Structural Concrete Overlays in Bridge Deck Rehabilitation PDF Download
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Author: Frieder Seible
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 332
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Book Description
Of experimental results, analytical studies and design recommendations -- Experimental program.
Author: Frieder Seible
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 332
Get Book Here
Book Description
Of experimental results, analytical studies and design recommendations -- Experimental program.
Author: Frieder Seible
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 71
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Zachary B. Haber
Publisher:
ISBN:
Category : Concrete bridges
Languages : en
Pages : 48
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Book Description
Bridge decks are commonly rehabilitated using overlays depending on the cause of deck deterioration, available budget, and desired service life of the rehabilitated structure. One emerging solution for bridge deck rehabilitation is thin, bonded ultra-high performance concrete (UHPC) overlays. As an overlay material, UHPC can provide both structural strengthening and protection from ingress of contaminates using a 1-in (25 mm) to 2-in (51 mm) layer of material. The first U.S. deployment of UHPC as a bridge deck overlay was completed in May 2016 on a reinforced concrete slab bridge located in Brandon. A few months after installing the UHPC overlay, a field inspection of the bridge identified some locations along the deck where delamination may have occurred. To address this concern, a field study was conducted in November 2016 to evaluate the bond between the UHPC overlay and the substrate concrete bridge deck. Researchers from the Federal Highway Administration’s (FHWA) Turner-Fairbank Highway Research Center (TFHRC) synthesized photographic evidence, conducted a field inspection of the bridge deck surface using a chain drag, and conducted physical testing of the UHPC-concrete interface bond using the direct tension bond pull-off test. Tested samples were taken back to TFHRC and the UHPC-concrete interface subsequently analyzed using scanning electron microscopy (SEM). The pull-off test data indicated that the UHPC overlay and the existing concrete bridge deck was intact, which was confirmed by SEM analysis.
Author:
Publisher:
ISBN: 9780921303152
Category :
Languages : en
Pages : 12
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Book Description
Increased demands for higher legal loads and permit overloads on the nation's highway system necessitate the strengthening of a large number of existing short and medium span bridge structures. Frequently, the strengthening of bridge superstructures goes hand in hand with rehabilitation measures of the bridge deck and the road surface such as structural concrete overlays or widening measures to accommodate additional traffic lanes. As part of an ongoing research project with CalTrans, a 12 ft wide by 60 ft long section of an existing 25 year old cast-in-place concrete T-beam was brought to the Structural Systems Laboratory at the University of California, San Diego for full-scale investigation of different repair and strengthening measures. The repair and strengthening measures investigated were: 1) bridge deck rehabilitation by full depth structural concrete overlays; 2) repair of flexurally cracked bridge superstructures by epoxy injection; 3) strengthening by means of external post-tensioning tendons, and 4) addition of a thin high-strength prestressed bottom soffit panel to the bridge superstructure. Before and after the implementation of repair and strengthening measures, forced vibration tests as well as concentric and eccentric working load level tests were conducted in order to monitor the change in structural characteristics. A brief description of the implementation of each measure is provided together with experimental behavioural data and nonlinear analytical parameter studies. For the covering abstract of the Conference see IRRD Abstract no. 807839.
Author: K. Babaei
Publisher:
ISBN:
Category : Bridge deck
Languages : en
Pages : 14
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Book Description
This paper documents performance of twelve concrete bridge decks in Washington State that were rehabilitated and/or protected with latex-modified concrete and low-slump dense concrete overlays in order to prevent further deicing salt penetration and concrete deterioration caused by reinforcing steel corrosion. An evaluation is made of the factors that have affected the serviceability of those overlaid bridge decks, and recommendations are made based on that evaluation for the design and construction of concrete overlays in order to improve bridge deck performance and to extend bridge deck service life. The factors evaluated are overlay freeze-thaw scaling, surface wear and skid resistance, surface cracking, bond with the underlying deck, chloride and water intrusion, and finally the concrete overlay's ability to retard continued reinforcing steel corrosion and corresponding concrete deterioration.
Author: Teresa M. Adams
Publisher:
ISBN:
Category : Concrete bridges
Languages : en
Pages : 76
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Book Description
Author: Michael M. Sprinkel
Publisher: Strategic Highway Research Program (Shrp)
ISBN:
Category : Concrete bridges
Languages : en
Pages : 124
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Book Description
This report presents the rapid methods used by state highway agencies for the protection, repair and rehabilitation of bridge decks. The report is based on a review of the literature; the responses to questionnaires sent to state departments of transportation, Canadian provinces, selected turnpike and thruway authorities, technology transfer centers, and material suppliers; and the evaluation of 50 bridge decks located in seven states. Polymer overlays, sealers, high-early strength hydraulic cement concrete overlays, and patches are compared for their performance characteristics and service life.
Author: David W. Fowler
Publisher: Transportation Research Board
ISBN: 0309143543
Category : Technology & Engineering
Languages : en
Pages : 75
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Book Description
TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 423: Long-Term Performance of Polymer Concrete for Bridge Decks addresses a number of topics related to thin polymer overlays (TPOs). Those topics include previous research, specifications, and procedures on TPOs; performance of TPOs based on field applications; the primary factors that influence TPO performance; current construction guidelines for TPOs related to surface preparation, mixing and placement, consolidation, finishing, and curing; repair procedures; factors that influence the performance of overlays, including life-cycle cost, benefits and costs, bridge deck condition, service life extension, and performance; and successes and failures of TPOs, including reasons for both.
