COMPOSITION FOR COLORING OF CONCRETE CONTAINING OXIDIZED METAL AND COLORING METHOD OF CONCRETE USING THE SAME

摘要

PURPOSE: A composition for concrete coloring including metal oxide is provided to enable concrete coloring at a low cost by integrating with concrete only with a coating process on the surface of concrete. CONSTITUTION: A composition for concrete coloring including metal oxide comprises 20-40 weight% of HCl, 0.1-0.3 weight% of Al2O3, 0.15-0.3 weight% of CaO, 0.15-25 weight% of Cr2O3, and 35-75 weight% of metal oxide powder. The metal oxide is at least one selected among MnO, Fe2O3, and CuO. The composition for concrete coloring is mixed with water at a weight ratio of 1:01-3.0 and coated on a concrete surface. A concrete coloring method comprises the following steps: (a) a step of washing the concrete surface; (b) a step of forming a porous humus layer on the concrete surface by coating the composition for concrete coloring on the concrete surface and forming a coloring agent coated layer on the porous humus layer; and (c) a step of removing residue on the coloring agent coated layer.