Aggregate loss in asphalt surface treatments has been a major problem in Alaska. A study completed in 1982 entitled "Performance of Bituminous Surface Treatments" recommended specification changes. Most important of these was the adoption of the McLeod design method and limiting the construction season. The project reviewed these recommendations by constructing test sections. The McLeod design method provides an excellant starting point for asphalt and aggregate spread rates. It is further recommended that the percent passing the No. 200 sieve be reduced to 0.5 percent. A survey of seal coating practices and philosophies was also made. Most states feel that surface sealing is economically desirable. Maintenance funds are normally used.
Building and maintaining an effective highway system is important to safeguard the mobility and safety of the traveling public, as well as to support ...
Every year Hot Mix Asphalt (HMA) roadways are rehabilitated by milling the existing roadway and replacing the milled portion with new HMA. As a result...
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United States Department of Transportation
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