ABSTRACT
Non-destructive testing (NDT) and partially destructive testing (PDT) are key methods for assessing the in-situ concrete strength of reinforced concrete (RC) buildings. Due to factors like seismic re-qualification and design life re-evaluation, condition assessment is becoming demanding now a days. International codes provide guidelines to determine concrete strength using NDT and PDT results. However, in cases of deteriorated health or restricted access, PDT may not be feasible, necessitating reliance solely on NDT. Currently, there is no well-established reliable method for obtaining concrete strength only with NDT is a building. This study proposes parametric (regression with non-constant variance) and non-parametric technique that combines NDT results from a building with NDT-PDT data from similar adjacent buildings to estimate concrete strength. A case study followed by validation of methodology from field data illustrates the approach, offering valuable insights for global practitioners dealing with in-situ concrete strength evaluation.
