Overview of Permeable Basesby Robert H. Baumgardner, Federal Highway Administration, Pavement Div, Washington, United States,
Abstract: Drainable pavement systems consist of: permeable base, separator lyer, and edgegrain system. This paper focuses on permable bases. A permeable base must provide both permeability and stability. Aggregate materials for permeable bases must be carefully selected to provide both permeability and stability. Permeable bases can be constructed using both unstabilized and stabilized bases. Both asphalt and cement stabilized bases have been successfully constructed when the proper application rates and construction practices are used. A minimum coefficient of permeability of 1000 feet per day is recommended for adequate drainage. Prper compaction is essential to seat the permeable base.
Subject Headings: Permeability (material) | Concrete pavements | Pavement condition | Drainage systems | Highway engineering | Aggregates | Base course
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