Author: William P. Chamberlin
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 36
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Book Description
This report describes performance of a 1-in. thick open-friction-course (OFC) bituminous overlay on an existing concrete pavement, and an adjacent conventional 2 1/2-in. thick dense-graded bituminous overlay placed as a control. The pavements were evaluated after 7 years of service by analyzing core samples for aggregrate degradation, changes in mix density and voids content, and changes in asphalt hardness. Also, pavement surfaces were inspected periodically for cracking, raveling and debonding, texture, friction properties, and rutting. Results indicate that after 7 years the control pavement is in better physical condition than the OFC, but that the latter continues to provide better drainage of surface water and better friction. Of particular significance are the OFC's substantially more favorable smooth-tire friction and friction number-speed gradients.
Author: Kenneth S. Dodge
Publisher:
ISBN:
Category : Pavements, Concrete
Languages : en
Pages : 25
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Book Description
This report documents the first 4 years of performance of a 1-in. thick open-friction-course (OFC) and its adjacent conventional dense-graded top course (control), placed directly over a portland cement concrete pavement. The control section was placed on the eastbound lanes of Rte 17 in the Town of Kirkwood, Broome County, during the fall of 1975, and the OFC section in the adjacent westbound lanes during June of the following year. The pavements were evaluated by analyzing changes in properties of the in-place mixes and by tracking changes in condition of the surfaces. The physical properties of the mixes were examined in extracted pavement cores, including aggregate gradation, binder penetrations and viscosities, and mix void content. Pavement surfaces were monitored for frictional performance, micro- and macro-texture, rut depth, rideability, and cracking. Results indicate that the control mix provides better performance as a composite material, but the OFC exhibits better surface performance with the exception of joint cracking severity and rideability.
Author: Frazier Parker
Publisher:
ISBN:
Category : Cement
Languages : en
Pages : 88
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Author: Peter Harry Range
Publisher:
ISBN:
Category :
Languages : en
Pages : 506
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The research findings presented is this thesis are one portion of a four-part report on the prediction of coarse aggregate performance in hot-mixed asphalt, portland cement concrete, base course, and open-graded friction course by micro-Deval and other aggregate tests. This thesis contains discussions of the results and correlations for portland cement concrete and open-graded friction course as well as a several rock type subgroups of hot-mixed asphalt. The research involved 117 different coarse aggregate sources and performance data gathered from 35 transportation agencies. Each source was subjected to thirteen aggregate tests including micro-Deval. The results for each test alone and in combination with other tests were analyzed for correlations with field performance.
Author: Gerald Huber
Publisher: Transportation Research Board
ISBN: 9780309068635
Category : Technology & Engineering
Languages : en
Pages : 124
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Book Description
This synthesis will be of interest to pavement construction, maintenance, design, and materials engineers; pavement contractors; and others interested in the use of open-graded friction course (OGFC) mixes. It describes the current state of the practice on the use of OGFC mixes, including information regarding design, materials, construction, maintenance, and rehabilitation strategies. Alternative treatments to traditional OGFC are also identified and discussed. Information was collected by surveying U.S. and Canadian transportation agencies and by conducting a literature search to gather additional insight into North American and European practices. This TRB report describes the recent performance of North American OGFC mixes and European porous asphalt by identifying benefits and stress indicators. A new generation of OGFC mixes has evolved over the last 5 years with changes that have been reported to dramatically improve performance. This synthesis describes new materials and design methods being used, as well as the applicability of the new generation of open-graded mixtures to North American use.
Author:
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 88
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Author: Harry A. Smith
Publisher: Transportation Research Board
ISBN: 9780309053068
Category : Technology & Engineering
Languages : en
Pages : 60
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Book Description
This synthesis will be of interest to construction, maintenance, pavement design, and materials engineers, pavement contractors, and others interested in the use of open-graded friction courses (OGFC) as an asphalt concrete pavement wearing surface. Information is provided on performance benefits and limitations of OGFC, material and mixture properties, and current construction practices in use in the United States and Europe. Advances in mixture design and construction techniques have overcome several of the performance limitations identified in early applications of OGFC, as well as enhanced the performance benefits associated with OGFC use. This report of the Transportation Research Board describes the current state of the practice with respect to the use of OGFC. Experience with the design, construction, and performance of OGFC is summarized, based on a review of the literature, documentation of experience from applications in the U.S. and Europe, and site visits to several states.
Author: United States. Federal Highway Administration. Office of Highway Operations
Publisher:
ISBN:
Category : Road construction
Languages : en
Pages : 500
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Author: S. H. Dahir
Publisher: Transportation Research Board
ISBN: 9780309049047
Category : Technology & Engineering
Languages : en
Pages : 68
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Book Description
This synthesis will be of interest to pavement engineers, safety officers, and others interested in wet-pavement safety programs. Information is provided on the programs used by a number of agencies in gathering data and correcting areas of potential wet-weather accidents. Wet-pavement accidents continue to be of concern to highway agencies. This report of the Transportation Research Board summarizes agencies' programs in areas such as accident reporting, vehicle testing, friction testing, corrective actions for problem areas, and tort liability and gives some general guidelines for the content of a wet-pavement safety program.
Author: James A. Crovetti
Publisher:
ISBN:
Category : Pavements, Concrete
Languages : en
Pages : 100
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