FAST-HARDENING MORTAR COMPOSITIONS

Abstract

Based on the analysis of literary sources characterizing the current trends and the physical and mechanical foundations for the development of special building materials, the possibility of creating a mortar for a 3d building printer is theoretically substantiated, which provides the intensity of hardening and stability of performance indicators due to the formation of its structure using a composite binder. The obtained results indicate that on the basis of the developed gypsum cement slag binders it is possible to obtain fast-hardening mortar compositions, which are characterized by increased strength and thermal resistance and in their physical and mechanical characteristics are not inferior to ordinary ceramic bricks. Thus, the conducted studies have shown the possibility of obtaining on the basis of gypsum cement slag binder modified with the addition of a superplasticizer on a polycorboxylate basis of fast-hardening mortar compositions that can be used as working mixtures for a 3D printer. On the basis of developed mortar compositions, it is possible to perform high-speed erection of buildings and structures for civilian purposes. In the operation of buildings and structures, there is often a need for the rapid restoration of load bearing capacity and certain operational properties of damaged structures. In this connection, another promising direction of using fast-hardening mortar compositions based on gypsum cement slag binder is repair of damaged concrete and reinforced concrete structures.