METHOD OF PREPARING BLACK CHIPPINGS Russian patent published in 2012 - IPC C04B26/26 C08L95/00 

FIELD: chemistry.

SUBSTANCE: invention relates to road construction materials and can be used in bottoming and paving roads. The method involves saturation of crushed limestone dried to constant mass with viscous bitumen molten at 110-120°C, in the presence of a product of reaction of boric acid, diethanolamine and a mixture of plant oil fatty acids of the C₆-C₂₀ fraction with molar ratio of reagents equal to 1:3:(0.5-2.5), respectively, taken in amount of 0.5-2.0 wt % with respect to the weight of bitumen, with bitumen consumption of 1.5-2.0 wt % with respect to the weight of chippings.

EFFECT: high fungus resistance, reduced water absorption of the black chippings and simple method of preparing said chippings.

5 ex, 2 tbl