Patent ID: 6860935
Filing Date: 2005-03-01
Classification: C04B,E04C

Abstract:
1. A fiber/cement composite, the cementitious matrix of which has a compressive strength of greater than 150 MPa and a uniaxial tensile strength of greater than or equal to 6 MPa, this matrix having a water/binder ratio of less than or equal to 0.25 and consisting of a mix of cement, aggregates, fine pozzolans, the particles of which have sizes of between 0.1 μm and 1 μm, and a plasticizer, this composite including a reinforcement comprising metal fibers embedded in the cementitious matrix, wherein the reinforcement comprises at least three types of fiber: a) long fibers made of wire-drawn steel, having a tensile strength of greater than 1500 MPa, a length of between 15 and 25 mm and a diameter of between 0.25 and 0.30 mm, in a percentage by volume of between 0.5 and 3%; b) medium fibers made of wire-drawn steel, having a tensile strength of greater than 1500 MPa, a length of between 5 and 10 mm and a diameter of between 0.15 and 0.2 mm, in a percentage by volume of between 4 and 7%; and c) short fine metal fibers having a length of less than 3 mm, in a percentage by volume of between 1.5% and 5%.