高温作用后混凝土孔结构变化研究  

Study on Structural Change of Concrete Pore after High Temperature

作　　者：胡亮亮 蒋奇勇 HU Liangliang;JIANG Qiyong(Huadong Engineering Corporation Limited,Hangzhou Zhejiang 311122)

机构地区：[1]中国电建集团华东勘测设计研究院有限公司,浙江杭州311122

出　　处：《中国科技纵横》2023年第5期71-75,共5页China Science & Technology Overview

摘　　要：水泥基材料的研究,应该从宏观到微观,从整体到局部,注意不同层次之间的相互作用以及联系。本文结合压汞技术对不同温度处理后的混凝土微观结构进行探究,分析不同温度下的孔结构特征参数。基于分形理论,描述孔结构分形维数的变化,研究温度对混凝土孔结构变化的影响。将宏观性能与微观结构相结合,更好地探究混凝土在高温作用下的劣化机理。The research of cement-based materials should be from macro to micro,from whole to local,and pay attention to the interaction and connection between different levels.Combined with mercury pressure technology,the microstructure features of concrete after different temperature treatment and the characteristic parameters of pore structure at different temperatures were analyzed.Based on the fractal theory,the change of fractal dimension of pore structure is described,and the influence of temperature on the change of concrete pore structure is studied.The deterioration mechanism of concrete under high temperature is better explored by combining macroscopic performance with microscopic structure.

关 键 词：混凝土 高温作用 孔结构 分形维数 

分 类 号：TU501.3[建筑科学—建筑技术科学]