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Author: R. S. McDaniel
Publisher:
ISBN:
Category : Pavements, Asphalt
Languages : en
Pages : 31
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Book Description
This report summarizes the construction and early performance of a field trial of a Porous Friction Course (PFC) in Indiana. The PFC is compared to an adjacent section of Stone Matrix Asphalt (SMA) constructed at the same time using the same binder, coarse aggregate and fiber. Those mixes are also compared to a similar conventional Hot Mix Asphalt (HMA) surface constructed one to two months earlier. This evaluation shows that the PFC produces significantly lower noise levels than the HMA and SMA as measured by both the pass-by and close-proximity methods. The SMA produces higher noise levels than the HMA. The PFC also had the highest surface texture, as measured by the Circular Texture Meter; the HMA had the lowest texture. Data from the Circular Texture Meter and Dynamic Friction Tester were combined to determine the International Friction Index (FN60). The PFC provided the highest friction value, followed by the SMA. Both the PFC and SMA had substantially higher friction values than the HMA even though they were tested before opening the road to traffic. The friction values for the PFC and SMA are expected to increase after traffic wears away the binder film coating the protruding aggregate particles. The PFC also reduced splash and spray and improved visibility during rain events, as observed qualitatively. Long term performance of the PFC should be monitored to determine how long these benefits last, but initially the PFC appears to offer an efficient and economical way to reduce noise and maintain or even improve friction and visibility.
Author: R. S. McDaniel
Publisher:
ISBN:
Category : Pavements, Asphalt
Languages : en
Pages : 31
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Book Description
This report summarizes the construction and early performance of a field trial of a Porous Friction Course (PFC) in Indiana. The PFC is compared to an adjacent section of Stone Matrix Asphalt (SMA) constructed at the same time using the same binder, coarse aggregate and fiber. Those mixes are also compared to a similar conventional Hot Mix Asphalt (HMA) surface constructed one to two months earlier. This evaluation shows that the PFC produces significantly lower noise levels than the HMA and SMA as measured by both the pass-by and close-proximity methods. The SMA produces higher noise levels than the HMA. The PFC also had the highest surface texture, as measured by the Circular Texture Meter; the HMA had the lowest texture. Data from the Circular Texture Meter and Dynamic Friction Tester were combined to determine the International Friction Index (FN60). The PFC provided the highest friction value, followed by the SMA. Both the PFC and SMA had substantially higher friction values than the HMA even though they were tested before opening the road to traffic. The friction values for the PFC and SMA are expected to increase after traffic wears away the binder film coating the protruding aggregate particles. The PFC also reduced splash and spray and improved visibility during rain events, as observed qualitatively. Long term performance of the PFC should be monitored to determine how long these benefits last, but initially the PFC appears to offer an efficient and economical way to reduce noise and maintain or even improve friction and visibility.
Author: Nur Ainaa Saadon
Publisher:
ISBN:
Category :
Languages : en
Pages : 71
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Book Description
Author: Krey Younger
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 96
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Book Description
Author: Chen Fei
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 6
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Book Description
With their quick drainage, enhanced skid-resistance under wet conditions, noise-reducing effect, and lessened splashing and spraying, porous asphalt pavements are now receiving more and more attention. Since research and application of porous asphalt pavements has just started in China at present, there are no corresponding design and construction specifications. Therefore, it is essential to verify the design through actual field performance monitoring on such pavement as those of the Yan-Tong Expressway. This highway is ideal for such an investigation since it includes a section of porous asphalt surface together with stone mastic asphalt and another type of dense graded surface in the same section. The major parameters of the assessment consist of permeability and skid-resistance that are essential to porous asphalt pavements and rutting depth under heavy traffic. We use a simulation model to predict the rutting depth in the short term. The results show that porous asphalt pavement performs well under the heavy truck traffic volume on the Yan-Tong Expressway.
Author: Krey Younger
Publisher:
ISBN:
Category : Pavements, Asphalt
Languages : en
Pages : 134
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Book Description
Author: Robert A. Eaton
Publisher:
ISBN:
Category :
Languages : en
Pages : 49
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Book Description
This report presents the results of repeated load tests upon various porous pavement test sections constructed in an overflow parking lot at Walden Pond State Reservation in Concord, Massachusetts. From the fall of 1977 to the spring of 1979, the seasonal structural responses of the sections were monitored with a repeated plate bearing apparatus. After the first set of fall and spring tests, some sections were reconstructed because the asphalt concrete pavement was not porous enough. Test points were added or replaced to accommodate the reconstructed sections. Results show that the dense asphalt concrete distributed the load over a greater area than the porous asphalt concrete, thicker pavements were stronger for both dense and porous asphalt concrete, and the deflection basin depth and diameter changed proportionately to applied loads. (Author).
Author: Ulf Sandberg
Publisher:
ISBN: 9789163126109
Category : Automobiles
Languages : en
Pages : 616
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Book Description
Author: Rohana Hassan
Publisher: Springer
ISBN: 9812872906
Category : Technology & Engineering
Languages : en
Pages : 1251
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Book Description
The special focus of this proceedings is to cover the areas of infrastructure engineering and sustainability management. The state-of-the art information in infrastructure and sustainable issues in engineering covers earthquake, bioremediation, synergistic management, timber engineering, flood management and intelligent transport systems. It provides precise information with regards to innovative research development in construction materials and structures in addition to a compilation of interdisciplinary finding combining nano-materials and engineering.
Author: T. Beatty
Publisher:
ISBN:
Category : Pavements, Asphalt concrete
Languages : en
Pages : 16
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Book Description
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.
