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Statistical Analysis Of Performance Of Recycled Hot Mix Asphalt Overlays In Flexible Pavement Rehabilitation
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Book Synopsis Statistical Analysis of Performance of Recycled Hot Mix Asphalt Overlays in Flexible Pavement Rehabilitation by : Turner-Fairbank Highway Research Center
Download or read book Statistical Analysis of Performance of Recycled Hot Mix Asphalt Overlays in Flexible Pavement Rehabilitation written by Turner-Fairbank Highway Research Center and published by . This book was released on 2011 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Long-term Performance of Cold In-place Recycled Asphalt Roads by : Dong Chen
Download or read book Evaluation of Long-term Performance of Cold In-place Recycled Asphalt Roads written by Dong Chen and published by . This book was released on 2006 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: Asphalt pavements deteriorate over time. Typically three to five years following construction, reflected cracks, one of the primary forms of distress in hot-mix asphalt overlays of flexible pavements, may be observed. When rolled down, reflected cracks affect ride quality. In addition, reflected cracks allow the penetration of water into the pavement and the base. The water causes the asphalt mix to deteriorate and the base to soften. Consequently the service life of pavements is reduced. Cold In-Place Recycling (CIR) provides an economical rehabilitation method that mitigates crack reflection by pulverizing the asphalt pavement surface, thus destroying the old crack pattern in the recycled layer. However, recycled roads have inconsistent performance. Several years after recycling, some roads are still in excellent condition with only a few minor cracks while extensive cracking and rutting were observed on other roads. These opposite behaviors can be observed on roads that were constructed in the same county, by the same contractor in the same construction season. Thus the difference in performance is probably not from such factors as weather, equipment, contractors' experiences, and construction procedures. Rather, other factors become more prominent in affecting pavement performance, such as: age of the recycled pavement; traffic volume; support conditions; and aged engineering properties of the CIR materials. This dissertation investigates how aged engineering properties of the CIR materials and other factors affect pavement performance. Twenty-four sample roads were selected to represent various ages, traffic volumes, and support conditions in a geographically balanced sampling in Iowa. Pavement Condition Index (PCI) ratings were collected using an automated pavement distress digital image collection and analysis system. Engineering properties of CIR materials were examined through field and lab tests. Statistical analyses were conducted to descript the relationships between the pavement performance and the prominent factors. The conclusions and recommendations were presented in this dissertation.
Download or read book Focus written by and published by . This book was released on 2008 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comprehensive Performance Evaluation of In-place Recycled Hot Mix Asphalt as Unbound Granular Material by :
Download or read book Comprehensive Performance Evaluation of In-place Recycled Hot Mix Asphalt as Unbound Granular Material written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A promising pavement rehabilitation strategy that is of interest to state highway agencies and local governments involves the in-place pulverization of failed hot mix asphalt (HMA) pavements and re-use of the pulverized material as a granular base material. Advantages of this technique include a reduction in the use of virgin aggregate, a reduction in the amount of construction traffic, and removal of the potential for reflective cracking from the existing cracked pavement layers through the new HMA surface. However, the performance of this technique has not been comprehensively evaluated, and, in particular, permanent deformation characteristics. In this thesis, four pilot projects in northeastern California were used to evaluate the pulverized material and this rehabilitation strategy. The characteristics and performance of the pulverized material were evaluated by comprehensive laboratory and field testing, and analyses. Based on the multistage repeated load triaxial test results, the shakedown limits of the pulverized material were estimated and compared with the stress states calculated from the cross-anisotropic finite element analyses based on real traffic and climate data. A recursive-incremental damage model was used to predict permanent deformation of the pulverized base layer over the long term and to compare it with that of typical aggregate base material. Based on the comprehensive laboratory testing, field testing, and analyses, the pulverized material was found to be generally stiffer than typical aggregate base material, possibly due to better aggregate shape than that found in typical aggregate base material. The pulverized mateiral has less permanent deformation resistance at low stress levels but greater resistance at higher stress levels than typical granular material used in California. Possible reasons for the lower permanent deformation resistance at low stress levels might be the laboratory compaction method and that the recycled HMA in the pulverized material undergoes additional breakdown under initial loading since coarse fractions of the pulverized materials are greater than that of the comparison virgin aggregate base. Overall, the performance benefits of this rehabilitation strategy make it a viable option for flexible pavement rehabilitation.
Download or read book Public Roads written by and published by . This book was released on 2011 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Road and Airfield Pavement Technology by : H. R. Pasindu
Download or read book Road and Airfield Pavement Technology written by H. R. Pasindu and published by Springer Nature. This book was released on 2022-03-03 with total page 917 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume gathers the latest advances, innovations, and applications in the field of pavement technology, presented at the 12th International Conference in Road and Airfield Pavement Technology (ICPT), hosted by the University of Moratuwa, Sri Lanka, and held on July 14-16, 2021. It covers topics such as pavement design, evaluation and construction, pavement materials characterization, sustainability in pavement engineering, pavement maintenance and rehabilitation techniques, pavement management systems and financing, transportation safety, law and enforcement related to pavement engineering, pavement drainage and erosion control, GIS applications, quarry material assessment, pavement instrumentation, IT and AI applications in pavement. Featuring peer-reviewed contributions by leading international researchers and engineers, the book is a timely and highly relevant resource for materials scientists and engineers interested in pavement engineering.
