PURPOSE:To produce a hydraulic composite material for providing concrete or mortor having high strength and low heat generation and to obtain high- strength concrete. CONSTITUTION:40-65wt.% cement particles A having 0.5-100mum particle diameter is blended with 35-60wt.% reinforcing agent to be added consisting of particles B having 0.01-0.5mum particle diameter and particles C having 0.1-15mum particle diameters in the ratio of 20-50wt.% particles B and 50-80wt.% particles C to give a hydraulic composite material, which is kneaded with water at =25% water/powder ratio.
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