Effect of carbonation on the nitrogen BET surface area of hardened portland cement paste

被引：63
|
作者：
Thomas, JJ
Hsieh, J
Jennings, HM
机构：
[1] NORTHWESTERN UNIV,DEPT CIVIL ENGN,EVANSTON,IL 60208
[2] NORTHWESTERN UNIV,DEPT MAT SCI & ENGN,EVANSTON,IL 60208
来源：
ADVANCED CEMENT BASED MATERIALS | 1996年 / 3卷 / 02期
关键词：
BET; carbonation; cement; surface area;
D O I：
10.1016/1065-7355(95)00057-7
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The progressive decrease in the nitrogen BET surface area of dried hydrated portland cement paste during storage in plastic vials was found to be caused by carbonation, a reaction between the C-S-H phase and carbon dioxide in the air. A strong correlation between the surface area and the amount of carbonation as measured by thermogravimetric analysis was found. Historically, nitrogen BET values of surface area have shown great variability and low reproducibility, which has limited the value of this useful technique. The results of this work suggest that carbonation may have contributed to this problem.
引用
收藏
页码：76 / 80
页数：5
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