CONCRETE COMPOSITIONS AND METHOD OF MANUFACTURING CONCRETE

摘要

In concrete containing cement, aggregate, fine mineral powder and water, a ratio (F/A) or fine mineral powder F to aggregate A of grain size distribution RFM (a ratio of fineness modulus of total aggregate to that of coarse aggregate) of not less than 0.80 is set to not less than 10 vol.%, or a ratio (F/S) of fine mineral powder F to fine aggregate S contained in the aggreate to not less than 30 vol.% and preferably to at least not less than 45 vol.%, whereby even aggregate of unsuitable grain size distribution is rendered usable as a concrete material and aggregate of suitable grain size distribution is improved in its strength.