CONCRETE WITH LOW CLINKER CONTENT Russian patent published in 2014 - IPC C04B28/04 C04B111/20 C04B7/13 

FIELD: chemistry.

SUBSTANCE: subject of the present invention is a dry binder premix which contains the following, wt %: portland clinker having a Blaine specific surface area of 4500 to 9500 cm²/g, preferably 5500 to 8000 cm²/g, the minimum quantity of the clinker by mass percentage relative to the total mass of the premix being determined according to formula (I): [-6.10^-3×SSB_k]+75, in which SSB_k is the Blaine specific surface area given in cm²/g; fly ash; at least one alkali metal sulphate, the quantity of alkali metal sulphate being such that the quantity of equivalent Na₂O in the premix is greater than or equal to 5 wt% relative to the mass of fly ash; at least one source of SO₃, in a quantity such that the quantity of SO₃ in the premix is greater than or equal to 2 wt % by relative to the mass of portland clinker; complementary materials having a Dv90 less than or equal to 200 mcm selected from limestone powders, the quantity of clinker+the quantity of fly ash being greater than or equal to 75 wt %, preferably 78 wt %, relative to the total mass of the premix; the total quantity of clinker in the premix being strictly less than 60 wt % relative to the total mass of the premix. The subject of the invention is also a dry binder mix obtained by mixing said premix with aggregates, as well as a concrete grout composition obtained by mixing with water.

EFFECT: obtaining concrete with low carbon dioxide emission.

13 cl, 1 dwg, 3 tbl