High-strength concretes with special aggregates for the protection of technological equipment

Abstract

The use of a larger percentage of protected equipment will make it possible to increase the repair intervals, improve product quality, reduce the cost of repair and replacement of equipment. High-strength concrete is a highly effective structural material, the properties of which can be controlled within fairly large limits and used as a protective material. In high-strength concrete, the main parameters that affect the strength of concrete are optimized: high-strength cement, fractionated aggregate with high impact strength, fiber for micro-reinforcement of the concrete structure and prevention of cracking, increased thermal resistance of the composite. The increase in the quality indicators of high-strength concrete compared to ordinary concrete is determined by the following indicators: an increase in tensile strength ‒ 2.5 times; an increase in impact strength ‒ 10 times; an increase in crack resistance ‒ 5...6 times. Due to their strength properties, products made using high-strength concrete (lined pipes, elbows, tees, crosses, gutters) withstand loads significantly exceeding 5 MPa and can therefore be widely used to protect equipment from abrasive wear, aggressive environments, and high temperatures, as confirmed by many years of experience in using such products in various industries, ensuring a 2…6 fold increase in equipment service life. The production of high-strength concrete is only possible in conditions of high production culture with the provision of technology for the preparation and dosing of aggregates, cement, additives from dispersed mineral and polymer components, which allow predicting and regulating the physicochemical processes of interaction and structure formation.