CONCRETE COMPRISING ORGANIC FIBER DISPERSED IN CONCRETE MATRIX, CONCRETE CEMENT MATRIX AND PREMIX

摘要

PROBLEM TO BE SOLVED: To provide a concrete mix comprising an organic fiber for reinforcement and particularly having improved tensile strength (bending and direct tensile strength) compared to concrete mix produced by a conventional technology.

SOLUTION: The concrete mix is obtained by dispersing an organic fiber and mixing water with a composition comprising (a) cement, (b) a granular element comprising 20-60 mass% of cement matrix, (c) a fine element with a pozzolanic reaction and (d) at least a dispersing agent in addition to the organic fiber, wherein the granular element (b) has 2 mm particle diameter at the maximum and the fine element (c) with pozzolanic reaction has 20 μm particle diameter at the maximum. Further, the weight percentage of water to the added weight of the cement (a) and the fine pozzolanic reaction element (c) is in the range between 8% and 25% and the organic fiber has an individual length I of at least 2 mm and an I/ψ ratio, (ψ) being the fiber diameter, of at least 20.

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