The paper presents investigations with regard to the influence of the surfactant additive HEA2 (triethanolamine acetate) on the specific power consumption at grinding, the particle size distribution and the mechanical properties of unitary cements and with addition of blast furnace slag with advanced fineness. The additive was dosed in three different ratios (0.03%, 0.05% and 0.1%), reported at the weight of cement subject to grinding. Grinding fineness of the cements, expressed through Blaine specific surface, was of 8000 cm²/g. It was found that even if grinding the blast furnace slag and the blast furnace slag cement were carried out without any surfactant, the power consumption was lower than when grinding the ordinary Portland cement. The effect of the surfactant on the specific power consumption at grinding is greater for the ordinary Portland cement than for the blast furnace slag cementIn terms of the surfactant effect on the particle size distribution, HEA2 was found to lead to a particle size distribution gliding towards finer fractions, namely, to a higher ratio of the fractions smaller than 3 and 16 microns, respectively, as compared to the reference cement (without additive).

Using of the additive HEA2 at grinding of the cements with addition of blast furnace slag lead to increasing of mechanical strengths at compression, at all hardening terms, in comparison with etalon cements.