DISCRIMINATING METHOD FOR DEGREE OF CORROSION OF IRON REINFORCING FRAME IN CONCRETE STRUCTURE

PURPOSE:To determine whether a concrete structure is usable continuously by knowing the strength of the concrete structure by finding the density of Ca(OH)2 and that of CaCO3 in the concrete structure by an X-ray powder diffracting method, and thus discriminating the degree of corrosion of an iron reinforcing frame on the basis of the density ratio of the both. CONSTITUTION:A 100phimm. concrete core is sampled from a concrete structure and cut to about 10mm.thickness, and its position from the surface of the concrete structure is confirmed from a cutting margin and the thickness of the cut body. Then, this body to be tested is dried at 105 deg.C for 24 hours and ground finely into samples having