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碱激发剂对碱矿渣混凝土高温后抗压强度的影响研究
作者：刘倩1，马倩敏1，彭潇2，石瑜2，龙应斌2，梁治强2，缪沁峰2
（1.昆明理工大学 建筑工程学院，云南省土木工程防灾重点实验室，云南 昆明 650500；
2.昆明理工大学 建筑工程学院，云南 昆明 650500）
摘要：研究了激发剂碱浓度和模数对碱矿渣混凝土经高温作用后抗压强度的影响。结果表明，对于水胶比为0.45的碱矿渣混凝土，当水玻璃模数低于1.5时，随着碱浓度的增加，碱矿渣混凝土高温后的残余抗压强度先提高后降低，碱浓度为6%时最高；而当模数为2.0时，碱浓度为8%的残余抗压强度最高。当碱浓度低于6%时，水玻璃模数与碱矿渣混凝土高温后的残余抗压强度成反比；而当碱浓度为8%时，模数为2.0的碱矿渣混凝土残余抗压强度最高。
关键词：碱矿渣混凝土；高温；水玻璃模数；碱浓度；抗压强度
中图分类号：TU528.2 文献标识码：A 文章编号：1001-702X（2022）02-0070-05
Effect of alkali activator on compressive strength of alkali activated slag concrete after high temperature
LIU Qian1，MA Qianmin1，PENG Xiao2，SHI Yu2，LONG Yingbin2，LIANG Zhiqiang2，MIU Qinfeng2
（1.Key Laboratory of Yunnan Province for Disaster Prevention in Civil Engineering，
Faculty of Civil Engineering and Mechanics，Kunming University of Science and Technology，Kunming 650500，China；
2.Faculty of Civil Engineering and Mechanics，Kunming University of Science and Technology，Kunming 650500，China）
Abstract：The effects of alkali concentration and modulus of activator on the compressive strength of alkali slag concrete after high temperature were studied. The results show that the residual compressive strength of alkali slag concrete with water-binder ratio of 0.45 increases first and then decreases with the increase of alkali concentration when the sodium glass modulus is less than 1.5，and the maximum compressive strength is reached when the alkali concentration is 6%. When the modulus is 2.0，the residual compressive strength of 8% alkali concentration is the largest. When the alkali concentration is lower than 6%，the modulus of sodium silicate is inversely proportional to the residual compressive strength of alkali slag concrete after high temperature. However，when the alkali concentration is 8%，the residual compressive strength of alkali slag concrete with modulus 2.0 is the largest.
Key words：alkali slag concrete，high temperature，sodium silicate modulus，alkali concentration，compressive strength