METHOD OF PROTECTIVE COATING APPLICATION Russian patent published in 2008 - IPC E01C3/04 E02D3/12 

FIELD: technological processes.

SUBSTANCE: invention is related to disposal of oil production wastes and may be used in construction and operation of oil and gas pipelines, roads, major power supply systems and high voltage power lines as coating. Method of protective coating application includes application of astringent agent on soil surface with further drying at temperature of at least 20°C. As astringent material oil production wastes are used that contain oil in amount of 35-60%, water in amount of 15-25% and remaining is hard inclusions. Application of oil production wastes on soil surface is carried out layerwise, at that number of layers makes at least 5 and thickness of every layer is at least 1 mm. At that drying of every applied layer of oil production wastes continues for at least 6 hours.

EFFECT: creation of protective coating on soils, which provides availability of vegetation-free surfaces, including guard zones of power lines, and provides higher water-resisting and strengthening effects.

3 cl, 3 ex, 3 tbl