中南大学学报（英文版）
中南大學學報（英文版）
중남대학학보（영문판）
JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY(ENGLISH EDITION)
2015年
9期
3633-3640
,共8页
刘泽%邵宁宁%秦俊峰%孔凡龙%王春雪%王栋民
劉澤%邵寧寧%秦俊峰%孔凡龍%王春雪%王棟民
류택%소저저%진준봉%공범룡%왕춘설%왕동민
foam geopolymer%circulating fluidized bed combustion fly ash%thermal analysis%microstructure%strength
A comparative study of the influence of elevated temperature on foam geopolymer using circulating fluidized bed combustion fly ash (CFA) was reported. Foam geopoymers were prepared with different amounts of foam agent and different SiO2/Al2O3 molar ratios of 3.1, 3.4, and 3.8. The mechanical, thermo-physical properties and microstructure of the foam geopolymers before and after exposure to elevated temperature of 800, 1000, and 1200 °C were investigated. The specimen with SiO2/Al2O3 molar ratio of 3.8 exhibits the highest compressive strength, better microstructure and dimension stability before and after firing. Carnegeite, nepheline, and zeolite crystalline phases appearing after exposure may contribute to the good post-exposure strength. Low weight foam geopolymer using CFA can increase strength and maintain higher stability as high as 1000 °C.
