Performance, Evaluation, and Rehabilitation of Asphalt-overlaid Concrete Pavements PDF Download
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Author: Kathleen Theresa Hall
Publisher:
ISBN:
Category :
Languages : en
Pages : 592
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Book Description
This research is an in-depth investigation of the performance, evaluation, and rehabilitation of asphalt-overlaid concrete (AC/PCC) pavements. It addresses a critical need to better understand this type of pavement, which is quickly becoming a major portion of the highway mileage of the United States. The analysis of AC/PCC pavement performance includes investigation of AC/PCC pavement distress types, a survival analysis of AC overlays of JRCP, and field studies of AC/PCC pavements. Performance of AC/PCC pavements could be improved by considering traffic level, existing distress, preoverlay repair, and modes of AC overlay deterioration directly in design. Key condition indicators (distress, roughness, serviceability, subjective ratings, and rutting) were investigated to assess their usefulness in AC/PCC rehabilitation project selection. Guidelines are provided for a comprehensive project-level evaluation of AC/PCC pavements, including functional evaluation, structural evaluation, drainage evaluation, and an evaluation of the AC surface mix. Detailed guidelines and procedures were developed for distress surveying, nondestructive deflection testing, coring, and materials testing. A procedure was developed for backcalculation of PCC slab and foundation moduli from AC/PCC pavement deflection data. This backcalculation procedure quickly and repeatably produces results consistent with other backcalculation methods and consistent with observed distress and the condition of cores. Guidelines are given for interpretation and practical use of backcalculation results. Rehabilitation methods for structural, functional, drainage, and AC mix deficiencies in AC/PCC pavements are described. The four structural improvement options presented are second AC overlay, unbonded PCC overlay, fracturing the PCC slab before a new AC overlay, and reconstruction. Approaches to thickness design for the overlay options are summarized. The evaluation and rehabilitation guidelines were developed and tested using case studies of in-service AC/PCC pavements on Illinois Interstates. The case studies demonstrate the collection and analysis of design, construction, traffic, performance, distress, roughness, deflection, coring, and materials data for project-level evaluation and rehabilitation planning and design.
Author: Kathleen Theresa Hall
Publisher:
ISBN:
Category :
Languages : en
Pages : 592
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Book Description
This research is an in-depth investigation of the performance, evaluation, and rehabilitation of asphalt-overlaid concrete (AC/PCC) pavements. It addresses a critical need to better understand this type of pavement, which is quickly becoming a major portion of the highway mileage of the United States. The analysis of AC/PCC pavement performance includes investigation of AC/PCC pavement distress types, a survival analysis of AC overlays of JRCP, and field studies of AC/PCC pavements. Performance of AC/PCC pavements could be improved by considering traffic level, existing distress, preoverlay repair, and modes of AC overlay deterioration directly in design. Key condition indicators (distress, roughness, serviceability, subjective ratings, and rutting) were investigated to assess their usefulness in AC/PCC rehabilitation project selection. Guidelines are provided for a comprehensive project-level evaluation of AC/PCC pavements, including functional evaluation, structural evaluation, drainage evaluation, and an evaluation of the AC surface mix. Detailed guidelines and procedures were developed for distress surveying, nondestructive deflection testing, coring, and materials testing. A procedure was developed for backcalculation of PCC slab and foundation moduli from AC/PCC pavement deflection data. This backcalculation procedure quickly and repeatably produces results consistent with other backcalculation methods and consistent with observed distress and the condition of cores. Guidelines are given for interpretation and practical use of backcalculation results. Rehabilitation methods for structural, functional, drainage, and AC mix deficiencies in AC/PCC pavements are described. The four structural improvement options presented are second AC overlay, unbonded PCC overlay, fracturing the PCC slab before a new AC overlay, and reconstruction. Approaches to thickness design for the overlay options are summarized. The evaluation and rehabilitation guidelines were developed and tested using case studies of in-service AC/PCC pavements on Illinois Interstates. The case studies demonstrate the collection and analysis of design, construction, traffic, performance, distress, roughness, deflection, coring, and materials data for project-level evaluation and rehabilitation planning and design.
