ASPHALT RECYCLING REJUVENATION ADDITIVES
Adding Oils: Whether you're repaving driveways or repairing roadways and parking lots, you need to be confident that you've taken steps to improve the quality of your recycled asphalt. Your RAP (reclaimed asphalt pavement) pile is often depleted of essential oils. This occurs when, over time, oxidation from the sun damages the long-chain hydrocarbon molecules in your pavement. Adding liquid oils may help to soften the asphalt and improve workability making it easier to rake, but adding oil doesn't always improve hot mix quality. Adding too much oil can negatively impact mix performance.
Adding AC: Another option is to add Asphalt Cement, perhaps even the same material the hot mix plants use when batching hot mix asphalt. Considering that asphalt cement has to be heated to very high temeratures, the option of using AC is impractical. You're running a small asphalt recycling operation for the convenience of having hot mix on demand and reducing hot mix costs. Heating asphalt cement requires a costly investment of fuel along with a diesel or propane-heated storage tank and hot AC liquid pumping system. This is totally impractical, unless you have a very large recycling plant.
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