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The applicability of rebound number measurement in high strength concrete with 40 to 200MPa was examined. Conclusions are as follows. (1) When compressive strength of concrete is about 50MPa to 160MPa, rebound hummer can obtain the stable measurement result. (2) The expression of relations of rebound number measurement results and core strengths of concrete columns in the concrete with 40 to 200MPa was proposed. (3) Rebound hummer cannot respond to change of concrete strength caused by the difference in aggregate. (4) The correction method of the expression of relations of rebound number measurement results and core strengths of concrete columns using cylinder specimen was proposed.

STUDY ON APPLICABILITY OF REBOUND NUMBER MEASUREMENT FOR ESTIMATION OF COMPRESSIVE STRENGTH OF HIGH STRENGTH CONCRETE