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US 8,834,626 B2Granted
Impurity inerting composition
AssigneeLafarge
InventorsAlain Jacquet, Emmanuel Villard, Olivier Watt
Life of this patent
Estimating the term…
Abstract
A method for inerting clays in sands which are intended for the preparation of hydraulic compositions, the method including a step of adding to the hydraulic composition, or to one of the constituents thereof, a composition which may include at least 50% by weight of a cationic polymer which has a density of cationic charges which is greater than 0.5 meq/g and an intrinsic viscosity which is less than 1 dl/g as an active substance. The hydraulic composition may be a concrete or a mortar.
Claims29
A method for inerting clays in sands used in the preparation of a hydraulic composition, comprising the steps of:
- adding the sands to the hydraulic composition, the sands having a clay content of from 0.5 to 5% by weight, and adding a composition to the hydraulic composition, or to one of the constituents thereof, the composition comprising at least 50% by weight of a cationic polymer having a density of cationic charges greater than 0.5 meq/g and an intrinsic viscosity less than 1 dl/g as an active substance.
Dependencies are inferred from the claim text.