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微波活化煤矸石反应活性及胶凝性能

Keywords: 煤矸石,胶凝性能,微波辐照,活性

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Abstract:

研究了微波辐照对煤矸石反应活性及胶凝性能影响,通过XRD、IR等表征手段,分析了微波辐照煤矸石和煤矸石水泥的微观结构,结果表明,煤矸石经微波辐照可脱去煤矸石中的自由水和其矿物的结构水,并破坏了煤矸石矿物中牢固的Si—O和Al—O键结构,提高了SiO2、Al2O3的可溶性,提高煤矸石的反应活性和胶凝性能。煤矸石微波辐照的时间在8min较为适宜,以30%煤矸石替代水泥时,经8min微波辐照煤矸石的水泥净浆体28d抗压强度为47.6MPa,比原煤矸石的水泥净浆体高23.2MPa。

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