摘要
为研究水灰比对不同温度作用下混凝土残余抗压强度、质量损失的影响,对不同受火温度和不同水灰比的混凝土标准立方体试件进行高温下及高温后的抗压强度试验和质量损失测试。试验结果表明:随着水灰比的增大,高温下及高温后混凝土抗压强度、混凝土质量损失均呈现出整体下降的趋势。通过试验拟合回归分析,建立了高温下混凝土抗压强度、质量损失与受火温度之间的关系式,可通过质量损失、受火温度来预估高温下混凝土残余抗压强度。
In order to investigate the influence of water-cement ratio on compressive strength and mass loss of concrete under different elevated temperature levels,a total of 100 standard concrete cube specimens with different water-cement ratios were tested at and after elevated temperatures. The experimental results show that the compressive strength and mass loss of concrete tend to decrease with the increase of water-cement ratio after the specimen exposed to high temperatures. By regression analysis on test data,the relationship between compressive strength as well as mass loss of concrete and exposure temperatures was proposed,which can be used to assess the residual compressive of concrete suffering mass loss or high temperature.
作者
张白
陈俊
杨鸥
杨才千
龙士国
许福
ZHANG Bai;CHEN Jun;YANG Ou;YANG Caiqian;LONG Shiguo;XU Fu(College of Civil Engineering and Mechanics,Xiangtan University,Xiangtan 411105,China;School of Civil Engineering,Southeast University,Nanjing 211189,China;College of Civil Engineering,Hunan University,Changsha 410082,China)
出处
《防灾减灾工程学报》
CSCD
北大核心
2018年第6期1012-1019,1060,共9页
Journal of Disaster Prevention and Mitigation Engineering
基金
国家自然科学基金面上项目(51578229)资助
关键词
水灰比
高温
混凝土
残余抗压强度
质量损失
water-cement ratio
high temperature
concrete
residual compressive strength
mass loss
