Studies on the carboaluminate formation in limestone filler-blended cements

被引：477

作者：

Bonavetti, VL ^{[1
]}

Rahhal, VF ^{[1
]}

Irasser, EF ^{[1
]}

机构：

[1] Natl Univ Buenos Aires Ctr State, Dept Civil Engn, Olavarria, Argentina

来源：

CEMENT AND CONCRETE RESEARCH | 2001年 / 31卷 / 06期

关键词：

blended cement; filler; hydration products; sulfoaluminate; X-ray diffraction;

D O I：

10.1016/S0008-8846(01)00491-4

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Carboaluminates are hydration products of limestone-blended cements and they compete with monosulfoaluminate stability and ettringite transformation. In this paper a study about the hydration of pure C(3)A phase with CaCO3 in the presence or not of gypsum and in a calcium hydroxide solution is related to the hydration products of portland and limestone-blended cements. Results show the formation of monocarboaluminates in systems containing C(3)A and CaCO3 while the tricarboaluminate was not found. Calcium hydroxide intervenes in these systems to form a calcium hemicarboaluminate hydroxide. In limestone-blended cements, calcium monocarboaluminate is immediately detected after hydration bt gun and the transformation of monosulfoaluminate to monocarboaluminate occurs at 28 days while the conversion of ettringite to monosulfoaluminate is deferred. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：853 / 859

页数：7

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