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首页> 外文期刊>Arabian Journal for Science and Engineering >Mechanical Behaviour and Microstructural Investigation of Geopolymer Concrete After Exposure to Elevated Temperatures
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Mechanical Behaviour and Microstructural Investigation of Geopolymer Concrete After Exposure to Elevated Temperatures

机译：高温下地质聚合物混凝土的力学行为和微观结构研究

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摘要

In the present study, the mechanical properties and microstructure of the geopolymer concrete (GPC) after exposure toelevated temperatures have been investigated. The GPC and ordinary Portland cement (OPC) concrete specimens wereexposed to high temperatures and tested for the mechanical properties and microstructure. The findings of this investigationindicate that the GPC has better compressive strength, develops minor cracks, and undergoes slight damage in the massat the elevated temperature as compared to OPC concrete. For ambient-cured and heat-cured conditions, the experimentalresults of the GPC after exposure to high temperatures (600 ℃ onward) show almost the same mechanical properties, whilethe OPC concrete significantly loses the strength along with large cracks developed above 400 ℃. Moreover, the scanningelectron microscope test shows that the OPC concrete developed a lot of cracks and started losing the bonds between thematrix at 400 ℃, while the GPC holds over its strength until 800 ℃.
机译：在本研究中，已经研究了暴露在高温下的地聚合物混凝土（GPC）的力学性能和微观结构。将GPC和普通波特兰水泥（OPC）混凝土样品暴露在高温下，并测试其机械性能和微观结构。这项研究的结果表明，与OPC混凝土相比，GPC在高温下具有更好的抗压强度，产生较小的裂纹并在质量上受到轻微的破坏。对于环境固化和热固化条件，GPC暴露于高温（600℃以上）后的实验结果显示出几乎相同的机械性能，而OPC混凝土则明显丧失了强度，而在400℃以上则出现了大的裂缝。此外，扫描电子显微镜测试表明，OPC混凝土在400℃时出现大量裂纹并开始失去基体之间的结合力，而GPC则保持其强度直至800℃。

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