高温对黏土砖砌体抗压强度影响研究进展  

Influence of high temperature on compressive strength of claybrick masonry: A literature review

作　　者：郑文忠[1] 黄文宣 王英[1] 焦贞贞 ZHENG Wenzhong;HUANG Wenxuan;WANG Ying;JIAO Zhenzhen(Key Laboratory of Structures Dynamic Behavior and Control(Harbin Institute of Technology),Ministry of Education,Harbin 150090,China)

机构地区：[1]结构工程灾变与控制教育部重点实验室(哈尔滨工业大学),哈尔滨150090

出　　处：《哈尔滨工业大学学报》2020年第11期192-200,共9页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金(51478142)。

摘　　要：为给出黏土砖、砂浆和砖砌体高温力学性能的量化表达,论述了黏土砖、水泥砂浆、砖砌体等高温力学性能的研究进展,总结了现有研究存在的问题.分析表明,高温下黏土砖抗压强度随温度的升高而线性减小,历经温度为1000℃时,高温下黏土砖抗压强度折减系数为0.53.历经温度不高于600℃时,高温后黏土砖抗压强度随历经温度的升高而线性降低,600℃时黏土砖抗压强度约为常温下的56.2%.高温后水泥砂浆抗压强度随历经温度升高而降低,历经温度介于300~800℃且水灰比不大于0.45时,高温后水泥砂浆抗压强度折减系数随水灰比增大而增大;若水灰比大于0.45,高温后水泥砂浆抗压强度折减系数随水灰比增大而减小.黏土砖砌体抗压强度随历经温度升高而降低.建立了高温后黏土砖、砂浆及黏土砖砌体抗压强度计算公式.On the basis of the results obtained by relevant literature at home and abroad,the quantified expressions for clay brick,mortar,and brick masonry were established,and some existing problems were summarized.Analysis shows that at high temperature,the compressive strength of clay brick decreased linearly with the increase of temperature,and the reduction coefficient of the compressive strength of clay brick was 0.53 at 1000℃.When the temperature was lower than 600℃,the compressive strength of clay brick after high temperature decreased linearly with increasing temperature,and the compressive strength at 600℃was about 56.2%of that at room temperature.The compressive strength of cement mortar after high temperature decreased with rising temperature.With temperature between 300 and 800℃,the reduction coefficient of the compressive strength of cement mortar after high temperature increased with the increase of water cement ratio when it was lower than 0.45,and it decreased when the water cement ratio was over 0.45.The compressive strength of clay brick masonry decreased with increasing temperature.Finally,formulas for calculating the compressive strength of clay brick,mortar,and clay brick masonry after high temperature were established.

关 键 词：黏土砖 水泥砂浆 砖砌体 抗压强度 水灰比 

分 类 号：TU362[建筑科学—结构工程]