SEM/EDX characterization of the hydration products of belite cements from class C coal fly ash

被引：26

作者：

Goni, Sara ^{[1
]}

Guerrero, Ana ^{[1
]}

机构：

[1] CSIC, Inst Ciencias Construct Eduardo Torroja, Serrano Galvache, Madrid 28033, Spain

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2007年 / 90卷 / 12期

关键词：

D O I：

10.1111/j.1551-2916.2007.01996.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：

This paper presents the microscopic characterization of two types of fly ash belite cements and their hydration products by means of scanning electron microscopy, energy-dispersive X-ray microanalysis, and X-ray diffraction analysis. The cements were obtained from ASTM class C coal fly ash by the hydrothermal-calcination route in water (FABC-2-W) and NaOH 1M solution (FABC-2-N). The hydration was studied during a period of 180 days at 21 degrees C and >95% RH. The results showed significant incorporation of aluminum (Al) into the C-S-H gel and other minor elements, with a presumable composition close to that of aluminum-tobermorite. The C-S-H composition of the FABC-2-W is more stable over the hydration time than that of the FABC-2-N cement. Portlandite is scarcely formed during hydration.

引用

页码：3915 / 3922

页数：8

共 27 条

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