Utilization of Thermal Power Plant Reverse Osmosis Concentrate in Road Construction

The results of studies on the use of thermal power plant reverse osmosis concentrate as a complex binding electrolyte to improve the physical and mechanical properties of stabilized soil are presented. The chemical composition of the reverse osmosis concentrate of Kazan CHP-2 and the water treatment process flow diagram are given. It is shown that the optimal dosage of the introduced concentrate is 0.1 % by mass, providing a compressive strength of 3.10 MPa, a flexural tensile strength of 0.84 MPa, and a frost resistance coefficient of 0.41 after 15 freeze–thaw cycles. The percentage increase in these characteristics was determined to be 30.25, 25.37, and 28.13, respectively. The prevented environmental damage from the discharge of reverse osmosis concentrate into water bodies as part of wastewater for KCHP-2 was calculated.