Patent ID: 8663516

Claim:
A process of manufacturing a block of material for construction, the process comprising the steps of: mixing aggregates comprising at least one of calcium carbonate and magnesium carbonate with water to form an aqueous mixture; transfer the aqueous mixture in a pressurized, hermetically sealed reactor; introducing an acid gas or gas produced by an acid in the reactor in order to form at least one of calcium bicarbonate and magnesium bicarbonate reacting with at least one of calcium carbonate and magnesium carbonate from the mixing aggregates; transferring the reaction product into a mold comprising a set of vents and increasing a compression pressure of the mold (P e ) to reach the shrinkage pressure (P def ) having a value of about 3 to 6 Mpa and allow the excess carbon dioxide gas and water to get out of the mold through the set of vents, increasing the compression pressure of the mold (P e ) above an inducing pressure value (P fix )of between approximately 5 to 50 Mpa in order to induce an exchange reaction with the water and the dissolved species to favor dissolution at least of one of calcium carbonate and magnesium carbonate, and increasing the compression pressure of the mold (P e ) until obtaining a maximum compactness of the mix; and progressively depressurizing the mold and extracting the block of material obtained; and curing the block of material over a curing period during which at least one of the calcium bicarbonate and the magnesium bicarbonate crystallize in at least one of calcium carbonate and magnesium carbonate and create an endogenous binder between the grains to allow the solidification of the block of material obtained.