PROBLEM TO BE SOLVED: To provide a weed-proof material which shows a short hardening time and has a high initial strength development property, and a method of using the same.SOLUTION: (1) A weed-proof material containing CaO-MgO-Al2O3 based substance having CaO of 25-35% by weight, Al2O3 of 55-68% by weight, MgO of 2-7% by weight, and V of 0.1-2% by weight, alkaline earth metal salt, and soil. (2) The weed-proof material according to (1) with a Blaine specific surface area of the CaO-MgO-Al2O3 based substance of 2000-6000 cm2/g. (3) A method of using a weed-proof material for covering by spreading the weed-proof material according to (1) or (2) on the ground and spraying water over it. (4) A method of using a weed-proof material for covering by kneading and mixing the weed-proof material according to (1) or (2) with water and by spreading or spraying it on 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い、防草材及びその使用方法を提供する。【解決手段】(1)CaOが25~35質量%、Al2O3が55~68質量%、MgOが2~7質量%、Vが0.1~2質量%であるCaO-MgO-Al2O3系物質とアルカリ土類金属塩及び土壌を含有してなる防草材、(2)CaO-MgO-Al2O3系物質のブレーン比表面積が、2000~6000cm2/gである(1)の防草材、(3)(1)又は(2)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、(4)(1)又は(2)の防草材を水で練混ぜて地面に敷詰または吹き付けて被覆する防草材の使用方法、である。【選択図】なし
