Investigation of the factors effecting the compressive strength of core samples

ABSTRACT Calculation of compressive strength of core samples, which is important in determining the concrete quality in-situ, depends on some factors. These factors are related with the operations beginning with taking the core samples from the construction, preparing them to the test and testing. In this research work, 4 reinforced concrete and 4 concrete structures were produced to simulate the structure in-situ, and 48 cores taken from these structures and kept in different mediums. The compressive strengths of these cores are compared with control samples, and the differences are researched. Effect of moisture content, rebars and damage given to the core samples while drilling are taken into consideration and the results are compared with similar researchs. Keywords: Core, size effect, moisture, effect of drilling, effect of rebar, concrete strength.