An investigation on alkali-activated Egyptian metakaolin pastes blended with quartz powder subjected to elevated temperatures
作者： Alaa M. Rashad , Ahmed A. Hassan , Sayieda R. Zeedan
DOI: 10.1016/J.CLAY.2016.07.002
关键词:
摘要: Abstract In this study, the possibility of using quartz powder (QP) to improve workability as well compressive strength alkali-activated metakaolin (AAMK) paste before and after exposure elevated temperatures has been investigated. Metakaolin (MK) was partially replaced with QP at levels ranging from 0% 30% an increment 5%, by weight. After curing, specimens were exposed different 400 °C 1000 °C interval 200 °C for 2 h. Weight being thoroughly explored. The various decomposition phases formed upon identified X-ray diffraction (XRD)-phase characterizations thermogravimetric (TGA)-thermal characterizations. microstructure hydration products determined scanning electron microscopy (SEM) energy-dispersive spectroscopy (EDS). results showed that increased increasing content. geopolymer formulations developed in study appeared promising candidates high-temperature applications refractory fire resistant.
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