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 cm 2 /g, preferably 5500 to 8000 cm 2 /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 ...