARP-lime mixtures to understand the mechanisms of chloride binding capacity by alumina-rich pozzolan (ARP) in cementitious materials. Three ARPs including metakaolin (MK), fly ash (FA) and blast-furnace slag (SG) were evaluated. The chloride binding capacity, hydration products, chemically bound water, residual calcium hydroxide and alkali in pore solution were investigated. Results show that chloride binding capacity of ARP-lime mixture significantly depends on CaO to Al2O3 (C/A) ratio of the mixture. Friedel’s salt is formed at the expense of stratlingite and carboaluminate, accompanied with obvious improvement of alkali content in pore solution and consumption of calcium hydroxide. The additional alkali can improve the reaction of ARP and result in more bound water. Moreover, MK shows overwhelmingly higher chloride binding capacity than FA and SG.
Chloride binding behaviors of alumina-rich pozzolan-lime mixtures
Mater Struct
Yang, Rui (author) / Wang, Yunyao (author) / Shui, Zhonghe (author) / Gao, Xu (author) / Gu, Qian (author) / Xiao, Rengui (author) / Wang, Zhiyang (author) / Yu, Rui (author)
2022-03-01
Article (Journal)
Electronic Resource
English
Chloride binding behaviors of alumina-rich pozzolan-lime mixtures
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