METHOD OF COLD RECOVERY FOR PAVEMENT CLOTHING LAYER Russian patent published in 2008 - IPC E01C7/18 

FIELD: construction, road works.

SUBSTANCE: invention is attributed to road repair works and can be used for asphalt concrete recovery during repairing of pavement clothing for highways, municipal roads, pavements, areas, etc. Method of cold recovery for road clothing layers includes loosening of road clothing layers while adding necessary quantities of broken stone, sand, bonding substance and water and compaction of road clothing. As bonding substance, unhydrated lime carbonate is used. It is distributed onto old layer before recovery of road clothing layer while adding necessary quantities of broken stone and sand depending on grain size of road clothing layer being recovered, and water is added during recovery depending on humidity of road clothing layer being recovered and amount of bonding substance. Amount of substance and water and compaction of road clothing constitutes 2.5-3.0% of recovered road clothing layer mass.

EFFECT: increase in bearing capability, enhancement of mechanical and physical properties of road clothing structural layers and lowered energy and labour consumption for road repair works carried out by cold recovery method.

4 cl, 3 tbl, 2 dwg