METHOD FOR DETERMINING THICKNESS OF CONCRETE LAYER WITH DEFECTIVE STRUCTURE Russian patent published in 1997 - IPC

FIELD: full-scale tests of concrete structures suffering temperature gradient during fire. SUBSTANCE: defective and reference regions of structure are determined. Dowel pins of various hardness are driven in each of these regions by means of mounting gun using powder hitch cartridges. Difference in depths through which dowel pins are driven into defective and reference regions is measured. Thickness of concrete layer with defective structure is calculated by means of formula at positive and negative ambient temperatures. Cartridges used have equal energy of powder charge. EFFECT: improved validity of test results. 3 cl, 2 dwg