INVESTIGATION OF THE INFLUENCE OF APPLICATION OF BIOPLAST-1 PLASTICIZER ON FROST RESISTANCE OF CONCRETE

Abstract

Most concrete mixtures are made using plasticizers, which increase their mobility, and ease of filling , reducing energy and labor costs when laying in the formwork of monolithic building structures. Chemical additives are the main regulator of the structure of concrete and its pore space. Based on the general scientific classification of additives, it can be noted that each class of additives contributes to the impact on frost resistance. Plasticizing additives affect the formation of ice in the pores of concrete during freezing and thawing. In the presence of additives, a stable frost-resistant structure of the pore space of concrete is formed with a predominance of micropores and gel pores; the amount of ice during freezing decreases; and ultimate elongation, dynamic modulus of elasticity, and strength of concrete - increase.

LLC "Microbioprom" in Lutsk organized the production of biotechnological plasticizer for concrete, cement mortars, and other mortars "Bioplast-1". The plasticizer is made on the basis of ecologically safe biopolymers which form beneficial, safe microorganisms - cellulose type, lignin-pectin type (microfibers), hydrocarbon, protein type (polymer molecules), alkali metals (potassium, sodium), alkaline earth metals (calcium, magnesium), phosphorus compounds and other biocomponents. Bioplast-1 is a thick syrupy liquid of dark brown color with a concentration of 50 - 60%, and a density of 1.25 - 1.29 g / cm3. It is used to manufacture precast reinforced concrete prestressed and monolithic structures, for operation in non-aggressive and aggressive gas and water environments.

It is established that the use of plasticizer "Bioplast" increases the mobility of the concrete mixture, increases the class of concrete, and can reduce water consumption by up to 13%. The possibility of modification of heavy concrete due to the use of bioplastic plasticizer concrete "Bioplast-1" based on environmentally friendly biopolymers, which helps to increase the density of cement stone, resulting in increased frost resistance of concrete by at least 100 cycles.