超声回弹综合法检测大掺量复掺矿物掺合料混合砂混凝土实体抗压强度试验研究

Experimental study on inspecting structure compressive strength of concrete with high volumn composite mineral admixtures and mixed sand by ultrasonic-rebound combined method

在大掺量复掺矿物掺合料混合砂混凝土泵送浇筑的大型实体模型上进行超声、回弹测试,在原位钻取芯样替代实验室的立方体试块,采用最小二乘法回归拟合得到超声回弹综合法测强曲线。通过工程测试数据误差分析与验证结果表明,建立的综合法测强曲线较国家及北京曲线具有更高的检测精度,适合于该类混凝土抗压强度的现场检测。

Based on the data which obtained from the models of large scale simulation structure which pumped with the high volume composite mineral admixtures and mixed sand concrete,substituted the core sample from the solid models for cubic sample in the laboratory,the ultrasonic-rebound combined strength curve is established by least square method.Through the error analysis and the comparison between the national and Beijing area curve with the site test data of actual engineering,the superiority of the article curve is testified,and is suitable for the high volumn composite mineral admixtures and mixed sand concrete.