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AssigneeOmya International AG
InventorsMichael Skovby, Pascal Gonnon
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Process for the preparation of cement/mortar/concrete compositions or systems, (for simplicity hereafter “cement” compositions or systems or even “cements”), of a generally known type containing low or medium (standard) “filler(s)”, and/or optionally HP filler(s), as carbonate-based filler(s), namely coarse low or medium calcium carbonate(s), namely coarse marble(s); Product comprising, or consisting of, the pre-blend (A) of coarse, low or medium (or optionally HP) “calcium carbonate-based filler” pre-blended with at least an UF; Aqueous compositions (B) obtained by mixing the above pre-blend (A) of coarse filler(s) with UF(s) with an aqueous system such as mix water, aqueous mix fluid; Product (C) consisting of, or comprising, the pre-blend (A) or the compositions (B), treated or pretreated with at least one superplastifier or aqueous system containing superplastifier(s); Cement and Use of cement.
A process for preparing a cement composition comprising introducing during the manufacture of a cement composition as a filler a blend of a coarse calcium carbonate—comprising filler and an ultrafine filler, wherein the blend is treated with at least one treating agent comprising at least one superplastifier before being introduced into the cement composition, wherein the coarse calcium-carbonate comprising filler has a d50>6 microns, and the ultrafine filler has a d50 from 1 to 6 microns and a Blaine of greater than 1000 m2/kg, and wherein the cement composition so prepared comprises cement, said blend treated with said treating agent as a filler, optionally aggregates selected from the group consisting of sand and gravel, and optionally one or more additives.
The process according to according to 1, wherein superplastifier is a polycarboxylate, a polycarboxylate ether, or a product manufactured from sulfonated naphthalene condensate or sulfonated melamine formaldehyde.
Dependencies are inferred from the claim text.