高温作用对粉煤灰-矿渣基多孔地聚合物性能的影响  

Effect of High Temperature on Properties of Fly Ash-Slag Based Porous Geopolymer

作　　者：杨旭清 王辉[1,2] 高尚 郭美丽 孟泽浩 武越宇 YANG Xuqing;WANG Hui;GAO Shang;GUO Meili;MENG Zehao;WU Yueyu(Key Laboratory of Road and Railway Engineering Safety of Ministry of Education,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Hebei Province Metal Mine Safe and Efficient Mining Technology Innovation Center,Shijiazhuang 050043,China;No.6 Geological Team of Shandong Province Bureau of Geology and Mineral Resources,Weihai 264209,China)

机构地区：[1]石家庄铁道大学道路与铁道工程安全保障省部共建教育部重点实验室,石家庄050043 [2]石家庄铁道大学土木工程学院,石家庄050043 [3]河北省金属矿山安全高效开采技术创新中心,石家庄050043 [4]山东省地质矿产勘查开发局第六地质大队,威海264209

出　　处：《硅酸盐通报》2025年第2期561-568,共8页Bulletin of the Chinese Ceramic Society

基　　金：河北省自然科学青年基金(D2019210272);石家庄铁道大学2022年度土木工程学院自主课题(TMXN2202);河北省自然科学基金(D2023210005)。

摘　　要：了解多孔地聚合物在高温条件下的性能变化,有助于优化多孔地聚合物在高温环境中的应用。本研究分别在200~800℃条件下对粉煤灰-矿渣基多孔地聚合物材料进行高温处理,研究高温作用对多孔地聚合物物质组成、微观结构和宏观性能的影响。结果表明,粉煤灰-矿渣基多孔地聚合物最显著的质量损失发生在600℃以下,主要归因于自由水、结合水的蒸发和脱羟基化,600℃以上质量损失减弱,主要对应于部分碳酸盐物质的分解。多孔地聚合物的微观结构在200℃以下基本保持稳定,400℃以上开始出现热裂纹和熔化现象。随加热温度升高,多孔地聚合物的孔隙率、孔隙连通性和平均孔径不断增大,抗压强度不断减小,导热系数先降低后升高。Understanding the performance changes of porous geopolymers under high temperature conditions is helpful to optimize application porous geopolymer in high temperature environments.In this study,fly ash-slag based porous geopolymer materials were subjected to high temperature treatment at 200~800℃,and the effects of high temperature on the composition,microstructure and macroscopic properties of porous geopolymers were studied.The results show that the most significant mass loss of fly ash-slag based porous geopolymer occurs below 600℃,which is mainly attributed to the evaporation and dehydroxylation of free water and bound water.Above 600℃,the mass loss is weakened,mainly corresponding to the decomposition of some carbonate substances.The microstructure of porous geopolymer remains basically stable below 200℃,and hot cracking and melting begin to occur above 400℃.With the increase of heating temperature,the porosity,pore connectivity and average pore size of porous geopolymer increase continuously,the compressive strength decreases continuously,and the thermal conductivity decreases first and then increases.

关 键 词：多孔地聚合物 孔结构 抗压强度 高温处理 热重分析 微观形貌 

分 类 号：TU55[建筑科学—建筑技术科学]