Process for the preparation of cement, mortars, concrete compositions containing a calcium carbonate-based filler treated with an ultrafine filler and a superplastifier, compositions and cement products obtained and their applications

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.