文章基本信息

标题：Behavior of combined fly ash/GBFS-based geopolymer concrete after exposed to elevated temperature
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作者：Ren Junru ; Chen Huiguo ; Dai Ruixi 等
期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：267
期号：3
页码：1-10
DOI：10.1088/1755-1315/267/3/032056
出版社：IOP Publishing
摘要：Geopolymer is an emerging cementitious material characterized by better mechanical performance and more environmentally sustainable properties than ordinary Portland cement (OPC). Previous work mainly highlighted thermal behavior of metakaolin or fly ash-based geopolymers. This paper provides experimental data of geopolymer concrete manufactured with granulated blast furnace slag (GBFS) and fly ash after high temperature exposures of 400°C, 600°C, 800°C and 1 000°C in terms of ISO834. Residual compressive strength and splitting strength, as well as the effects of standing time were examined and compared with equivalent OPC concrete findings. The results revealed that both kinds of strength improved about 14% and 9% after being exposed to 400°C, and the reduction was less than OPC concrete. Additionally, the residual compressive strength after different exposures evolved variously with prolonging of standing time. On the basis of the results, the empirical equations of residual compressive strength and splitting strength of GC are established.