混凝土抗压强度与其早期热膨胀系数相关性试验研究  

Experimental study on correlation between compressive strength and thermal expansion coefficient of concrete at early ages

作　　者：黄杰[1,2] 帅映勇[1] 赵林[2] 

机构地区：[1]泰州职业技术学院建筑工程学院,江苏泰州225300 [2]江苏省江建集团有限公司,江苏扬州225200

出　　处：《中国建材科技》2017年第6期45-46,84,共3页China Building Materials Science & Technology

基　　金：江苏省高等学校自然科学研究项目资助(17KJB560010):水泥基材料时变热膨胀系数预测模型及细观机理研究;2015年度扬州市"绿扬金凤计划"资助项目:高性能混凝土养护技术研究;江苏省高职院校青年教师企业实践培训资助项目(2016QYSJ052);2017年江苏省大学生实践创新计划项目(201712106016X):不同养护制度下高性能混凝土耐久性试验研究

摘　　要：混凝土早期热膨胀系数和抗压强度是早期开裂计算和结构计算重要的热、力学参数,但两者有相关性。文中试验研究了21组不同配合比混凝土的早期热变形和抗压强度,以粗骨料种类、粉煤灰掺量和外加剂为影响因素。研究表明:粗骨料热膨胀系数在5.5x10^6/℃左右时,抗压强度有最大值;单位抗压强度的热膨胀系数与粉煤灰掺量呈线性关系;掺外加剂时,抗压强度和热膨胀系数成反比关系。研究结果对建立相关工程概念有现实意义。The thermal expansion coefficient（TEC） and compressive strength of concrete are important thermal and mechanical parameters in early cracking and structural calculation.The two are associated.In this paper, the early thermal deformation and compressive strength of 21 different mixes of concrete were experimental studied. The factors influencing such as coarse aggregate type, fly ash content and admixture were studied. The results show that the compressive strength is maximum when the TEC of coarse aggregate is 5.5 x10^6/℃, and the TEC of unit compressive strength is linear with the content of fly ash, and compressive strength is inversely proportional with the TEC when adding an admixture. The results of the study have practical significance in establishing the related engineering concept.

关 键 词：混凝土 热膨胀系数 抗压强度 早龄期 

分 类 号：TU525[建筑科学—建筑技术科学]