FIELD: construction.
SUBSTANCE: invention relates to construction. Essence: in the product there performed is zone of stress concentration, which is loaded before destruction and according to obtained data determining parameters of crack resistance of concrete. Zone of stress concentration in article is made on concrete surface in form of rectangular trapezoidal prismatic element with length of 5 diameters of maximum size of filler and height of one diameter of maximum size of filler, but not less than 20 mm, with trapezoid side inclination angle of 45 degrees, which smaller side is monolithically connected to concrete. Upper larger side is loaded along surface to fracture of prismatic element at least from concrete body. During loading simultaneously deformation of upper side and corresponding force is measured, and parameters of crack resistance of concrete are determined as per the received graph "deformation-force".
EFFECT: high accuracy and reliability of determining a critical coefficient of stress intensity in an article and wider field of use of the method.
1 cl, 5 dwg
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