The mineralogy of the CaO-Al2O3-SiO2-H2O(CASH) hydroceramic system from 200 to 350°C

被引：93

作者：

Meller, Nicola

Kyritsis, Konstantinos

Hall, Christopher ^{[1
]}

机构：

[1] Univ Edinburgh, Ctr Sci Extreme Condit, Edinburgh EH9 3JL, Midlothian, Scotland

来源：

CEMENT AND CONCRETE RESEARCH | 2009年 / 39卷 / 01期

基金：

英国工程与自然科学研究理事会;

关键词：

Hydration products; X-ray diffraction; Oil well cement; Geothermal well cement; DICALCIUM SILICATE HYDRATE; QUARTZ PARTICLE-SIZE; CRYSTAL-STRUCTURE; PORTLAND-CEMENT; REAL STRUCTURE; OD CHARACTER; TOBERMORITE; 200-DEGREES-C; DIFFRACTION; PHASES;

D O I：

10.1016/j.cemconres.2008.10.002

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

We describe a quantitative mineralogical study of the hydrothermal reactions of an oil well cement with added silica and alumina, hydrated at temperatures from 200 to 350 degrees C. We compare the products with pure end member systems and find phase stability can be altered radically, even by small amounts of additive. The upper temperature limits of alpha-C2SH (<250 degrees C), and 1.1 nm tobermorite C5S6H5 (<300 degrees C) are increased. C8S5, reported in a cement-based system for the first time, is stable to 300 degrees C and is believed to prevent foshagite C4S3H formation below 350 degrees C. Hydrogarnet C(3)AS(3-y)H(2y) is the only aluminum bearing phase at <300 degrees C but it coexists with C(4)A(3)H(3) and bicchulite C(8)A(4)Si(4)H(4) at higher temperatures. The presence of alumina increases the stability of 1.1 nm tobermorite greatly and also to a lesser degree of gyrolite. (c) 2008 Elsevier Ltd. All rights reserved.

引用

页码：45 / 53

页数：9

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[2]

BARLETGOUEDARD V, 2003, Patent No. 03068708

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