METHOD OF MAKING ROAD CONCRETE MIX USING PRODUCTS OF PROCESSING USED ASPHALT CONCRETE Russian patent published in 2012 - IPC C08L95/00 C10C3/00 C04B26/26 

FIELD: process engineering.

SUBSTANCE: invention is intended for use in construction, production of construction materials, etc. Proposed method comprises crushing used rod concrete mix, feeding its parts into heated coarse mineral mix of gravel and mixing. Prior to adding used and crushed old concrete mix into said heated coarse mineral portion of gravel, cover composition making a shell of bitumen and mineral powder mix is applied on its 10-20 mm-particles. Mineral powder-to-bitumen ratio makes 1:3 to 1:6. Then, thin layer of mineral powder is applied on the surface of produced particles. Then, produced particles are mixed with preheated gravel. Note here that relation between used road concrete mix and shell material makes 5:1 and 10:1 while used concrete mix makes 10-20% of coarse mineral part. Produced asphalt concrete features homogeneous structure and meets all requirements to strength, water resistance and life. Application thin layer of mineral powder on the surface of particles rules out their sticking, hence, adding to ease of storage and transportation.

EFFECT: decreased consumption of bitumen and mineral part.

4 cl, 1 tbl, 1 ex