火山灰反应
氢氧化钙
煅烧
材料科学
火山灰
火山灰活动
高岭石
硅酸铝
蒙脱石
粘土矿物
硅酸铝钙
抗压强度
矿物学
化学工程
水泥
冶金
硅酸盐水泥
化学
复合材料
催化作用
工程类
生物化学
作者
Supaluk Suttikul,Kanyarat Ano,Kedsarin Pimraksa
出处
期刊:Materials Science Forum
日期:2021-06-15
卷期号:1034: 161-168
标识
DOI:10.4028/www.scientific.net/msf.1034.161
摘要
The research aimed to investigate the effect of calcium hydroxide content on pozzolanic reaction of calcined clays. Pozzolanic reaction of calcined clay was determined in terms of its mechanical properties, phase development and microstructures. Three clay minerals (two kaolinitic clays and kaolinite-montmorillonite clay) were chosen to produce pozzolanic materials via calcination at temperature of 700 °C to allow dehydroxylation of clay minerals. Ratios of calcium hydroxide to calcined clays were varied from 0.1 to 0.5. Mixing water contents or liquid to solid ratios (0.62, 0.75 and 0.80) and curing times (7 and 28 days) were also studied. It was found that calcium aluminosilicate hydrate (stratlingite) could be formed after pozzolanic reactions of all clay minerals. The development of stratlingite agreed with the strength development showing the highest compressive strength at 26 MPa (28 days) when kaolinite-montmorillonite clay was used as pozzolanic material and the ratio of calcium hydroxide to calcined clay was 0.5.
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