PURPOSE: Provided is a tree-planting base composition for filing porous concrete block which can inhibit a pH-increasing by free lime eluted from cement and supply a nitrogen source to plant, and which helps the early introduction and fixing of vegetation. CONSTITUTION: The tree-planting base composition for filing porous concrete block comprises 20-70 volume% of soil, 1-10 volume% of propylene amide-propenoate copolymer, and 20-79 volume% of ammonium sulfate-adsorbed vermiculite or ammonium sulfate-adsorbed pearlite. The ammonium sulfate-adsorbed vermiculite or ammonium sulfate-adsorbed pearlite is one that 0.1-1.0 wt.% of ammonium sulfate is adsorbed to vermiculite or pearlite, respectively. The block has a porosity of 20-40%, the size of 30-40 cm in width and 30-40 cm in length, and a thickness of 12-15 cm.

Kim Yong Gyu

Papers

Tree-planting base composition for filling porous concrete block