| 摘要 |
PROBLEM TO BE SOLVED: To provide concrete products constructing suitable environments required for purification of water and ecological system, by forming pores having shapes and arbitrary size from the surface to the interior of the concrete products according to the use thereof, or charging substances capable of trapping hazardous metals, adsorbing fertilizer ingredients, or retaining water within the pores. SOLUTION: In forming the concrete products for ecological system growth, the pores are naturally formed by disappearing of substances soluble in water or decomposable and dispersible by bacteria, alkalies or others after installation or laying of the concrete products, by using pore forming substances or expanded substances thereof soluble in water or decomposable or dispersible by bacteria, alkalies or others, or by using composite pore forming substances containing ion exchange substances, water retentive substances, or fertilizers or other therein. |
