超声回弹法检测再生骨料混凝土强度的试验分析

该文探究超声回弹法在再生骨料混凝土强度检测中的应用。采用对照试验法,使用再生骨料和水泥、外加剂等配制再生骨料混凝土,并制作标准试件,经过28 d养护后使用不同方法测定其抗压强度。以压力试验机测定的再生骨料混凝土试块抗压强度作为标准值,将回弹法和超声回弹法测定的抗压强度作为对照值,观察测定误差进而判断2种方法的优劣。分析试验数据可知,使用回弹法测定试块的抗压强度,测量值与标准值的误差为1.45%;使用超声回弹法测定试块的抗压强度,测量值与标准值的误差为0.49%。由此可得,超声回弹法在测定再生骨料混凝土抗压强度方面精度更高,能够为再生骨料混凝土的制备与应用提供参考。

This paper explores the application of ultrasonic rebound method in the strength testing of recycled aggregate concrete.Using the control test method,recycled aggregate concrete was prepared with recycled aggregate,cement and admixture,and standard specimens were made.After 28 days of curing,different methods were used to determine its compressive strength.The compressive strength of recycled aggregate concrete test blocks measured by the pressure testing machine is taken as the standard value,and the compressive strength measured by rebound method and ultrasonic rebound method is taken as the control value to observe the measurement error and judge the advantages and disadvantages of the two methods.The analysis of the test data shows that the compressive strength of the test block is measured by the rebound method,and the error between the measured value and the standard value is 1.45%;the error between the measured value and the standard value is 0.49% when the ultrasonic rebound method is used to determine the compressive strength of the test block.As a result,the ultrasonic rebound method is more accurate in measuring the compressive strength of recycled aggregate concrete,and can provide reference for the preparation and application of recycled aggregate concrete.