FHWA User Guidelines

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Asphalt Concrete Description:
http://www.rmrc.unh.edu/tools/uguidelines/app.asp#asp

Foundry Sand in Asphalt Concrete:
http://www.rmrc.unh.edu/tools/uguidelines/fs2.asp

Foundry Sand Facts for Civil Engineers
http://www.afslibrary.com/Home/Results/Detail/tabid/55/Default.aspx?ArticleId=38700