MODIFIED CONCRETES BASED ON NON-CLINKER BINDERS

Abstract

The study of the properties of high-strength concrete on the basis of new binders made from technogen waste is discussed. Theoretical provisions for the hardening of a clinker-free binder, consisting of co-crushed dump steel-smelting slag, cullet, a modifying aluminum-containing additive, and an alkaline component hardening under conditions of heat and moisture treatment, have been developed. The optimal compositions of clinker-free binder and fine-grained concrete based on it have been determined. At 25.0 MPa of the activity of the clinker-free binder, the composition contains (metallurgical waste) slag -52%; cullet - 37%; modifying aluminum-containing additive -11%; alkalis (activator) - 7.4% (by weight of the binder). It has been established that to obtain fine-grained concrete grade M 150, it is necessary: 25% clinker-free binder and 75% mixed aggregate, consisting of 35% steel-smelting waste slag and 65% sand. With a water / binder ratio of 0.33. Keywords: clinker-free cement, waste, modified concrete, metallurgical slag, glass-alkali binder, slag cement.