Non-desrtuctive test on distressed reinforced concrete structures

The concrete characterization and properties of reinforced concrete members subjected to reinforcement corrosion was studied using several non-destructive tests and in-situ tests. A few structures suffered corrosion problem were selected for the study. This project presents some findings on the use of parameters to detect corrosion damage in reinforced concrete members. The changes of concrete properties of deteriorated reinforced concrete members caused by corrosion of reinforcement were depicted base on some cases study in Malaysia. The nominated structures consists of a bridge in Seberang Perai, a low cost apartment and a college in Melaka, two shop- lots in Tanjung Sepat and silo structures in Wilayah Labuan, Sabah. A set of diagnostic tool and parameter was established for purpose of ascertaining the presence of damage, cause, geometric location, severity and structural capacity through nominal non-destructive test and laboratory test. Correlation between the tests and the changes of its modal parameter was analyzed and revealed by the nominal tests conducted. This investigation provided further insight on the use of NDT and to minimize the frequency of destructive testing in appraisal and diagnosis to the corroded reinforced concrete members.

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