Influence of polymeric additives on the propertles of concrete manufactured on the basis of aggregates produced from crushed concrete waste

Abstract

The research is devoted to the analysis of the injluence of various polymeric additives on the properties of hardened concrete with aggregate made from concrete waste. The following materials were used during the research: coarse aggregate - crushed concrete waste, fine aggregate - natural sand with 0.110.5 mm fraction and crushed concrete waste with particlest size of 0.125-4 mm, composite Port/and limestone cement, water and 4 polymeric additives. 9 compositions of concrete mixtures were produced: the reference mixture and 4 concrete mixtures prepared by adding 1 % and 2 % (of the cement mass) from each of the polymeric additives. During the calculation of concrete composition, the selected slumping class of the concrete mixture was Sl, and compressive strength class of the hardened concrete - C25130. The following parameters of concrete samples were determined during the research: density, compressive strength, bending strength, water absorption, structural properties. Forecasted performance frost resistance was calculated and frost resistance was determined, as weil as the alkali corrosion of concrete samples was analysed.