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Author: Harikrishnan Nair Publisher: ISBN: Category : Low-volume roads Languages : en Pages : 26
Book Description
The Virginia Department of Transportation (VDOT) maintains more than 100,500 lane-miles of pavement on the secondary network. Of this total, more than 95% of the lane-miles have an annual average daily traffic of less than 3,500 vehicles. Pavement recycling techniques (such as full depth reclamation [FDR] and cold in-place recycling) can be used to fix many underlying issues in an existing pavement and when combined with thin surfacings, where appropriate, can help VDOT maintain low volume roads and provide significant cost and environmental savings. However, VDOT has limited experience using pavement recycling techniques (especially FDR) where pavement is overlaid with thin surfacings. The purpose of this study was to document the performance baseline for a series of FDR sections having thin surfacings on lower volume traffic routes since the performance of these types of pavements was previously unknown. This study summarized the construction and initial performance of the FDR field projects on Rte. 602 in Surry County in VDOT’s Hampton Roads District and at Estates at Leeland in Spotsylvania County in VDOT’s Fredericksburg District; in addition, an inventory was conducted and the performance of past VDOT FDR projects on lower traffic routes was evaluated. The study found that the initial performance of the FDR project on Rte. 602 (having three thin surfacing treatments) and the FDR project at Estates at Leeland (having a 2-in asphalt concrete surface) was promising at early ages. However, the information gathered to date is not sufficient to make conclusions about the long-term performance of FDR with thin surfacings. In general, for the past FDR projects reviewed, based on visual surveys and data from VDOT’s Pavement Management System, FDR with 2 to 4 in of asphalt concrete surface performed well at ages of 7 to 13 years after construction. The study recommends continued performance assessment of the FDR sites surveyed in this study and additional field trials on the secondary network system using FDR with thin surfacings. Further research is also recommended to develop a framework to consider using performance data from VDOT’s Pavement Management System to predict the future conditions of pavement sections on the secondary network. Being able to identify those sections that could benefit from FDR treatments in the future would allow VDOT to allocate funding proactively for those sections based on early findings from this study.
Author: Harikrishnan Nair Publisher: ISBN: Category : Low-volume roads Languages : en Pages : 26
Book Description
The Virginia Department of Transportation (VDOT) maintains more than 100,500 lane-miles of pavement on the secondary network. Of this total, more than 95% of the lane-miles have an annual average daily traffic of less than 3,500 vehicles. Pavement recycling techniques (such as full depth reclamation [FDR] and cold in-place recycling) can be used to fix many underlying issues in an existing pavement and when combined with thin surfacings, where appropriate, can help VDOT maintain low volume roads and provide significant cost and environmental savings. However, VDOT has limited experience using pavement recycling techniques (especially FDR) where pavement is overlaid with thin surfacings. The purpose of this study was to document the performance baseline for a series of FDR sections having thin surfacings on lower volume traffic routes since the performance of these types of pavements was previously unknown. This study summarized the construction and initial performance of the FDR field projects on Rte. 602 in Surry County in VDOT’s Hampton Roads District and at Estates at Leeland in Spotsylvania County in VDOT’s Fredericksburg District; in addition, an inventory was conducted and the performance of past VDOT FDR projects on lower traffic routes was evaluated. The study found that the initial performance of the FDR project on Rte. 602 (having three thin surfacing treatments) and the FDR project at Estates at Leeland (having a 2-in asphalt concrete surface) was promising at early ages. However, the information gathered to date is not sufficient to make conclusions about the long-term performance of FDR with thin surfacings. In general, for the past FDR projects reviewed, based on visual surveys and data from VDOT’s Pavement Management System, FDR with 2 to 4 in of asphalt concrete surface performed well at ages of 7 to 13 years after construction. The study recommends continued performance assessment of the FDR sites surveyed in this study and additional field trials on the secondary network system using FDR with thin surfacings. Further research is also recommended to develop a framework to consider using performance data from VDOT’s Pavement Management System to predict the future conditions of pavement sections on the secondary network. Being able to identify those sections that could benefit from FDR treatments in the future would allow VDOT to allocate funding proactively for those sections based on early findings from this study.
Author: Donald N. Geoffroy Publisher: Transportation Research Board ISBN: 9780309061230 Category : Technology & Engineering Languages : en Pages : 124
Book Description
This synthesis report will be of interest to pavement design engineers in local, state, and federal transportation agencies. Pavement materials, construction, and maintenance engineers will also find it of interest. In addition, it will be of interest to local technology transfer centers and pavement research engineers. This synthesis describes the state of the practice for thin-surfaced pavement project selection and structural design. It does not establish preferential design criteria (e.g., mix design) nor does it systematically evaluate existing design methods. This report of the Transportation Research Board describes the conditions in which thin-surfaced pavements are considered appropriate, what thin-surfaced pavement types are considered appropriate for given conditions, and the decision criteria used in their selection. Information for the synthesis was collected by surveying state and local transportation agencies and by conducting a literature search, including foreign resources. Case studies and an extensive collection of survey data are presented.
