Effects of Special Aggregate on Bridge Deck Overlay Frictional Properties, HR-205, 1986

(1986) Effects of Special Aggregate on Bridge Deck Overlay Frictional Properties, HR-205, 1986. Transportation, Department of

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Abstract

The Iowa DOT has been using the "Iowa Method" thin bonded low-slump dense Portland Cement Concrete (PCC) bridge deck overlay for rehabilitation of delaminated decks since 1963. In time, continued use of studded tires will wear away the transverse grooved texture. The objective of this research was to evaluate the benefit of incorporating a hard durable aggregate into a dense PCC overlay to provide frictional property longevity. The project included three overlays on I-35 near Ankeny. The texture and friction properties of two overlays, one constructed with crushed granite and the other with crushed quartzite coarse aggregate, were compared to an overlay constructed with locally available crushed limestone. There were no construction problems resulting from the use of crushed granite or quartzite. There was no significant frictional property benefit from the crushed granite or crushed quartzite through six years.

Item Type: Departmental Report
Keywords: Aggregates, Bridge decks, Concrete overlays, Delamination, Limestone aggregates, Portland cement concrete, Studded tires
Subjects: Transportation > Pavements
Transportation > Pavements > Concrete
Transportation
Transportation > Materials
Transportation > Materials > Gravel and aggregates
Transportation > Bridges and tunnels
Transportation > Roads and highways
Transportation > Maintenance and preservation
ID Code: 19642
Deposited By: Iowa DOT Library
Deposited On: 01 Jun 2015 16:18
Last Modified: 01 Jun 2015 16:18
URI: http://publications.iowa.gov/id/eprint/19642