Experiments of different rebound detection standards on C50T beam of Yunnan highway

In view of rebound detection of C50T beam on highway, through the selection and analysis of JGJ/T23 and related standards, different resilience instruments and different standards were used to verify and test the concrete field engineering of a highway T-beam in Yunnan province, and the following conclusions were drawn: The selection of different resilience testing standards had a great impact on the test results of C50T beam concrete (the presumed strength difference is more than 15 MPa); The rebound instrument was within the specified test range, and the difference was more from the choice of curves; It was suggested that JGJ/T23, JGJ/T294 and local standards should be tested and compared on site, and special curves should be established if necessary, so as to improve the accuracy of in-situ concrete strength detection by rebound method.