ESTIMATION OF IN-PLACE STRENGTH OF CONCRETE WITH COMBINED NONDESTRUCTIVE METHOD

Abstract

This paper presents estimation of concrete strength by the SONREB method that is a combined non-destructive testing method and application of the method on a reinforced concrete building structure. Comparison of results of both destructive and non-destructive test results is introduced also. The SONREB method is based on evaluation of the combination of Schmidt hammer readings and ultrasonic pulse velocity measurements. The measured material properties are correlated with compressive strength of concrete by using special iso-strength curves established in the laboratory. The strength is also checked with strength of cores drilled from suitable positions on the building. In-place strength of concrete giving without any structural damage to the structure could be estimated rapidly and approximately with the SONREB method. It was concluded that the special isostrength curves increase sensitivity of in-place compressive strength estimation of concrete.

Keywords

• Beton, Bileşik yıkıntısız yöntem, Eş-dayanım