Composite binder with energy-saving raw materials for high-strength concrete

Abstract

In this paper, from the position of the scientific direction of geonics «geomimetics», the issue of increasing the efficiency of high-strength self-compacting concrete through the use of waste building materials in the form of ceramic brick, heavy concrete scrap and gas silicate is considered. It has been established that the use of concrete scrap crushing screening in the composition of the raw mixture contributes to the increase of the concrete's resistance to delamination and water separation at optimal rheological properties with the improvement of the physico-mechanical properties of composite binder and fine-grained concrete based on it. It is possible to save up to 30% of Portland cement as part of a composite binder when replacing it with man-made raw materials. The maximum effect of self-sealing of the raw mixture is sufficiently manifested when using a ceramic brick fight. However, in combination with the characteristics of maximum strength and grinding capacity, the use of finely ground concrete scrap is preferable. The research is aimed at maximizing the resource potential of technogenic raw materials in the form of screenings of crushing fragments of buildings and structures formed as a result of the renovation of the country's construction complex, as well as in the liberated territories of the LPR and DPR.