PROBLEM TO BE SOLVED: To provide a weed control material which has a short hardening time and high initial strength development, provides an initial freezing damage resistance and a crack resistance, can relieve the work of mowing, and can secure the persistence of weed control and the environmental conservation, and to provide a method of using the same.SOLUTION: There are provided: (1) a weed control material containing calcium aluminate, soil, and alkali metal salt (2) a weed control material of (1) further containing calcium sulfate (3) a weed control material of (1) or (2) in which calcium aluminate contains a mole ratio of 1.0-3 of CaO/Al2O3 and impurities of 15 wt.% or less (4) a weed control material of (1)-(3) further containing calcium silicate (5) a method of using a weed control material of (1)-(4) including laying the weed control material on the ground, sprinkling water thereon, and covering the ground and (6) a method of using a weed control material of (1)-(4) including mixing the weed control material with water, laying it on the 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、ひび割れ抵抗性を付与し、草刈の労力を軽減でき、防草の持続性と環境保全が確保できる防草材及びその使用方法を提供する。【解決手段】(1)カルシウムアルミネート、土壌及びアルカリ金属塩を含有してなる防草材、(2)さらに、石膏を含有してなる(1)の防草材、(3)カルシウムアルミネートが、CaO/Al2O3モル比1.0~3、不純物が15質量%以下である(1)又は(2)の防草材、(4)さらに、カルシウムシリケートを含有してなる(1)~(3)のいずれかの防草材、(5)(1)~(4)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、(6)(1)~(4)のいずれかの防草材を水で練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
