| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic composition which, before hardening, excels in flowability and material separation resistance and has self-filling ability and, after hardening, has a compressive strength of 130 MPa or larger a flexural strength of 20 MPa or larger and large fracture energy. SOLUTION: The hydraulic composition includes a cement 100 pts.wt., a pozzolanic fine powder 5 to 50 pts.wt., a fine aggregate (grain size of 2 mm or less) 50 to 250 pts.wt., a dispersant 0.5 to 4.0 pts.wt. (in terms of solid contents), an organic fiber and/or an inorganic fiber 0.1 to 10% by volume ratio in the hydraulic composition, water 10 to 35 pts.wt. and an acicular grain and/or a thin piece grain (mean grain size of 1 mm or less) 4.5% or less by volume ratio per the total amount of the cement and the pozzolanic fine powder.
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