高强混凝土超声回弹法地区测强曲线试验研究  

Study on high-strength concrete ultrasonic rebound method for regional strength curve test

作　　者：沈金生 焦轼伦[2] 李扬 吴成杰 刘利伟 贾少卓 SHEN Jinsheng;JIAO Shilun;LI Yang;WU Chengjie;LIU Liwei;JIA Shaozhuo(Tianjin University,Tianjin 300073,China;Hebei University of Engineering,Handan 056038,China;Handan Jianye Construction Engineering Test Co.,Ltd.,Handan 056000,China)

机构地区：[1]天津大学,天津300073 [2]河北工程大学,河北邯郸056038 [3]邯郸市建业建设工程质量检测有限公司,河北邯郸056000

出　　处：《混凝土》2020年第4期145-147,共3页Concrete

基　　金：国家自然科学基金(51378169);河北省建设厅资助项目(2017-2002)。

摘　　要：针对邯郸地区原材料等特点,制作了C50、C55、C60、C65、C70、C75、C80共7个强度等级的边长为150 mm的标准立方体试件,龄期分别为7、14、28、60、90、180、365 d,通过超声回弹-抗压试验,采集超声波速、回弹值及抗压强度值等数据、采用MATLAB进行数据整理分析,基于最小二乘法原理对数学函数模型进行拟合分析,经分析得出更适用于邯郸地区的超声回弹综合法测强曲线。For the characteristics of raw materials in Handan area,C50,C55,C60,C65,C70,C75,C80,7 standard strength test pieces with a length of 150 mm were produced,their ages are 7,14,28,60,90,180 and 365 d.Through ultrasonic rebound-compression test,data such as ultrasonic speed,rebound value,and compressive strength value are collected,and data analysis is performed by MATLAB.The mathematical function model is fitted and analyzed based on the principle of least squares.The strength curve of ultrasonic rebound method which is more suitable for Handan area is obtained through analysis.

关 键 词：高强混凝土 超声回弹综合法 测强曲线 

分 类 号：TU528.07[建筑科学—建筑技术科学]