Mechanical Behaviour and Microstructural Investigation of Geopolymer Concrete After Exposure to Elevated Temperatures

被引:0
|
作者
Amer Hassan
Mohammed Arif
M. Shariq
机构
[1] Aligarh Muslim University,Department of Civil Engineering, Zakir Husain College of Engineering and Technology
[2] Qassim University,Department of Civil Engineering, College of Engineering
关键词
Alkaline solution; Geopolymer concrete; Fire resistance; Elevated temperature; Fly ash;
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学科分类号
摘要
In the present study, the mechanical properties and microstructure of the geopolymer concrete (GPC) after exposure to elevated temperatures have been investigated. The GPC and ordinary Portland cement (OPC) concrete specimens were exposed to high temperatures and tested for the mechanical properties and microstructure. The findings of this investigation indicate that the GPC has better compressive strength, develops minor cracks, and undergoes slight damage in the mass at the elevated temperature as compared to OPC concrete. For ambient-cured and heat-cured conditions, the experimental results of the GPC after exposure to high temperatures (600 °C onward) show almost the same mechanical properties, while the OPC concrete significantly loses the strength along with large cracks developed above 400 °C. Moreover, the scanning electron microscope test shows that the OPC concrete developed a lot of cracks and started losing the bonds between the matrix at 400 °C, while the GPC holds over its strength until 800 °C.
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页码:3843 / 3861
页数:18
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