Patent ID: 7316743

Claim:
A solid mixture for the preparation of concrete with a compression strength after 28 days that is greater than or equal to 110 MPa, comprising cement, calcareous aggregates and acrylic or naphthalenesulphonate admixture, and pozzolan additions in amount from 0% to 5% by weight of cement, wherein the particle-size distribution of the mixture is shown on the graph of the cumulative percentage of passing material according to the size of the particles in mm, from a curve that substantially corresponds to the values shown in the following table: Diameter (mm) Undersize % 0.002 5-12 0.005 10-13 0.01 15-20 0.1 30-40 0.2 40-60 0.4 50-75 0.7 60-85 1 70-90 2 85-95.