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... 1 S u m m a r y Background Asphalt preservation surface treatments (PSTs) are an effective means of improving surface quality and extending the service life of pavements.
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... 2 Performance-related Specifications for Emulsified asphaltic Binders used in Preservation Surface Treatments seals, microsurfacing, and spray seals. The following research activities were performed to support the development of the proposed EPG specifications: • Define the most relevant causes of failure for each PST type.

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