Fog seals are a method of adding asphalt to an existing pavement surface to improve sealing or waterproofing, prevent further stone loss by holding aggregate in place, or simply improve the surface appearance. However, inappropriate use can result in slick pavements and tracking of excess material.
The Asphalt Emulsion Manufacturers Association (AEMA) defines a fog seal as “a light spray application of dilute asphalt emulsion used primarily to seal an existing asphalt surface to reduce raveling and enrich dry and weathered surfaces” (1). Others refer to fog seals as enrichment treatments since they add fresh asphalt to an aged surface and lengthen the pavement surface life (2). Fog seals are also useful in chip seal applications to hold chips in place in fresh seal coats. These are referred to as flush coats. This can help prevent vehicle damage arising from flying chips. The Asphalt Institute also adds that fog seals can seal small cracks (3).
California. Dept. of Transportation. Division of Maintenance
2003-10-01
Abstract:
This document provides an overview of the types of microsurfacing presently used in California, including information on materials and specifications,...
California. Dept. of Transportation. Division of Maintenance
2003-10-01
Abstract:
A bonded wearing course (BWC) is a gap graded, ultra thin hot-mix asphalt (HMA) mixture appliedover a thick polymer modified asphalt emulsion membrane...
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