PROBLEM TO BE SOLVED: To provide a weed control material in which a cure period is short and initial strength development is high, the resistivity to initial frost damage and cracking is superior, an effort of mowing can be reduced, a weed control effect is maintained, and it is eco-friendly, and provide its usage.SOLUTION: (1) A weed control material is formed by containing a calcium aluminate, rubber chips and soil. (2) Further, the weed control material of (1) is formed by containing a calcium sulfate. (3) Further, the weed control material of (1) or (2) is formed by containing a calcium silicate. (4) Any weed control material of (1) to (3) is formed by containing a calcium aluminate of CaO/Al2O3 having a molar ratio of 1-3 and impurities of 15 mass% or less. (5) Any weed control material of (1) to (4) is formed by containing a polymer for cement admixture. (6) A usage of the weed control material is provided by spreading any weed control material of (1) to (5) on the ground and being watered and covered thereon.SELECTED DRAWING: NoneCOPYRIGHT: (C)2019,JPO&INPIT【課題】硬化時間が短くて初期強度発現性が高く、初期凍害やひび割れ抵抗性に優れ、草刈の労力を軽減でき、防草効果が持続して環境に優しい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、ゴムチップ及び土壌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)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)カルシウムアルミネートが、CaO/Al2O3モル比1~3、不純物15質量%以下である(1)~(3)のいずれかの防草材、(5)セメント混和用ポリマーを含有してなる(1)~(4)のいずれかの防草材、(6)(1)~(5)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である。【選択図】なし
