engleski

Comparison of methods for in situ concrete compressive strength assessment

Paper presents a case study made during construction of two high-rise buildings in Zagreb, the capital of Croatia. Concrete compressive strength assessment was determined by two different non-destructive test (NDT) methods (pull-out testing and schmidt hammer). Parallel with NDT concrete strength tests cube testing was also done. An analysis of the results obtained show a correlation between pull-out and schmidt hammer strength and concrete cubes strength at various ages. According to the results obtained, a comparison of different NDT methods for early age strength assessment was made. It is recommended that a pull-out testing method can be successful used for early age determination of concrete compressive strength in structure.

concrete strength, non-destructive test methods, pull-out testing, schmidt hammer

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