STUDY OF STRENGTH CHARACTERISTICS OF FINE-GRAINED CONCRETE ON SLAG SAND

Abstract

The study relates to the issues of blast furnace waste disposal and resource conservation in the context of developing construction technologies for the production of fine-grained concrete. The development of industrial and civil construction envisages the wide use of various construction composites. Such materials include blast furnace granulated slag obtained in metallurgical production. Slag screenings are obtained by grinding slag and separating it into fractions (by grain size) by sifting. It should be noted that the amount of slag sand can reach 35–40% of the total mass of the processed material. Obviously, its use in construction can give a significant economic effect. Blast furnace granulated slag is used to produce various types of concrete. Increasing the efficiency of blast furnace slag use in the field of creating high-strength concrete is an urgent task of construction materials science. Specialists from Cherepovets State University have conducted experimental laboratory studies on the production and analysis of the properties of effective fine-grained slag concretes, which additionally contain a chemical modifying additive based on magnesium oxide. An experimental composition with increased crack resistance and compressive strength of up to 15% was obtained. The developed composition of fine-grained concrete demonstrates significant potential for use in construction. The use of a modifying additive based on magnesium oxide and slag sand not only improves the technical characteristics of the material, but also helps solve environmental problems. The introduction of the technology will reduce concrete production costs by 15–20%. The results obtained can be adapted and used in construction technologies and the production of building composites.