Evaluation of the installation and initial condition of high performance concrete overlays placed on Route 60 over Lynnhaven Inlet in Virginia.
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1999-04-01
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Edition:Interim, 1/96-3/99
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Abstract:Sixteen high performance concrete overlays were placed on two 28-span bridges on Rte. 60 over Lynnhaven Inlet, Virginia Beach, ; Virginia, in the spring of 1996. The construction was funded with 20 percent Virginia Department of Transportation maintenance ; funds and 80 percent special ISTEA Section 6005 federal funds specifically allocated to demonstrate overlay technologies. ISTEA ; funds were also used to evaluate the installation and initial condition of the overlays and to prepare this report. ; The installation included 13 different concrete mixtures, an overlay with a thickness of only 19 mm (0.75 in), and spans with and ; without topical treatments of two corrosion inhibitors, for a total of 16 different overlays. The overlay types are 7% silica fume (SF), ; 5% SF and 35% slag (S), 5% SF and 15% class F fly ash (FA), 15% latex-modified concrete (LMC), 13% SF and 15% FA, 13% SF ; and 15% FA placed 19 mm thick, 7% SF and Rheocrete corrosion inhibiting admixture (CIA) (RCI), 7% SF and Armatec CIA (ACI) ; and ACI topical treatment (A), 7% SF and ACI, 7% SF and Darex CIA (DCI) and Postrite (P) topical treatment, 7% SF and DCI, ; 40% S, 7% SF and shrinkage reducing admixture (CQI), 7% SF and polyolefin fibers (POF), 7% SF and steel fibers (STF), and 7% ; SF and polypropylene fibers (PPF). With the exception of system F, overlays were required to have a minimum thickness of 32 mm. ; Also, system E had a variable thickness that ranged from 32 mm to 19 mm to provide good ride quality.
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Main Document Checksum:urn:sha256:e65da82b398fd00a8fea24fd0e784d9594095f33a3a27d2e741b9d93d4b6d154