Research on Concrete Ultrasonic Springback Comprehensive Measuring Curve of Kaifeng Area

According to the ultrasonic springback comprhensive measuring principle,the commonly-used concrete of Kaifeng area was used to make concrete samples with different strength and ages.Based on the concrete samples,many comprehensive measurment and anti-pressure and damage tests were made,and the least square method was selected to fit the measuring parameters and real anti-pressure strength.The ultrasonic springback comprehensive special curve of Kaifeng area was established and verifitied.