Polimerinių priedų įtaka C12/15 klasės betono savybėms ; Impact of Polymer Additives on the Properties of the Class C12/15 Concrete

Research object – class C12/15 concrete, modified by polymers Penosil Premium BetPrimer, Sika Cim and Cerezit CT 17. Aim of research – to determine the impact of polymer additives SikaCim, Penosil Premium BetPrimer and Cerezit CT17 on the properties of the class C12/15 concrete. Tasks to be solved: 6. To determine the impact of polymer additives on water absorption of concrete; 7. To evaluate the influence of polymer additives on the compressive strength of concrete; 8. To carry out laboratory and empirical studies on the frost resistance (using formulas) of concrete modified by polymeric additives; 9. To determine the impact of curing conditions on concrete modified by polymeric additives; 10. To determine the suitability of investigated polymer materials on concrete modification. Reinforced concrete and concrete constructions of hydraulic structures are under constant impact of internal and external factors. The rapid advances in the construction sector are increasingly opting to use chemicals in the concrete for the building to better withstand the external and internal factors. Physical and mechanical properties (absorption, compressive strength, frost resistance, etc.) of concrete modified by polymer additives Sika CIM, and CT17 Cerezit Penosil Premium BetPrimer were examined in this work. After the addition of different amounts of these additives in the concrete observational studies of the evolution of the material properties were made. Research has shown that polymer additive Cim Sika increased compressive strength of concrete by 27% (when cured in the open air) and by 17% (when cured in the water). Concrete class increased from C12/15 to C16/20. Water absorption of the samples, which were cured in the open air, remained the same and water absorption of the samples, which were cured in the water, increased by 10%. The frost resistance mark of concrete specimens, which were cured in the open air and water, increased from 50 F to 100 F. Samples with an additive Penosil Premium BetPrimer, which were cured in the open air and water, reduced the compressive strength of concrete by 45% and 49%, respectively, water absorption of the samples, which were cured in water, increased by 19% and of the samples, which were cured in the open air, reduced by 18%. Samples with an additive Cerezit CT17, which were cured in the open air and water, increased the compressive strength of concrete by 8 % and 6 %, respectively, and water absorption – by 9 % and 15 %. The frost resistance mark of concrete samples increased up to F 100, and frost resistance mark of concrete specimens, which were cured in water, remained the same F 50.