Alternatives to Seal Coats

Seal coats are one of many techniques commonly used for asphalt pavement preservation and chip seals are the most commonly used in Minnesota. In some applications, chip seals are not the best surface treatment alternative, such as in areas with frequent or high stress turning movements like cul-de-sacs or intersections, and can suffer chip loss and/or bleeding. The purpose of this Transportation Research Synthesis (TRS) was to summarize current seal coat practices and identify alternatives that provide pavement protection, extend pavement life similar to chip seals, and avoid the identified problems. Other surface treatment techniques used around the country include fog seals, bio seals, sand seals, sandwich seals, slurry seals, and micro surfacing and include many proprietary or brand name products. Essentially this TRS provides current practices providing the following for city and county engineers: (1) Description of the suite of surface treatment alternatives available on the market, and including material properties, costs, and typical life cycles when available. The term ‘life cycle’ is intended to include typical application frequency and the anticipated increase in pavement service life. (2) General guidelines to identify current practices and the technique(s) that are best suited for a particular project, including existing pavement condition factors and timing of initial sealing. (3) Provide current practices around expected outcomes of the various treatment methods and suggested measurement tool(s) that agencies can use to track surface treatment performance.


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  • Accession Number: 01593941
  • Record Type: Publication
  • Created Date: Mar 8 2016 9:59AM