Book Synopsis Effectiveness of Thin Hot Mix Asphalt Overlay on Pavement Ride and Condition Performance by : Eddie Chou
Download or read book Effectiveness of Thin Hot Mix Asphalt Overlay on Pavement Ride and Condition Performance written by Eddie Chou and published by . This book was released on 2008 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objectives of this study were: 1) To determine the cost effectiveness of thin hot mix asphalt (HMA) overlays as a maintenance technique; 2) To determine under what conditions a thin overlay would be suitable; 3) To determine the timing of constructing a thin overlay to maximize its benefits; and 4) To develop a prototype aggregate source information system to correlate aggregate source quality to pavement performance. Performance data for thin overlays constructed by ODOT since 1990 were collected to study the cost-effectiveness of thin overlay. The average thin overlay project cost is about 40% of the average minor rehabilitation project cost for the Priority System, and approximately 60% for the General System pavements. In contrast, the average service life of a thin overlay is generally more than 70% of that of a minor rehabilitation. Therefore, most of the thin overlays are deemed cost effective. Thin overlay projects that are not cost effective tend to be those performed on very poor pavements, and with insufficient thickness. Thin overlays are most likely to be cost effective if the existing pavement's PCR score is between 70 and 90 for Priority System, and between 65 and 80 for General System pavements. A prototype aggregate source GIS system was developed. Higher aggregate soundness loss is shown to correlate with higher pavement deterioration rate. A thin HMA overlay is generally a cost-effective maintenance treatment. Employed properly, thin overlay provides a relatively low cost alternative in preserving and extending the service life of the existing pavement.
Book Synopsis Improved Mix Design, Evaluation, and Materials Management Practices for Hot Mix Asphalt with High Reclaimed Asphalt Pavement Content by : Randy Clark West
Download or read book Improved Mix Design, Evaluation, and Materials Management Practices for Hot Mix Asphalt with High Reclaimed Asphalt Pavement Content written by Randy Clark West and published by Transportation Research Board. This book was released on 2013 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's National Cooperative Highway Research Program (NCHRP) Report 752: Improved Mix Design, Evaluation, and Materials Management Practices for Hot Mix Asphalt with High Reclaimed Asphalt Pavement Content describes proposed revisions to the American Association of State Highway and Transportation Officials (AASHTO) R 35, Superpave Volumetric Design for Hot Mix Asphalt, and AASHTO M 323, Superpave Volumetric Mix Design, to accommodate the design of asphalt mixtures with high reclaimed asphalt pavement contents.
Book Synopsis Developing Best Practices for Rehabilitation of Concrete with Hot Mix Asphalt (HMA) Overlays Related to Density and Reflective Cracking by : Eshan V. Dave
Download or read book Developing Best Practices for Rehabilitation of Concrete with Hot Mix Asphalt (HMA) Overlays Related to Density and Reflective Cracking written by Eshan V. Dave and published by . This book was released on 2021 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Asphalt overlays are commonly used to rehabilitate deteriorated Portland cement concrete (PCC) pavements. However, mechanically or thermally driven movements at joints and cracks in the underlying pavement usually lead to development of reflective cracks in the overlay. The formation and propagation of reflection cracking is controlled by the mechanical properties of the asphalt and the condition of the overlaid pavement. Current state of practice for asphalt overlay design is policy oriented and lacking an engineered design approach. There is need for establishing state of practice in design of overlays as well as for assessment of PCC pavement condition and recommending improvements to existing pavement prior to overlay construction. The objective of this study is to develop a simple decision tree-based tool for selecting suitable asphalt mixtures and overlay designs to prolong overlay lives by lowering reflective cracking and improving in-situ density. This research will leverage the current National Road Research Alliance (NRRA) effort of constructing, instrumenting, and monitoring 12 MnROAD test sections, laboratory performance tests on asphalt mixtures from the test sections, and past field performance data. The proposed tool incorporates field performance data, performance modelling, and life-cycle cost analysisto develop best practices for rehabilitation of PCC with asphalt overlays.
Book Synopsis Preservation Approaches for High-traffic-volume Roadways by : David G. Peshkin
Download or read book Preservation Approaches for High-traffic-volume Roadways written by David G. Peshkin and published by Transportation Research Board. This book was released on 2011 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's second Strategic Highway Research Program (SHRP 2) Report S2-R26-RR-1: Preservation Approaches for High-Traffic-Volume Roadways documents the state of the practice of preservation treatment on asphalt and concrete pavements on high- and low-volume roadways. The report also includes general guidelines on the application of preservation treatments on high-volume roadways. The same project that produced SHRP 2 Report S2-R26-RR-1 also produced SHRP 2 Report S2-R26-RR-2: Guidelines for the Preservation of High-Traffic-Volume Roadways, which explores the state of the practice for preservation treatments on high- and low-volume asphalt and concrete roadways. The report also includes suggested guidelines on the application of preservation treatments on high-volume roadways.