Author: Farzana Moon
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Asphalt overlays can be categorized as pavement rehabilitation structural overlays or pavement preservation overlays in terms of the thickness and timing of maintenance activities. Pavement rehabilitation overlay contributes to the structural enhancement of pavements and pavement preservation overlays generally provide functional improvement to an existing pavement. In recent times, the pavement design approach employed by the Louisiana Department of Transportation and Development (LADOTD) has been transitioning from the 1993 AASHTO design procedure to a locally calibrated Pavement ME method. The AASHTOWare Pavement ME (Mechanistic-Empirical) design procedure is considered the modern approach to pavement design. Significant updates have been introduced in the Pavement ME design software in the past few years. Therefore, this study focused on conducting a local calibration of the Pavement ME procedure for asphalt overlays in Louisiana. In addition, performance evaluation of the asphalt overlays was conducted to determine the factors that would have an impact on their performance. In total, 37 rehabilitation asphalt overlay projects and 33 preservation asphalt overlay projects were selected all over Louisiana with different base types and traffic volumes. These projects consisted of mainly three types of bases: soil cement base, crushed stone base and Portland cement concrete base. The pavement performance data were collected from the Louisiana Pavement Management System (LA-PMS) database and the data regarding geographical location, design thickness, and traffic were retrieved from the LADOTD intranet. The field performance of the asphalt overlays was investigated in terms of several design parameters i.e. base type, traffic level, total Hot Mix Asphalt (HMA) thickness after milling, pavement precondition and overlay service life. Manual calibration of Pavement ME was performed for rehabilitation asphalt overlays and a calibrator assistance tool was adopted for the local calibration of preservation asphalt overlays to calibrate the performance models in terms of typical pavement structure, traffic, and weather conditions of Louisiana. The results showed that the existing pavement condition does have an impact on preservation overlay performance since distress in pavements with poor precondition was observed to be higher. The pavement with good precondition and higher asphalt concrete (AC) thickness exhibited higher service life. A case study was performed to determine the optimal timing of preservation overlay applications based on cost-benefit analysis. Fatigue cracking was under-predicted and transverse cracking was over-predicted by the Pavement ME national model for rehabilitation overlays. For preservation overlays, both the fatigue cracking and transverse cracking were under-predicted. Therefore, the performance models were adjusted through the local calibration to match the field measurement.
Author: Daniel Okpala
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 50
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Book Description
Author:
Publisher:
ISBN:
Category : Pavements, Concrete
Languages : en
Pages : 192
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Book Description
Author: Sedat Gulen
Publisher:
ISBN: 9781622602025
Category :
Languages : en
Pages :
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Book Description
Author: Kathleen Theresa Hall
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 62
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Book Description
More than 60% of Illinois' Interstate concrete pavements have already been overlaid with asphalt, and by some estimates nearly 100% of Illinois' Interstate system (excluding recently constructed and reconstructed sections) are expected to have been overlaid at least once by the year 2000. Evaluation and rehabilitation of asphalt-overlaid concrete (AC/PCC) pavements have therefore become increasingly prominent and pressing concerns. Project IHR-532 is a cooperative research study between the Illinois Department of Transportation and the University of Illinois entitled "Rehabilitation of Asphalt-Overlaid Concrete Pavements". The objective of this study is to develop practical guidelines for evaluation and rehabilitation of AC/PCC pavements. These guidelines have been developed and presented in five reports which encompass AC/PCC pavement deterioration and survival, evaluation, rehabilitation, and selected case studies. This final report presents a summary of these guidelines.
