| 摘要 |
PROBLEM TO BE SOLVED: To provide a dry cement concrete and a spray material capable of reducing emission of powder dust and quantity of a consumed accelerator, free from adverse effect such as increase in rebounding rate and reduction of initial strength manifestation while reducing the quantity of the consumed accelerator. SOLUTION: This cement concrete including calcium aluminates comprises previously included calcium aluminates, water and if necessary gypsum. The dry cement concrete may include an accelerating admixture. The accelerating admixture is one or two or more kinds preferably selected from a carbonate, sulfate, aluminate and hydroxide. The spraying material includes the dry cement concrete and the accelerating admixture. |
