Road American
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In a typical pavement, bitumen emulsion is used as a tack coat between asphalt lifts to ensure bonding, and sometimes as a prime coat on granular bases or as a binder in surface dressing or slurry seal layers. Placement depends on design: tack coats are thin and uniform, while surface dressing uses emulsion plus aggregate to create a wearing surface. The emulsion must break and cure before the next layer to avoid slippage or stripping.
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