A method and composition for making concrete elements having remarkable compressive strength and fracturing energy and elements thereby obtained.

摘要

The invention relates to obtaining a concrete having a compressive strength of at least 400 MPa and a fracturing energy of at least 1000 J / m2. BR/ A mixture containing mainly cement, fine sand, amorphous silica, crushed quartz, steel wool, a thinning agent, and water in specific proportions is kneaded and, after the setting the concrete is baked at a temperature of at least 250 ° C. The figure is a micrograph showing the microstructure of a concrete according to the invention. BR/ The invention makes it possible in particular to produce parts replacing the steel, for example anchoring heads of prestressing cables.