0-6621 : developing a mixture-based specification for flexible base.
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2012-08-01
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Abstract:The Texas Department of Transportation
(TxDOT) currently utilizes Item 247, “Flexible
Base,” to specify a foundation course of flexible
base utilized in a pavement. Base materials are
not allowed to be used by the contractors until
the materials have been approved in the
stockpile, typically at the point of production or
at or near the construction site. This project
evaluated the current method of base material
acceptance, as required in Item 247, and
investigated methods to replace material
approval based on stockpile sampling and
testing with a mixture design methodology and
quality control procedure.
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