Composite concrete

A method for preparing an impact resistant concrete composition, which contains an admixture of a hydraulic binder, aggregates, and metal fibers, said composition comprising:

• a) from 70 to 86% of particles (A) having a particle size distribution which ranges from 0.01-3 mm to 0.01-50 mm,
• b) from 2 to 10% of particles (B) having particle size of between 0.01 and 1 .mu.m,
• c) from 0 to 12% of particles (C), wherein the majority of the particles are of the size between 1 and 10 .mu.m,
• d) from 3 to 20% of hydraulic binder,
• e) from 0.1 to 3% of a dispersant or of a plasticizer,
• f) from 0.05 to 8.5% of fibers, and
• g) from 2 to 5% of water, the percentage of all being percentages by weight relative to the sum of the weights of constituents a) to e), the method comprising the steps of:
• mixing the particles (A), the particles (B), the particles (C), the hydraulic binder, the dispersant or plasticizer, and the water to form a mix;
• adding and uniformly dispersing the fibers in the mix;
• and, casting the mix into a mold.