Evaluation of Ultra-thin Whitetopping PDF Download

Author: Dave Amos
Publisher:
ISBN:
Category : Fiber-reinforced concrete
Languages : en
Pages : 24

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Author: Jamshid M. Armaghani
Publisher:
ISBN:
Category : Fiber-reinforced concrete
Languages : en
Pages : 30

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Book Description

Author: Haifang Wen
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 136

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Author: Mang Tia
Publisher:
ISBN:
Category : Pavements, Asphalt
Languages : en
Pages : 108

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Book Description

Author: Robert Otto Rasmussen
Publisher: Transportation Research Board
ISBN: 0309070198
Category : Pavements
Languages : en
Pages : 96

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Book Description
TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 338: Thin and Ultra-Thin Whitetopping summarizes available information to document how state departments of transportation and others are currently using thin and ultra-thin whitetopping overlays among various pavement rehabilitation alternatives. The report covers all stages of the proper application of whitetopping overlays, including project selection, design, materials selection, construction, maintenance, and eventual rehabilitation or replacement.

Author:
Publisher:
ISBN:
Category : Pavements, Asphalt
Languages : en
Pages : 108

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Author: James K. Cable
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 42

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Book Description
Many cities in Iowa have retained the original brick street surfaces in downtown areas and in older residential areas as the base for modern driving surfaces. The original brick surfaces were not built to handle current and future traffic loadings. In recent years, these surfaces have tended to shift and become uneven, creating problems with safety. Asphaltic concrete overlays have been the typical rehabilitation technique in these situations. This has proven to be successful rehabilitation technique in some cases; in other cases, the combination of movement of the brick and flexibility of the asphalt has proven to accentuate the original problems. Most of the existing literature on rehabilitation of brick streets shows the use of asphaltic concrete. Other rehabilitation methods include reconstruction of the brick surface and strengthening of the surface by placing asphaltic concrete or portland cement concrete, along with sand, underneath the brick layers. To date, little if anything has been done in the area of using portland cement concrete as an overlay of the brick surfaces. This final report documents the planning, construction, and performance of unbonded ultrathin whitetopping rehabilitation of a brick street in Oskaloosa, Iowa, in 2001. It also reports on a similar project in Des Moines that was constructed two years later in 2003.

Author: Scott Newbolds
Publisher: Purdue University Press
ISBN: 9781622600946
Category : Transportation
Languages : en
Pages : 466

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Book Description
Ultra-Thin Whitetopping (UTW) is a pavement rehabilitation technique that involves the placement of a thin Portland Cement Concrete (PCC) overlay, 2 inches (50 mm) to 4 inches (100 mm) thick, over a distressed Hot Mix Asphalt (HMA) pavement. Typically, the HMA pavement is milled and cleaned which helps to create a bond between the existing HMA pavement and the PCC overlay. The bond between the two layers promotes composite action of the pavement section and as a result has a direct impact on the performance of the UTW Pavement. This composite action allows for the reduced thickness in the UTW layer. Additionally, a short joint spacing is typically used, which reduces the UTW flexural and curling stresses. In this study three different test areas were constructed in the INDOT/Purdue University Accelerated Pavement Testing facility. Each test area had different lanes that varied by concrete mix design, bonding preparation, and pavement crosssection. These sections were subjected to 300,000 to 560,000 load applications. An additional test area was constructed outside the facility to evaluate pavement thicknesses and environmental effects. The project resulted in a modified UTW design methodology that takes into account the stiffness of all underlying pavement layers. Additionally, the project provides insight into the effects of pavement section, UTW mix design, mechanical loading, bond conditions, and environmental loading on the performance of UTW.

Author:
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 490

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Author:
Publisher:
ISBN: 9781551871394
Category :
Languages : en
Pages :

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This paper was presented at the session titled 'Innovative pavement design and evaluation techniques'. Ultra-Thin Whitetopping (UTW) is a relatively new pavement rehabilitation strategy addressing the rutting and washboarding problems of existing asphalt pavements, in particular at intersections. The first Canadian UTW project was constructed in August of 1995, in Mississauga at the intersection of Britannia and Dixie Roads. This intersection is located in an industrial area on the west side of the Lester B. Pearson International Airport. One leg of this intersection had severely rutted after 8 years of heavy truck traffic. Approximately 100mm of asphalt was removed and replaced with the same thickness of concrete. The intersection is in good condition today without any major distress and little or no maintenance. Since then, four more UTW projects have been constructed in the City of Brampton along a busy thoroughfare, Queen Street East, to address the rutting problem caused by both heavy commercial and transit traffic. These pavements continue to perform today requiring no maintenance. The UTW also restores the required skid resistance to the roadways for safety. This paper deals with the design criteria, construction issues, subsequent monitoring and maintenance experiences. In addition, th ebonding of concrete and asphalt will be discussed based on testing data. For the covering abstract of this conference see ITRD number E200883.