Sampling and tensile test on steel rebars

Steel bars sampling from reinforced concrete structures such as pillars, beams, slabs, walls or foundations allows to determine the steel mechanical properties of the steel (yield stress, tensile strength and strain at maximum load). Sampling is preceded by the localization of the reinforcement using a covermeter and the removal of the concrete cover using manual tools. The bar is then sampled (approximately 50 cm in lenght, regardless of diameter) by cutting with an angle grinder, and the structure is then restored (welding of B450C steel bar(s) of the same diameter as the piece taken, restoration of the concrete cover with high-quality cement mortar). The sample is localized, numbered and documented; the tensile test is finally executed at a state-authorized laboratory.

Reference standards: UNI EN ISO 6892-1:2020; UNI EN ISO 15630-1:2019