1998•Unpublished venueRequires access
MEASURES FOR IMPROVING THE PROPERTY OF FLY ASH CEMENT
Pan Ganghua, Aiqin Wang, Wei Sun, Chengzhi Zhang, Zhong Baixi, Nanru Yang
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Abstract
The hydration process of fly ash cement includes two different reactions, one is the hydration of clinker and another is the pozzolanic reaction between activated component in fly ash and calcium hydroxide. Thus there are two kinds of patterns to promote the hydration of fly ash cement: one is promoting the pozzolanic reaction between fly ash and calcium hydroxide, and the other is promoting the hydration of clinker. This paper analyzes the features of every effect promoting the hydration of fly ash cement, and indicates that if the measures promoting the pozzolanic reaction is taken, its effectiveness is marked when the content of fly ash is big, and the effectiveness is more marked at later age than that at early age; but if the measures promoting the hydration of clinker is taken, its effectiveness is marked when the content of fly ash is small. According to these features, the effect of two sorts of activator and milling on the property of fly ash cement is analysed. On the basis of the analysis, it is indicated that the effects on both the hydration of clinker and pozzolanic reaction of fly ash must be considered at the same time to improve the property of fly ash cement.