The construction of a pyrament bridge deck overlay (FHWA-OK-91-04)

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dc.contributor.sponsorOklahoma Department of Transportation. Materials and Research Division. Office of Research & Implementation
dc.creatorStreb, David C.
dc.date.accessioned2018-10-15T15:24:16Z
dc.date.available2018-10-15T15:24:16Z
dc.date.issued1991-5
dc.description.abstractThe Oklahoma Department of Transportation (ODOT) has been using .High Density Portland Cement (HDPC) overlays on reconstruction of bridge decks smce 1977. At the time of introduction, the HDPC (Iov;a method) was considered the best method to prevent or minimize bridge deck deterioration. Although many of the overlays have performed well, some have experienced severe cracking and delamination within ten years of service. Pyrament was chosen to be evaluated on a two inch bridge deck overlay as part of a bridge deck rehabilitation project. The performance of the overlay will be compared to the presently used HDPC overlays. Pyrament is a rapid setting, low permeability, high strength concrete developed by Lonestar Industries. Pyrament cement is a blend of 65~10 Portland cement, 30% fly ash, and 5% trademark additive. The 4-hour and 28-day compressive strengths were 2700 psi and 9600 psi respectively, Proper curirrg of Pyramcnt was found to be critical. Phase I of the project developed severe shrinkage cracking. Five percent of the Phase I overlay had to be replaced due to shrinkage cracking accompanied by dclaminations. The curing procedures in Phase I I were changed to resin curing compound, fogging, wet burlap, cotton blankets, and plastic all kept in place for 24 hours. The Phase 11 overlay shows no signs of cracking. The overlay will be tested annually and a performance report will be written in 1993.
dc.description.peerreviewNo
dc.description.versionConstruction Report November 1989-March 1991
dc.format.extent21 pages
dc.format.extent7,713,491 bytes
dc.format.mediumapplication.pdf
dc.identifier.govdocFHWA-OK-91-04
dc.identifier.otherOklahoma Department of Transportation State Planning and Research item number
dc.identifier.urihttps://hdl.handle.net/11244/301826
dc.languageen_US
dc.relation.ispartofseriesNo
dc.relation.requiresAdobe Acrobat Reader
dc.subject.keywordsPavement
dc.subject.keywordsConcrete Overlay
dc.subject.keywordsHigh Strength Concrete
dc.subject.keywordsBridge Deck
dc.titleThe construction of a pyrament bridge deck overlay (FHWA-OK-91-04)
dc.typeTechnical Report
dc.type.materialtext

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