FIELD: testing equipment.
SUBSTANCE: method to determine concrete strength with non-destructive method according to a preset dependence, consists in the fact that liquid drops are applied onto the surface of the tested item. Further angles of sample contact are measured θ. Then the curve of functional dependence is built, cos θ-1 =f(1/σl), where σl - surface tension of liquid, the tangent of inclination angle is determined for this functional dependence α, and on the basis of the previously built dependence, the strength of concrete samples is calculated.
EFFECT: reduced time for determination of object strength, expansion of range of non-destructive check methods application.
2 cl, 2 dwg
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