Premix dry binder, useful to form concrete composition used in the construction industry, comprises clinker in the form of grains; binder materials different from the clinker; and complementary materials

摘要

Premix dry binder (I) comprises: clinker (A) (15-40%, preferably 20-35%) in the form of grains with a volume particle size (Dv)97 of = 30 mu m; binder materials (B) (8-35%, preferably 15-30%) different from the clinker; and complementary materials (C) (30-70%, preferably 35-65%) with a Dv90 of = 200 mu m. Independent claims are included for: (1) a dry binder mixture (II) comprising, 5-30%, preferably 10-20% of (I); and 70-95%, preferably 80-90% of granulates; (2) a wet concrete composition comprising 5-30%, preferably 10-20% of (I); and 70-95%, preferably 80-90% of granulates, where the percentages are corresponding to proportions compared to the total dry mass; (3) a hardened concrete object obtained using (I); and (4) the preparation of the wet concrete composition comprising mixing the ingredients of the composition with water; or mixing of premixture of (I) with granulates and water.