FIELD: building, particularly to determine structure concrete strength.
SUBSTANCE: method for determining concrete strength by concrete chipping during torsion thereof involves drilling bore-hole in concrete body; cutting annular groove in concrete body coaxial to bore-hole; arranging metal cylindrical ferrule in annular groove, wherein cylindrical ferrule has dimension comparable with that of sample; securing anchoring means in bore-hole and applying destructive force by rotating anchoring device up to sample damage. Concrete strength is determined from the following formula: R = Mcr·(16D·10-6)/(π(D4-d4)), where R is concrete strength, MPa, Mcr - moment of rupture, Nm, D - sample diameter, m, d - bore-hole diameter, m.
EFFECT: possibility to determine physical and mechanical concrete characteristics directly in structure body.
1 dwg
