RETARDATION OF TRICALCIUM ALUMINATE HYDRATION BY CALCIUM-SULFATE

被引：28

作者：

COLLEPARDI, M ^{[1
]}

BALDINI, G ^{[1
]}

PAURI, M ^{[1
]}

CORRADI, M ^{[1
]}

机构：

[1] RES & DEV LABS MAC MEDITERRANEA ADDITIVI CEMENTO,TREVISO,ITALY

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1979年 / 62卷 / 1-2期

关键词：

D O I：

10.1111/j.1151-2916.1979.tb18800.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The influence of calcium sulfate on the hydration of 3CaO· Al2O3 in the presence of Ca(OH)2 was studied using conduction calorimetry, differential thermogravimetry, and X‐ray diffraction. Sodium sulfate was also used instead of calcium sulfate. A substantial retardation of tricalcium aluminate hydration in the presence of sulfate occurs only when calcium sulfate is used and enough ettringite is formed. When ettringite disappears due to the consumption of gypsum, tricalcium aluminate hydration is renewed. Sodium sulfate does not significantly retard this hydration. The results confirm the hypothesis that ettringite formation is essential for coating 3CaO·Al2O3 grains and then retarding their hydration. Copyright © 1979, Wiley Blackwell. All rights reserved

引用

页码：33 / 35

页数：3

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