Effect on concrete of plasticizing agents based on brown coal and peat wastes

To investigate the use of highly effective plasticizing agents that reduce the water requirements of concrete mixes, change the time of their setting, reduce water release and separation, improve the structure and physical and technical properties of hardened solutions and concrete, increase their durability. As nondeficient and cheap raw materials for the industrial production of plasticizing agents, it is advisable to use brown coal wastes in the production of mountain wax-carbon alkaline reagent (CAR) and peat plasticizer – (PP). Methods. For the modification of CAR and PP wastes of soap and oil-and-fat production – soap solutions (SS) as well as neutralized waste from desulfurization shops of coke production were used. As a result, modified CAR−1 and PP−2 agents were obtained. Soap solution keeps limiting fatty acids in the form of sodium salts as an active component and, being introduced into a concrete mix, it gives concrete positive properties (accelerate hardening, increase frost resistance), but they have weak plasticizing properties. The analysis of the modification of CAR and PP which keeps their positive properties with unchanged or increased strength of concrete. Results. The possibility of using industrial waste of soap (or oil and fat) and coke chemical production as agents in concrete in the manufacture of reinforced concrete products is analyzed. Practical relevance. The use of complex plasticizers CAR and PP−2 allows to dispose industrial waste and contributes to the protection of the environment from pollution. Agents CAR−1 and PP−2 on the basis of industrial waste are efficient for the production of high-slump and cast concrete mixes without the cost of concrete strength, reducing the vibrocompaction while molding the products by 1.5...2 times compared with plain concrete mixes and improving the quality of reinforced concrete products.