Efficiency Improvement of Heat-resistant Concrete through the Use of Sludge Technogenic Raw Material

The research results on heat-resistant concrete made of mixed binding material, including Portland cement, aluminum and chrome waste, nano-technogenic raw materials in the form of sludge aluminum caustic etch are presented. The presence of aluminous component in the floured heat-resisting additive with different dimensions made it possible to bind the full calcium oxide as part of a mixed heat-resistant binder. The data on phosphate binders synthesizing is provided. The application of nano-technogenic raw materials in the form of sludge provided the completeness of the synthesizing liquid phosphate bonds process, excluding external heating. The obtained aluminophosphate bond was used in the compositions of heavy heat-resistant concrete and in the structural and chemical modification of piece ceramic refractories. The use of liquid aluminophosphate bonds in the structural and chemical modification of fireclay and high-alumina refractories instead of pure phosphoric acid has significantly increased their technical efficiency. Aluminophosphate bond application in the compositions of heat-resistant lining materials has considerably increased their physical and thermal performance.