Download or read book The Engineering Index Annual written by and published by . This book was released on 1988 with total page 2282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since its creation in 1884, Engineering Index has covered virtually every major engineering innovation from around the world. It serves as the historical record of virtually every major engineering innovation of the 20th century. Recent content is a vital resource for current awareness, new production information, technological forecasting and competitive intelligence. The world?s most comprehensive interdisciplinary engineering database, Engineering Index contains over 10.7 million records. Each year, over 500,000 new abstracts are added from over 5,000 scholarly journals, trade magazines, and conference proceedings. Coverage spans over 175 engineering disciplines from over 80 countries. Updated weekly.
Author :American Association of State Highway and Transportation Officials Publisher :AASHTO ISBN 13 :1560510552 Total Pages :622 pages Book Rating :4.5/5 (65 download)
Book Synopsis AASHTO Guide for Design of Pavement Structures, 1993 by : American Association of State Highway and Transportation Officials
Download or read book AASHTO Guide for Design of Pavement Structures, 1993 written by American Association of State Highway and Transportation Officials and published by AASHTO. This book was released on 1993 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt: Design related project level pavement management - Economic evaluation of alternative pavement design strategies - Reliability / - Pavement design procedures for new construction or reconstruction : Design requirements - Highway pavement structural design - Low-volume road design / - Pavement design procedures for rehabilitation of existing pavements : Rehabilitation concepts - Guides for field data collection - Rehabilitation methods other than overlay - Rehabilitation methods with overlays / - Mechanistic-empirical design procedures.
Author :National Research Council (U.S.). Transportation Research Board Publisher :Transportation Research Board National Research ISBN 13 : Total Pages :100 pages Book Rating :4.3/5 ( download)
Book Synopsis Flexible Pavement Construction, Performance, and Recycling by : National Research Council (U.S.). Transportation Research Board
Download or read book Flexible Pavement Construction, Performance, and Recycling written by National Research Council (U.S.). Transportation Research Board and published by Transportation Research Board National Research. This book was released on 1992 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Superpave Mix Design by : Asphalt Institute
Download or read book Superpave Mix Design written by Asphalt Institute and published by . This book was released on 2001-01-01 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :American Association of State Highway and Transportation Officials Publisher :AASHTO ISBN 13 :156051423X Total Pages :218 pages Book Rating :4.5/5 (65 download)
Book Synopsis Mechanistic-empirical Pavement Design Guide by : American Association of State Highway and Transportation Officials
Download or read book Mechanistic-empirical Pavement Design Guide written by American Association of State Highway and Transportation Officials and published by AASHTO. This book was released on 2008 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1983 with total page 1368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Using Cost, Mix Design, Construction, and Performance Data to Inform Hot Mix Asphalt Pavement Policy and Standards by : Ryan A. Howell
Download or read book Using Cost, Mix Design, Construction, and Performance Data to Inform Hot Mix Asphalt Pavement Policy and Standards written by Ryan A. Howell and published by . This book was released on 2019 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation integrates and assesses in-service hot mix asphalt pavement data from several typically available but disconnected data sources to inform pavement policy and specification development. This in-service pavement data approach captures connected pavement data from different stages of pavement projects (e.g. mix design, construction, performance after completion) to better understand the relationship between actual in-service performance and mix design, structural design, and construction variables. The dissertation addresses the following research question: what is the value of the in-service pavement data approach in developing hot mix asphalt pavement policy and specifications? To test this question, the dissertation applies this approach using data from 2007 to 2017 to investigate several current Washington State Department of Transportation (WSDOT) research questions. Using the in-service pavement data approach, WSDOT pavement performance questions regarding (1) 3/8-inch versus 1/2-inch nominal maximum aggregate size (NMAS) mixtures, (2) the influence of elevated in-place density mixtures and other mixture characteristics, and (3) high-reclaimed asphalt pavement (RAP) (> 20%) versus up-to-20%-RAP mixtures are analyzed. High level findings include: (1) there is no statistical evidence to suggest a difference in performance between 3/8-inch and 1/2-inch NMAS mixtures; however, the cracking/rutting performance of 3/8-inch NMAS mixtures may be trending higher for older mixtures (ages 9-10); (2) there is no field evidence to suggest an apparent trend between elevated density and increased cracking/rutting performance; however, fine-graded mixture cracking performance may be trending higher than coarse-graded mixtures for older contracts (ages 8-10) and no contracts with a density of 94% or higher perform poorly ([less than or equal to] 50 cracking/rutting condition value); and (3) there is no statistical evidence to suggest a difference in performance between high-RAP (> 20%) and up-to-20%-RAP mixtures. Ultimately, the in-service pavement data approach is a repeatable framework that can be used to better understand the relationship between actual in-service performance and mix design, structural design, and construction variables. Additionally, it is generalizable to any field with large data sets on in-service pavements (e.g. airfields, highways, etc.). Towards this end, the in-service pavement data approach and high-level findings of the WSDOT case studies may be applicable to the U.S. Air Force pavement program.
