碱激发剂对碱矿渣混凝土高温后抗压强度的影响研究  

Effect of alkali activator on compressive strength of alkali activated slag concrete after high temperature

作　　者：刘倩 马倩敏 彭潇 石瑜 龙应斌 梁治强 缪沁峰 LIU Qian;MA Qianmin;PENG Xiao;SHI Yu;LONG Yingbin;LIANG Zhiqiang;MIU Qinfeng(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;Faculty of Civil Engineering and Mechanics,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[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

出　　处：《新型建筑材料》2022年第2期70-74,共5页New Building Materials

基　　金：国家自然科学基金项目(52068038);云南省教育厅科学研究基金项目(2019J0044);云南省科技厅基础研究专项-面上项目(202101AT070089);昆明理工大学分析测试基金(2020M20192210078);云南省大学生创新训练项目(201910674247)。

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。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.

关 键 词：碱矿渣混凝土 高温 水玻璃模数 碱浓度 抗压强度 

分 类 号：TU528.2[建筑科学—建筑技术科学]