Concrete Overlays Challenge Asphaltby E. J. Renier, (M.ASCE), Consulting Engr.; Eden Prairie, MN,
Serial Information: Civil Engineering—ASCE, 1987, Vol. 57, Issue 4, Pg. 54-57
Document Type: Feature article
When a pavement needs more than minor repair but not total replacement, bonded and unbonded concrete overlays and inlays are options to consider. The article describes four projects where bonded overlays were applied—the pioneer 1979 job on I-80 near Avoca, Iowa, a second on I-80 at California's mountainous Donner Pass, which application failed but from which lessons have been learned that are included in a new FHWA report on these overlays a third on Houston's I-610 which at about 24 lane-miles is the biggest such job to date, and a fourth last summer on U.S. 71 near Storm Lake, Iowa. The last was notable because segments of pavement were kept out of service only 24 hours before traffic drove on the new overlay. This is far faster than for most concrete overlays. How this speedy curing was achieved is described. Finally, the article briefly describes the full-depth unbonded concrete inlay, essentially a complete new pavement placed in a groove created by milling out old, deteriorated pavement.
Subject Headings: Pavement overlays | Concrete pavements | Asphalt concrete | Concrete | Bonding | Highways and roads | Pavement condition | Rehabilitation | Mountains | Iowa
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