不同粗糙度的新旧混凝土界面黏结质量的超声试验研究

Ultrasonic experimental research on bond quality of new-to-old concrete interface with different roughness

针对新旧混凝土界面的工程处理方法,利用现场实际材料,对经过不同粗糙度处理的新旧混凝土黏结试样进行了超声波速和劈裂试验研究。结果表明,粗糙度不同的黏结试样的波速和劈裂抗拉强度是不同的,这为现场工人对黏结界面的粗糙处理工艺提出了要求,也为新旧混凝土界面的超声检测提供了依据。

Based on engineering processing method of new-to-old concrete interface and using actual material of job site, the test of ultrasonic wave velocity and splitting strength about new-to-old concrete interface dealed with different roughness is put forward.And experimental studies show that wave velocity and splitting strength are different with different new-to-old concrete interface.The demands are proposed for helping some builders to treat interface roughness, and necessary proof for ultrasonic detecting of new-to-old concrete interface is supplied.