Hydration of ternary cementitious system: Portland cement, fly ash and silica fume

被引：0
|
作者：
N. B. Singh
Meenu Kalra
Mukesh Kumar
Sarita Rai
机构：
[1] Sharda University,Research and Technology Development Centre
[2] JK Lakshami Cement Ltd.,Chemistry Department
[3] Dr. Harisingh Gour University,undefined
来源：
Journal of Thermal Analysis and Calorimetry | 2015年 / 119卷
关键词：
Portland cement; Fly ash; Silica fume; Heat of hydration; Compressive strength;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Hydration of ternary OPC–FA–SF cements has been studied using number of techniques. Heat of hydration studies were made with the help of TAM AIR calorimeter, and it was found that fly ash retarded the hydration of OPC and reduced the total heat evolution. However, fly ash and silica fume together improved the heat evolution, but the values were lower than that of OPC. Differential scanning calorimetric studies of cements hydrated for 28 days were made, and it was found that Ca(OH)2 produced during the hydration of OPC reacted with fly ash and silica fume. SEM pictures of hydrated cements were recorded. The results have shown that silica fume accelerates the hydration and minimizes the deficiencies of fly ash blended cement. Mechanism of hydration has been proposed.
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页码：381 / 389
页数：8
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