CONCRETE PRODUCT CONTAINING POROUS CHARCOAL

PROBLEM TO BE SOLVED: To purify water, air, and environment and suppress the occurrence of efflorescence phenomenon greatly by blending and mixing wooden powdery and granular carbide and fine aggregate with portland cement at a specific ratio and pouring the mixture into a form having many fine projections on a surface thereof to harden it. SOLUTION: 15 to 35 pts.wt. of wooden carbide and 40 to 15 pts.wt. of fine aggregate are mixed with 100 pts.wt. of portland cement to mix wooden carbide in a large quantity. Next, the mixture is kneaded with predetermined water and is poured into a form having large and small recessed and projecting parts and fine projections on a surface thereof. Then, many thin holes 4a are formed on a surface of a concrete product 4, and many projecting parts 4b like pumice, small recessed parts 4c, and small projecting parts exist therein. Consequently, it is possible to improve purification capability and deodorization force greatly, reduce specific gravity greatly, and suppress the occurrence of primary and secondary self-abandoning.