Patent ID: 6883609

Claim:
A cement obtained after setting a slurry comprising: a solid fraction constituted by: 35% to 80% (by volume) of particles with a size in the range 100μ to 800μ; 0% to 15% (by volume) of particles with a diameter in the range 0.1μ to 10μ ; and 10% to 40% (by volume) of particles with a diameter in the range 20μ to 50μ; a fraction of said solid particles being constituted by a cement; a liquid fraction in a water/solid ratio in the range 38% to 50% by volume; a percentage of cells, provided by a gas or a liquid which is not miscible with water, in the range 30% to 60% of the final volume of the slurry. said cement having a compressive strength of more than 3.4 MPa and a water permeability of more than 1 Darcy.