PURPOSE: To obtain a polymer cement composition having high chemical resistance, comprising fine powder of blast furnace granulated slag, an alkali stimulating agent and an ethylene-vinyl acetate copolymer emulsion as main components.

CONSTITUTION: A polymer cement composition comprising fine powder of blast furnace granulated slag, an alkali stimulating agent and an ethylene-vinyl acetate copolymer emulsion as main components. The fine powder of blast furnace granulated slag is made amorphous by quenching such as water cooling or air cooling of blast furnace slag produced as by-product from a blast furnace of an iron mill. The particle size of the blast furnace slag is ≥3,000cm2/g, preferably 5,000-8,000m2/g by Blaine permeability method. Use of sodium salt is most preferable as the alkali stimulating agent in terms of economic efficiency. An ethylenevinyl acetate copolymer emulsion having ≤10°C glass transition temperature of polymer is preferable with respect to bond strength and flexibility of coating film as the ethylene-vinyl acetate copolymer emulsion.