Author: David Robert Luhr Publisher: ISBN: 9780893122478 Category : Pavements, Asphalt Languages : en Pages : 15
Book Description
Full-depth reclamation (FDR) is a roadway rehabilitation process that recycles the materials from deteriorated asphalt pavement, and, with the addition of portland cement, creates a new stabilized base. This guide to FDR discusses its applications, benefits, design, construction, and testing.
Author: David G. Peshkin Publisher: Transportation Research Board ISBN: 0309128919 Category : Technology & Engineering Languages : en Pages : 179
Book Description
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.
Author: Garret D. Reeder Publisher: ISBN: Category : Pavements, Asphalt Languages : en Pages : 90
Book Description
As the nation’s infrastructure ages, agencies at all levels are tasked with maintaining and rehabilitating their infrastructure. Sustainable engineering technologies in pavement rehabilitation, such as full-depth reclamation (FDR), could be the answer for agencies in their quest to provide taxpayers with high-quality infrastructure while being good stewards of public funds. Full-depth reclamation of asphalt pavement is a rehabilitation method that involves recycling an existing asphalt pavement and its underlying layer(s) into a new base layer. The FDR process begins with using a road reclaimer to pulverize an existing asphalt pavement and a portion of the underlying base, subbase, and/or subgrade. Usually the pulverized material is uniformly blended with an additional stabilizing material such as cement to provide an upgraded, homogeneous material. Finally, the stabilized material is compacted in place with rollers. The result is a stiff, stabilized base that is ready for a new rigid or flexible surface course. This guide introduces the FDR with cement process and discusses issues related to project selection, design, construction, and testing/quality control.
Author: Wynand JvdM. Steyn Publisher: Transportation Research Board ISBN: 0309223660 Category : Technology & Engineering Languages : en Pages : 257
Book Description
"TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 433: Significant Findings from Full-Scale Accelerated Pavement Testing documents and summarizes significant findings from the various experimental activities associated with full-scale accelerated pavement testing (f-sAPT) programs that have taken place between 2000 and 2011. The report also identifies gaps in knowledge related to f-sAPT and where future research may be needed. NCHRP Synthesis 433 is designed to expand the f-sAPT base of knowledge documented in NCHRP Syntheses 325 and 235, both with the same title of Significant Findings from Full-Scale Accelerated Pavement Testing. f-sAPT is the controlled application of a wheel loading, at or above the appropriate legal load limit, to a pavement system to determine pavement response in a compressed time period. The acceleration of damage is achieved by one or more of the following factors: increased repetitions, modified loading conditions, imposed climatic conditions, and thinner pavements with a decreased structural capacity which have shorter design lives"--
Author: Ken Skorseth Publisher: ISBN: Category : Gravel roads Languages : en Pages : 112
Book Description
The purpose of this manual is to provide clear and helpful information for maintaining gravel roads. Very little technical help is available to small agencies that are responsible for managing these roads. Gravel road maintenance has traditionally been "more of an art than a science" and very few formal standards exist. This manual contains guidelines to help answer the questions that arise concerning gravel road maintenance such as: What is enough surface crown? What is too much? What causes corrugation? The information is as nontechnical as possible without sacrificing clear guidelines and instructions on how to do the job right.
Author: Jon A. Epps Publisher: Transportation Research Board ISBN: 9780309049115 Category : Technology & Engineering Languages : en Pages : 116
Book Description
This synthesis will be of interest to pavement designers, construction engineers, and others interested in economical methods for reconstructing or rehabilitating bituminous pavements. Information is provided on the processes and procedures used by a number of states to recycle asphalt pavements in place without application of heat. Since 1975 a growing number of state highway agencies have reconstructed or rehabilitated asphalt pavements by recycling the old pavement in place. This report of the Transportation Research Board describes the processes used for cold in-place recycling, including construction procedures, mix designs, mixture properties, performance, and specifications.
Author: Harikrishnan Nair
Author: Harikrishnan Nair
Author: Donald N. Geoffroy
Author: David Robert Luhr
Author: David G. Peshkin
Author: Garret D. Reeder
Author: Wynand JvdM. Steyn
Author: Asphalt Institute
Author: Ken Skorseth
Author: National Cooperative Highway Research Program
Author: Jon A. Epps