Long-Term Concrete Structural Strength Field Comparison Test Study
[Purposes]Concrete structures in service for a long period of time suffer serious deterioration due to loads and environmental factors.Without destroying the structure and affecting its use,timely and accurate determination of concrete strength is crucial for evaluating the safety of bridges.[Methods]In this study,four testing methods,namely,rebound method,ultrasonic rebound synthesis method,post-anchorage method,and core drilling method,were used to test the concrete strength of nine long-service concrete members in the field and make comparative analysis.[Findings]The average errors of the re-bound method(national strength curve),rebound method(local strength curve),ultrasonic rebound syn-thesized method(national strength curve),ultrasonic rebound synthesized method(local strength curve),post-anchorage method and core drilling method were-6.69%,+29.65%,+10.65%,+46.81%and+7.53%respectively.[Conclusions]It was found that the strength conversion values of the local curves derived by using the rebound method and the ultrasonic rebound synthesis method were higher than those of the national curves.
NETL
NSTL
万方数据
