Effects of Limestone Powder in Manufactured Fine Aggregate on Early Hydration Process and Types of Cement Hydrates

被引：1

作者：

Cai, Ji-Wei ^{[1
,2
]}

Zhang, Shao-Bo ^{[1
]}

Zhou, Ming-Kai ^{[2
]}

Li, Bei-Xing ^{[2
]}

机构：

[1] Hebei Polytech Univ, 46 Xinhua Western Rd, Tangshan 063009, Hebei, Peoples R China

[2] Wuhan Univ Technol, Wuhan 430070, Peoples R China

来源：

ULTRA-HIGH-PUMPABILITY AND HIGH PERFORMANCE CONCRETE TECHNOLOGY | 2009年 / 405-406卷

关键词：

manufactured fine aggregate; limestone powder; crusher dust; early hydration process; cement hydrates; STONE POWDER; CONCRETE;

D O I：

10.4028/www.scientific.net/KEM.405-406.262

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The crusher dust in Manufactured fine aggregate (MFA), e.g. limestone powder in calcareous MFA, constitutes micro gradation of the aggregate and suitable content of crusher dust in MFA can improve the properties of concretes. In this paper, early hydration processes of samples substituting limestone powder and fly ash for part of cement are analyzed, and effects of limestone powder on cement hydrates are studied through experiment of mortar prepared with MFA partially replaced by limestone powder and fly ash. The result reveals that both the dormant period and acceleration period of hydration ended earlier in the samples substituting limestone powder for part of cement, and amount of crystals of calcium hydroxide and hydrated calcium carboaluminate increases in hardened paste in the samples substituting limestone powder for part of MFA, i.e. calcareous dust (limestone powder) in MFA can stimulate and enhance hydration of cement.

引用

页码：262 / +

页数：2

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