Coupling between kinetics of dehydration, physical and mechanical behaviour for high alumina castable

被引：52

作者：

Schmtt, N

Hernandez, JF

Lamour, V

Berthaud, Y

Meunier, P

Poirier, J

机构：

[1] ENS, LMT Cachan, F-94235 Cachan, France

[2] Univ Calif Berkeley, Dept Civil & Environm Engn, Berkeley, CA 94720 USA

[3] LEFARGE Refractories, F-92120 Montrouge, France

[4] Grande Synthe, SOLLAC, F-59381 Dunkerque, France

来源：

CEMENT AND CONCRETE RESEARCH | 2000年 / 30卷 / 10期

关键词：

kinetics; shrinkage; refractory cement; thermal analysis; physical properties;

D O I：

10.1016/S0008-8846(00)00342-2

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The dehydration of a high alumina cement castable and its influence on physical and thermomechanical behaviour is studied for temperatures below 800 degreesC. The hydrated cement paste is composed of non-hydrated constituents (CA, CA(2) and C(12)A(7)) and two stable hydrates (AH(3) and C(3)AH(6)) The decomposition of the hydrates is analysed by TGA-DTA and XRD analyses. The complex chemical reactions are modelled by several kinetic laws characterising the conversion rate of the initial and intermediate formed hydrates. The variation of porosity and shrinkage of the cement paste as well as the shrinkage of the castable due to dehydration are also measured. A model, including local information at different micro-scales (constituents of the cement paste and their physical properties, volume fraction of aggregates), is proposed for both the paste and the castable. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：1597 / 1607

页数：11

共 21 条

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