Parking Lot Gets White Top

by Dale Diulus, Regional Engr.; Portland Cement Assn., 8700 W. Helen Drive, Magna, UT 84044,


Serial Information: Civil Engineering—ASCE, 1986, Vol. 56, Issue 6, Pg. 65-67


Document Type: Feature article

Abstract:

The many-acre parking lot at the Valley Fair Mall shopping center in Salt Lake City, Utah is described. In 1985 the asphalt pavement was overlaid with concrete, making it one of the relatively few parking lots to be whitetopped, and perhaps the largest. The author says any parking lot pavement, no matter how badly deteriorated, can be overlaid. Present design techniques have not advanced far enough to permit taking advantage of any pavement capacity left in the underlying asphalt; new design procedures that would do that are being field-tested. The pavement is 4 in. plain (unreinforced) concrete, with contraction joints every 10 ft, unsealed. Before it was placed, the most deteriorated pavement areas were dug out and repaid. Low areas were filled with granular material before placing the concrete. Whitetopping was chosen here because, though more costly to install, it was predicted to last considerably longer at a very adverse site (high water table, fine-grained soils, flat terrain), so the total annual cost was predicted to be lower.

Subject Headings: Parking facilities | Asphalt pavements | Pavement design | Soil water | Shopping centers | Pavement condition | Granular materials

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