Development of a new generation of concrete mixtures based on a technogenic microfiller and a polifunctional additive for low and non-heat-free technologies of making reinforced concrete products

Abstract

The article examines the development of energy- and resource-saving concrete mixtures using a technogenic finely dispersed aggregate - steelmaking waste (SPO) and a new generation polyfunctional additive (PFD) (superplasticizers based on polycarboxylate ethers). Research has been conducted on the physical, mechanical, and operational properties of the reinforcement, including its porous structure, water resistance, frost resistance, corrosion resistance, shrinkage deformations, and heat treatment regimes. The obtained results confirm that the modified compositions have improved characteristics: a decrease in total porosity to 10.42% (compared to 14.91% in the control), an increase in the modulus of elasticity and strength, an increase in resistance to acid-base and sulfate influences, and a decrease in shrinkage deformations by 21-33%. It was determined that the implementation of these technologies is expedient in the context of modernizing the construction industry of Uzbekistan and corresponds to the tasks of the "green economy."