VERIFICATION OF THE PERFORMANCE OF TEST METHODS IN LABORATORY CONDITIONS TO DETERMINE THE RELATIVE UNIFORM ELASTICITY OF METAL REINFORCEMENT BUILDING MATERIALS

This work covers the issues of verification of the implementation of test methods for determining the value of the relative uniform elongation (relative deformation) of metal reinforcement construction materials in laboratory conditions. The main purpose of the study is to assess the mechanical properties of reinforcing steel, in particular, the accuracy and reliability of deformation indicators during elongation, and to verify the repeatability and reproducibility of current standard test methods. In the work process, the stages of sample preparation, marking, dimensioning, and tensile testing are carried out in laboratory conditions in accordance with current regulatory documents, including the requirements of Uzbek DSt 1497 and GOST 12004. Tests are performed on universal testing machines, and load and relative elongation indicators are recorded using special measuring instruments. Obtained results statistic analysis average value, variance and deviation indicators is determined.