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Fog Sealing Older Pavements

Posted by Graniterock on Mar 18, 2015

In its “A Basic Asphalt Emulsion Manual”, the Asphalt Emulsion Manufacturers Association and the Asphalt Institute describe a fog seal as a “light application of slow-setting emulsion sprayed on an existing asphalt surface.” Properly applied and applied at the right time, a fog seal can be a valuable aid in the maintenance of an asphalt pavement. The question is, what is the proper application and when is the right time to use fog seals in a pavement maintenance program?
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Tender Pavements

Posted by Graniterock on Mar 18, 2015

A tender or slow-setting asphalt pavement is defined as one that scuffs under horizontally applied shearing loads after compaction has been completed, such as when power steering turns are made by a stationary vehicle. There are several causes of “tender pavements” including a faulty mix design, low compaction, and liquid asphalt saturation. Although each of these causes contributes to tender pavement, the most common root cause of a tender asphalt pavement is premature application of a preventive maintenance surface treatment (i.e. sealcoat, slurry seal, chip seal).
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