通用硅酸盐水泥基材料低频介电性能的研究进展  

Low-Frequency Dielectric Behavior of Common Portland Cement-Based Materials:A Review

作　　者：席翔 储洪强[1] 冉千平[2,3] 张文一 蒋林华 CHUNG DDL[5] XI Xiang;CHU Hongqiang;RAN Qianping;ZHANG Wenyi;JIANG Linhua;CHUNG DDL(College of Mechanics and Materials,Hohai University,Nanjing 211106,China;State Key Laboratory of High Performance Civil Engineering Materials,Jiangsu Research Institute of Building Science Co.,Ltd.,Nanjing 210008,China;School of Materials Science and Engineering,Southeast University,Nanjing 211189,China;School of Mechatronical Engineering,Beijing Institute of Technology,Beijing 100081,China;Department of Mechanical and Aerospace Engineering,University at Buffalo,the State University of New York,Buffalo 14260-4400,U.S.A.)

机构地区：[1]河海大学力学与材料学院,南京211100 [2]江苏省建筑科学研究院有限公司,高性能土木工程材料国家重点实验室,南京210008 [3]东南大学材料科学与工程学院,南京211189 [4]北京理工大学机电学院,北京100081 [5]纽约州立大学布法罗分校机械与航空航天工程学院,布法罗14260-4400,美国

出　　处：《硅酸盐学报》2023年第8期2074-2089,共16页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(52079048);江苏省重点研发计划项目(BE2020780)。

摘　　要：介电性能描述了水泥基材料中的极化现象,即正负电荷中心发生分离的现象。目前,国内外学者针对通用硅酸盐水泥基材料的低频介电性能开展了大量研究,涉及水泥基材料的微结构、水泥水化过程、受力状态等,但缺少对最新成果的归纳整理和综合评述。本文通过综述近20年来国内外学者对通用硅酸盐水泥基材料低频介电性能的最新研究成果,对介电常数的测量方法进行介绍,分析了通用硅酸盐水泥基材料中的极化机理,讨论了骨料、水灰比、应力/应变和温度等因素对通用硅酸盐水泥基材料介电性能的影响规律。结果表明:孔隙溶液中的离子是影响通用硅酸盐水泥基材料介电性能的主要原因,通过离子的移动形成的电偶极子以串联的方式连接。骨料和外掺物通过影响微结构影响介电性能。温度升高和压应力会增强介电性能,温度降低和拉应力会减弱介电性能。最后针对今后需要深入开展的相关研究提出建议。Dielectric behavior pertains to the polarization of cement-based materials,in which the positive and negative charge centers are separated.Recent work on the dielectric behavior of common Portland cement-based materials in a low frequency regime were carried out,including the dependence of dielectric behavior on microstructures,hydration process,loadings,etc.This review represented the results of dielectric behavior of common Portland cement-based materials over the past decade and introduced the dielectric measurement method and the dependence of polarization on aggregates,water cement ratio,stress/strain,and temperature.It is indicated that some movable ions in pore solution dominate the dielectric behavior,in which the electric dipoles are in series.Aggregates and admixtures affect dielectric behavior due to relevant changes in microstructures.Heating and compression strengthen the dielectric behavior,while cooling and tension weaken the dielectric behavior.In addition,some related future research aspects were also prospected.

关 键 词：水泥基材料 介电性能 介电常数 极化 电导率 

分 类 号：TU528[建筑科学—建筑技术科学]