Weaken and Brake Effect of the Active Al2O3 to the Alkali-aggregate Reaction(ASR) in the Concrete
XU Hui-zhong
Abstract：From the experimental results, it is found that in the concrete system with high active Al2O3 contents, the ASR expansion happenes, but the total quantity and the continued period of it is smaller than that of the concrete with common Al2O3 contents at the same conditions. The active Al2O3 can not only weaken but also brake the ASR expansion. The reason is that the products of the ASR is the alkli-alumi-silicates but not alkali-silicates hydrogel in the concrete of richer active Al2O3 presents. This hydrogel has a high tendency of crystallization. Once the zeolite minerals are formed, their volumes will not expand or contract because of the water getting in or out. If the quantity of the Al2O3 is properly introduced, the ASR expansion can be forecast and used.
Keywords：alkali-alumi-silicate hydrogelalkali-aggregate reaction(ASR)cementconcrete
Publication Date：2000-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 213-217 )