AGGREGATE COMPOSITION FOR SPRAYING CONCRETE AND SPRAYING CONCRETE

摘要

PROBLEM TO BE SOLVED: To provide an aggregate composition for spraying concrete obtained by crushing a concrete lump and used as recycled aggregate as it is without classifying the crushed matter, and to provide spraying concrete.

SOLUTION: The aggregate composition for spraying concrete contains: recycled aggregate composed of crushed matter with a particle diameter of≤15 mm obtained by crushing a concrete lump or an asphalt lump and not subjected to classification or a mixture of them; and fly ash. In the aggregate composition, when the volume of the fine aggregate with a particle diameter of≤5 mm in the recycled aggregate is defined as S, the volume of the coarse aggregate with a particle diameter of >5 mm in the recycled aggregate is defined as A, and the volume of the fly ash is defined as F, the conditions of (S+F)/(S+F+A)≥0.6 are satisfied. The spraying concrete contains: the aggregate composition for spraying concrete; a binder; and water.

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