ROAD CONCRETE MIX MAKING METHOD Russian patent published in 2014 - IPC C04B26/26 C04B40/00 C04B111/20 

FIELD: construction.

SUBSTANCE: method for making road concrete mix by mixing heated mineral components, bitumen and an additive using oil sludge differs by the fact that as an additive there used is fine-grained powder obtained by intense mixing of the working agent with oil sludge at their ratio of 1.5:1 with addition of water for complete lime slaking, where the working agent is obtained by mixing of the following components, wt %: animal fat 1-3, adsorbent - thermally treated shells 18-22, unslacked lime ground to 10^-3÷10^-5 m is the rest at bitumen content of 67-84% of the weight of the above additive, mineral components are heated to 70-90°C, mixture of bitumen with the above additive is up to 90-100°C, and mixing of all mixture components is performed at heating of up to 140-170°C.

EFFECT: enlarging the range of road concrete mixes.

4 ex, 1 tbl