ANALYZING THE INFLUENCE OF COMPLEX ORGANOMINERAL ADDITIVES ON THE PHYSICAL AND MECHANICAL PARAMETERS OF MODIFIED FINE-GRAINED CONCRETE

The results of analyzing the effect of complex organomineral additives (OMA) on physical and mechanical properties of fine-grained concrete were presented. The OMA composition included: poly-mineral clay of Nikitskoy clay deposit of the Republic of Mordovia (MA), fired for 2 hours at 700°C, polycarboxylates ester SINTEFLOW MEGA 52 and a mixture com-position based on isopropanolamines ESP800 produced by “Syntez Oka - Construction Chemistry” LLC. The following factors were investigated as varying factors: grinding duration of polymineral clay (2-4 hours), polycarboxylates ester con-tent (0.15-0.35% by mass of MA) and isopropanolamines-based blending composition (0.1-0.25% by mass of MA). OMA complexes have been identified, the use of which in the compositions of fine-grained cement concretes makes it possible to obtain composites with strength characteristics not inferior to additive-free concrete. It is shown that due to the introduc-tion of polycarboxylates ester SINTEFLOW MEGA 52 and mixture composition based on isopropanolamines ESP800 in addition to mineral additives on the basis of fired clay raw materials (20% by mass of cement) into the OMA composition, it is possible to increase the tensile strength in bending, strength and modulus of elasticity in compression of fine-grained cement concrete up to 11, 30 and 40%, respectively.