A fine fraction from the recycled concrete as an addition in the cement composites

The aim of the research was to determine the possibility of using the fine fraction from the recycled concrete to produce the cement composites. The research was based on a rotal plan with two variables: x1 (the amount of the recycled addition, 0-40% c. m.) and x2 (the amount of the superplasticizer, 0-1% c. m.). The recycled material was ground to 0.125 mm and roasted at 700°C. The statistical analysis of the findings led to the conclusion that the recycled fine fraction can be added to the cement composites (up to 20% of the cement mass) without a significant decline in their parameters’ values