METHOD OF PREPARING MIXTURE FOR SURFACE TREATMENT OF ROAD COVER, MIXTURE COMPOSITION AND METHOD OF ITS APPLICATION Russian patent published in 2002 - IPC

FIELD: building and exploitation of automobile roads. SUBSTANCE: method of preparing mixture for surface treatment of road cover involves mixing crushed stone with mineral powder in mixer, addition of bitumen to prepared mixture and stirring and characterized by that hot crushed stone of fraction 5-10 mm, or 5-15 mm, or 10-20 mm is fed to mixer and mixed with mineral powder for 20-30 s. Stirring prepared mixture after feeding hot bitumen is carried out for 20-30 s and discharge of ready mixture is carried out at temperature 190 C, not less. Mixture for surface treatment comprises the following components, wt. -%: crushed stone, 75-85; mineral powder, 15-25; bitumen, above 100%, 5.0-6.5. Method of application of mixture for surface treatment of road cover involves stacking the mentioned mixture by asphalt paver at its temperature 180 C, not less, by 20 mm layer, not above, and thickening by smooth-milled rollers. Invention can be used for surface treatment of road cover with formation of thin rough protective layer. EFFECT: improved method of preparing and application, valuable exploitation properties. 3 cl, 2 tbl, 5 ex