PROBLEM TO BE SOLVED: To provide a weed-preventing material short in cure time, high in initial strength development, having initial freezing damage and crack resistance, capable of reducing labour of mowing, less in elution of heavy metals at low pH, environmental friendly and suitable for persistency of mowing, and an application method therefor.SOLUTION: There are provided (1) a weed-preventing material containing calcium aluminate with Blaine specific surface area value of 2500 cm2/g or more, and an aggregate with particle diameter of 0.1 to 50 mm consisting of one or more kind selected from burned ash, slag, coal ash and volcanic ash, (2) the weed-preventing material according to (1), further containing one or more kind of gypsum and soil, (3) the weed-preventing material according to (1) or (2) containing further calcium silicate, (4) an application method of the weed-preventing material for paving the weed-preventing material according to one of (1) to (3) on ground and sprinkling water on them and covering the ground and (5) an application method of the weed-preventing material by kneading the weed-preventing material according to any of (1) to (3) and water, paving them on ground and covering the ground.SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】硬化時間が短く、初期強度発現性が高く、初期凍害、ひび割れ抵抗性を有し、草刈の労力を軽減でき、低pHで重金属の溶出が少なく環境に優しく、防草の持続性に好適な防草材及びその使用方法を提供する。【解決手段】(1)ブレーン比表面積値2500cm2/g以上のカルシウムアルミネート、並びに、焼却灰、スラグ、石炭灰及び火山灰から選ばれた一種又は二種以上からなる粒子径が0.1~50mmの骨材を含有してなる防草材、(2)さらに、石膏と土壌のうち一種以上を含有してなる(1)の防草材、(3)さらに、カルシウムシリケートを含有してなる(1)又は(2)の防草材、(4)(1)~(3)のいずれかの防草材を地面に敷き詰めてその上に散水して被覆する防草材の使用方法、(5)(1)~(3)のいずれかの防草材を水と練り混ぜて地面に敷き詰めて被覆する防草材の使用方法、である。【選択図】なし
