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Evaluation of an asphalt-treated drainage blanket in a rigid pavement section : final report.
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1978-01-01
[PDF-1.85 MB]
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Abstract:This study was undertaken to develop a permeable yet stable, asphalt-treated, layered shoulder drainage system for a typical pavement section. Stability and permeability characteristics of several mixes were evaluated in the laboratory. Two installations were constructed in North Louisiana on Interstate 20 using the design criteria established by the laboratory findings.
Field evaluations consisted of Dynaflect testing for stability, permeability tests, and a visual evaluation of excavated sections of the drainage blanket. Faulting measurements were taken on the pavement joints adjacent to drainage blanket No. 2 and on the corresponding joints on the opposite-bound pavement to determine pavement-related performance of the drainage blanket.
A permeable and stable asphalt-treated shoulder drainage system was constructed as determined by performance criterion. Faulting measurements showed that improved pavement performance could be directly related to the installation of the drainage system.
The favorable results of this study provided the stimulus for further investigations in the filed of surface water drainage. A full-roadway-width drainage blanket and a perforated pipe underdrain system were both examined on an experimental basis. The relevancy of these systems to the subject of this report dictate their inclusion in the form of appendices.
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