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Author: Habib Tabatabai
Publisher:
ISBN:
Category : Concrete bridges
Languages : en
Pages : 100
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Author: Habib Tabatabai
Publisher:
ISBN:
Category : Concrete bridges
Languages : en
Pages : 100
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Book Description
Author: Steven M. Soltesz
Publisher:
ISBN:
Category : Asphalt concrete
Languages : en
Pages : 80
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Book Description
Eight thin polymer overlay systems were evaluated in the laboratory and on two bridge decks exposed to trucks and passenger vehicles including those with studded tires. The products were Mark 154, Flex-O-Lith, Safetrack HW, Kwik Bond PPC MLS, Tyregrip, SafeLane HDX, Urefast PF60, and Unitex ProPoxyType III DOT. None of the overlay systems showed superior performance under moderate average daily traffic from the standpoint of maintaining good skid resistance and resisting wear through. Tyregrip and Safetrack HW started to wear through to the concrete after exposure of approximately 1.3 million vehicles, and Urefast PF60 wore through much sooner. For the five products that did not wear through, empirical equations predicted the friction number of the best of these five products would decrease to 40 (equivalent to the friction number of the concrete) within five months at a traffic level of 10,000 vehicles per lane per day. Delamination from the concrete was not a major problem with the products. Laboratory tests were not able to predict performance.
Author: Brian A. Pfeifer
Publisher:
ISBN:
Category : Concrete bridges
Languages : en
Pages : 60
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Author: DeWayne L. Wilson
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages :
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Book Description
This report summarizes the Washington State Department of Transportation's (WSDOT's) 10 years of experience with "epoxy" and "methyl methacrylate" (MMA) thin polymer bridge deck overlays. WSDOT uses a modified concrete as its primary type of bridge deck overlay, but in some cases a bridge's physical characteristics, such as lightweight design or narrow roadway width, will not allow using a modified concrete overlay. Thin polymer overlays provide an alternative. Thin polymer overlays offer more rapid construction, curing in 4 to 8 hours compared to 42 hours for a modified concrete overlay. Thin polymer overlays are lightweight (due to their 3/8 in. thickness, approximately 5 lb/SF versus 19 lb/SF for a modified concrete overlay and are generally less labor intensive and require less specialized equipment than a modified concrete overlay.
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.
Author: Masood Rasoulian
Publisher:
ISBN:
Category : Concrete bridges
Languages : en
Pages : 55
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Book Description
Four overlay systems were applied to concrete bridge decks in north Louisiana in May 1985 to evaluate their performance as friction surfaces primarily and also as concrete sealers. Dural Flexolith, Poly-Carb Flexogrid, and Con/Chem Cono/Crete were placed on three separate bridge decks; sand and Dural epoxy were placed on the fourth deck. Friction numbers were measured with the British Portable Tester and the E-274 Skid Trailer. The sealing characteristics of each system were checked with electrical resistivity measurements.
Author:
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 2
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Author: Masood Rasoulian
Publisher:
ISBN:
Category : Concrete bridges
Languages : en
Pages : 52
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Book Description
Author: Dave R. Johnson
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 89
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Book Description
This study, part of a larger national effort to research thin bonded overlays for bridge decks, investigated the relative performance and costs of various technologies used for thin overlays on concrete bridge decks. This element of the program considered four different overlay treatments applied to a total of 13 bridges along Interstate 90 in southwestern Montana. The overlay technologies considered consisted of two Portland cement related products, an acrylic polymer modified, cement-based topping (Thorotop HCR) and silica fume concrete; and two resin/aggregate systems, one with an epoxy binder (Flexolith 216) and one with a methyl methacrylate (MMA) binder (Degadur 330BD). Extensive documentation was collected on the pre-overlay condition of the decks, the overlay installation processes, the initial condition of the overlays, and the condition of the overlays after one or two winter(s) of service.
Author: Timothy L. Ramirez
Publisher:
ISBN:
Category : Concrete bridges
Languages : en
Pages : 134
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Book Description
