WARM MIX ASPHALT BINDER COMPOSITIONS CONTAINING LUBRICATING ADDITIVES

摘要

The present invention provides a functionally dry warm mix asphalt binder composition modified with lubricating agents or additives that can be mixed with aggregate and compacted at temperatures substantially below asphalt binder compositions that do not contain the disclosed lubricating additives.

主权项

1. A paving process comprising:
(a) adding a lubricating additive comprising lubricating surfactant, lubricating non-surfactant, lubricating acid or combination thereof to functionally dry, essentially water-free, non-foamed asphalt binder containing less than 5 wt. % water and heated to a warm mix temperature to create a warm mix lubricated asphalt binder composition, and if the lubricating additive in the warm mix lubricated asphalt binder composition comprises a lubricating wax, then the lubricating wax is 0.5 wt. % or less of the asphalt binder weight; (b) combining the warm mix lubricated asphalt binder composition with aggregate and RAP; (c) mixing to coat the aggregate and RAP with the lubricated asphalt binder composition to form a warm mix paving material at a warm mix temperature that is lower than a comparison temperature needed to produce a comparison paving material without the lubricating additive; (d) transferring the warm mix paving material to a paving machine; (e) applying the warm mix paving material with the paving machine to a prepared surface at a warm mix paving temperature; and then (f) compacting the applied paving material to form a paved surface.