Influence of heterogeneity of the reinforcing bars in the cross section on the testimony of portable hardness

It is considered one of the most important trends in the field of inspection and quality control of existing structures.The basic methods for determining the class of reinforcement in concrete examination of buildings and structures. The possibility of using portable hardness in practice. Attention is paid to methods for treating the side surface of reinforcement stem. Experimental data showing the unevenness of reinforcement strength readings across the section depending on the depth of cut. Theconclusionsabouttheneedforadditionaltesting