An Air-Impact Method for Mechanochemical Activation of Secondary Raw Materials in the Production of Building Materials

An effective air-impact method for mechanochemical processes of activation of secondary raw materials in the production of building materials has been proposed. In order to increase the specific surface area of the binder and accelerate the strength gain of fast-hardening concrete mixtures, a model for calculating aeroactivators has been created on the basis of new technological equipment for activating cement, sand, and production waste. The proposed model establishes the dependence of the destruction rate of the contaminating shell of particles on the mechanical impact of the blows and physical–mechanical characteristics of the materials. To improve the performance characteristics of the aeroactivator, experimental studies have been carried out, the results of which made it possible to determine rational parameters of the improved installation and confirm the correctness of the developed design.