A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Thin and Ultra-Thin Whitetopping. A Synthesis of Highway Practice
The purpose of this synthesis is to summarize available information and to document how departments of transportation and other agencies and owners are currently using thin whitetopping (TWT) and ultra-thin whitetopping (UTW) overlays among their various pavement rehabilitation alternatives. Although TWT and UTW overlays have been constructed for decades, their recent popularity is largely the result of a renewed demand for longer-lasting but cost-effective solutions for hot-mix asphalt (HMA) pavement rehabilitation. A whitetopping overlay is constructed when a new portland cement concrete layer is placed on top of an existing HMA pavement system. The concrete thickness for a UTW is equal to or less than 100 mm (4 in.). A TWT is greater than 100 mm (4 in.) but less than 200 mm (8 in.). Conventional whitetopping is an overlay of 200 mm (8 in.) or more. In most cases, a bond between the new concrete and existing HMA layers is not only assumed during design, but specific measures are taken to ensure such a bond during construction. The success of this bond, leading to composite action, has been found to be critical to the successful performance of this pavement-resurfacing alternative.
Thin and Ultra-Thin Whitetopping. A Synthesis of Highway Practice
The purpose of this synthesis is to summarize available information and to document how departments of transportation and other agencies and owners are currently using thin whitetopping (TWT) and ultra-thin whitetopping (UTW) overlays among their various pavement rehabilitation alternatives. Although TWT and UTW overlays have been constructed for decades, their recent popularity is largely the result of a renewed demand for longer-lasting but cost-effective solutions for hot-mix asphalt (HMA) pavement rehabilitation. A whitetopping overlay is constructed when a new portland cement concrete layer is placed on top of an existing HMA pavement system. The concrete thickness for a UTW is equal to or less than 100 mm (4 in.). A TWT is greater than 100 mm (4 in.) but less than 200 mm (8 in.). Conventional whitetopping is an overlay of 200 mm (8 in.) or more. In most cases, a bond between the new concrete and existing HMA layers is not only assumed during design, but specific measures are taken to ensure such a bond during construction. The success of this bond, leading to composite action, has been found to be critical to the successful performance of this pavement-resurfacing alternative.
Thin and Ultra-Thin Whitetopping. A Synthesis of Highway Practice
R. O. Rasmussen (author) / D. K. Rozycki (author)
2004
100 pages
Report
No indication
English
Construction Equipment, Materials, & Supplies , Highway Engineering , Pavement overlays , Fiber reinforced concrete , Highway construction , Coverings , Coldmilling , Pavement rehabilitation , Project selection , Design , Construction practices , Performance , Repairs , Research needs , Whitetopping
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