PROCESS DETERMINING STRENGTH OF CONCRETE BY NONDESTRUCTIVE METHOD OF TEST AND GEAR FOR ITS REALIZATION Russian patent published in 2000 - IPC

FIELD: construction industry. SUBSTANCE: invention can be used for intermediate test of articles based on concrete and for examination of erected buildings. In correspondence with invention diameters of imprints on concrete and on standard steel bar are measured in sequence with the use of rules of angular scale. Scale of rules has form of graduation dependence of strength of concrete on relation of imprints on concrete and standard steel bar R= f(H). Imprints are produced with the aid of special hammer. Strength of concrete is evaluated by position of diameter of imprint on bar. Rules with mentioned measurement scale are connected for change of their relative angular position and its fixing. Invention allows operations of measurement of characteristics of concrete and steel bar and computations to be avoided. EFFECT: decreased labor input for determination of strength of concrete, improved timeliness and accuracy of test. 4 cl, 1 dwg