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15.2.5.3 - Material Properties: From columns or curtains TS EN 12504-1In accordance with the conditions specified in., one concrete sample will be taken from each 400 m2, not less than three on the ground floor and not less than two on the other floors, and not less than nine in the building. The strength values obtained by testing the cores whose length and nominal diameter are equal to each other and 100 mm can be used to determine the current strength of concrete without applying any coefficient. In converting the test results obtained from cores with different length / diameter ratios, appropriate conversion coefficients should be taken as basis. In the calculation of the capacities of the elements, the greater of the (mean minus standard deviation) value obtained from the samples and (0.85 times the average) value will be taken as the current concrete strength. It will be checked whether the smallest value is a statistically deviating result by evaluating the difference between the smallest value and the average of the remaining results among the test results of a group of concrete samples. For this purpose, when evaluating the sample results in the group, if the lowest single value is lower than 75% of the average of the remaining results, this sample is not considered. The distribution of concrete strength in the building can be checked with concrete hammer readings or similar undamaged inspection tools adapted with concrete samples test results. Reinforcement class, This sample is not considered if it is lower than 75% of the mean of the remaining results. The distribution of concrete strength in the building can be checked with concrete hammer readings or similar undamaged inspection tools adapted with concrete samples test results. Reinforcement class, This sample is not considered if it is lower than 75% of the mean of the remaining results. The distribution of concrete strength in the building can be checked with concrete hammer readings or similar undamaged inspection tools adapted with concrete samples test results. Reinforcement class,As described in 15.2.5.2 , the stripped surfaces will be determined by the examination, one sample will be taken for each grade of steel (S220, S420, etc.), and the yield stress, rupture strength and deformation properties of the steel will be determined and the suitability for the project will be determined. If appropriate for the project, the characteristic yield stress of the steel used in the project will be taken as the current yield stress in the element capacity calculations. If it is not suitable, at least three more samples will be tested and the most unfavorable yield stress obtained will be taken as the current steel yield stress in the element capacity calculations. In this examination, the elements with corrosion in the reinforcement will be marked in the plan and this will be taken into account in the element capacity calculations.
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