FIELD: measuring equipment.
SUBSTANCE: radiator is placed stationary on the concrete surface and a receiver of ultrasonic signals is sequentially moved at a constant pitch along the line passing through the radiator installation point, wave propagation time reading is fixed for each receiver installation, wave travel time hodograph is plotted, hodograph line culminating point is determined at the boundary of the dry and liquid-impregnated concrete layer, the propagation pattern of transverse waves is used as an information parameter, after which the thickness of the liquid-impregnated concrete layer is calculated using the formula:
,
where h is the thickness of the liquid-impregnated concrete layer, mm, L is the distance from the radiator to the hodograph culminating point, mm, Ct1 and Ct2 are the velocities of transverse waves in liquid-impregnated and in dry concretes, respectively, m/s.
EFFECT: providing the possibility of determining the thickness of liquid-impregnated concrete layer in concrete and reinforced concrete constructions of structures with one-sided access to the controlled construction.
1 cl
