Construction Inspection Techniques for Base Course Construction
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1986-05-01
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Edition:Reprint March 1989
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Abstract:AASHTO, M146, Terms Relating to Subgrade, Soil-Aggregate, and Field Materials defines "Base" as "the layer used in a pavement system to reinforce and protect the subgrade or subbase." It, therefore, is the layer of material which lies immediately below the wearing surface. This definition applies whether the wearing surface is bituminous or concrete. Because the base course lies close under the pavement surface, it is subject to severe loading. It follows that the materials in a base course must be of high quality and subjected to quality specifications and careful construction.
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