Author: Kathleen T. Hall
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 154
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Book Description
This report demonstrates the application of the AC/PCC pavement evaluation and rehabilitation guidelines to several in-service case studies. The case studies were used throughout this research study to develop, test, and revise the evaluation and rehabilitation guidelines. The product of this iterative development effort is a step-by-step process for selection and design of appropriate rehabilitation strategies for AC/PCC pavements. The case study analyses also demonstrate the difficulty of complete project-level evaluation, the need for accurate and up-to-date data (especially condition data), and the importance of experience and good engineering judgment in the many decisions which must be made regarding pavement rehabilitation planning and design.
Author: Kathleen Theresa Hall
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 106
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Book Description
This report presents guidelines for selection of rehabilitation strategies for asphalt-overlaid concrete (AC/PCC) pavements, summarizes the performance of second AC overlays of AC/PCC pavements on Illinois Interstates, and presents procedures for design of three types of overlays of AC/PCC pavements: second AC overlay; unbonded PCC overlay; and AC overlay of rubblized PCC with the existing AC removed. The overlay design procedures are based on the 1993 revised AASHTO overlay design procedures, customized for Illinois conditions. A practical catalog of rehabilitation designs is presented for AC/PCC pavements in various categories of condition, traffic level, and PCC pavement type.
Author: Brian K. Diefenderfer
Publisher:
ISBN:
Category : Interstate 64
Languages : en
Pages : 52
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Book Description
Beginning in 2004, the Virginia Department of Transportation (VDOT) undertook a series of pavement rehabilitation projects to address deficiencies in three sections of the I-64 corridor between Richmond and Newport News. I-64 serves as the primary avenue between the Richmond and Hampton Roads metropolitan areas and carries a combined traffic volume ranging from approximately 20,000 to 90,000 vehicles per day. For nearly 100 mi, this roadway is a four-lane divided facility that was originally built between the late 1960s and early 1970s as either a jointed reinforced or continuously reinforced concrete pavement. The existing concrete pavement was rehabilitated using three rehabilitation procedures: two standard approaches and an experimental approach. The standard rehabilitation procedures included the use of full-depth portland cement concrete (PCC) patches overlaid by a hot-mix asphalt (HMA) overlay and full-depth PCC patches followed by grinding of the pavement surface. The experimental rehabilitation procedure consisted of the use of full- and partial-depth HMA patches followed by an HMA overlay. The purpose of this study was to document the initial condition and performance to date of the I-64 project and to summarize similar work performed by state departments of transportation other than VDOT. The pavement rehabilitation cost per lane-mile was nearly 20% less for the section of I-64 for which full-depth PCC patches followed by grinding of the pavement surface was used than for the other two sections. However, the experimental results do not allow for a comparison to determine any differences in the structural capacity or service life between the sections. The study recommends that VDOT's Materials Division annually monitor the ride quality of the pavement in the three rehabilitated sections of I-64 so that the end of service life can be defined as the pavement roughness increases because of deterioration. Further, the Virginia Transportation Research Council should collaborate with other research organizations to encourage and pursue full-scale or laboratory-scale accelerated pavement testing to determine the optimum repair materials and methods for pre-overlay repair of existing PCC pavements and to develop models to quantify the deterioration of an asphalt overlay placed over an existing concrete pavement because of reflection cracking.
Author: Kathleen Theresa Hall
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 126
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Book Description
This report presents guidelines for selection of asphalt-overlaid concrete (AC/PCC) pavements for rehabilitation, collection of distress data, recognition of AC/PCC pavement distress modes, nondestructive deflection testing, materials sampling, and overall project-level evaluation. Key condition indicators (distress, rutting, roughness, serviceability, and CRS) were examined to address their usefulness in AC/PCC rehabilitation project selection. Critical levels for these indicators were identified, and available prediction models were investigated for use in rehabilitation programming. The project-level evaluation procedure includes guidelines for field and laboratory data collection and analysis for structural evaluation, functional evaluation, drainage evaluation, and AC surface material evaluation. A procedure was developed for backcalculation of AC/PCC pavement layer elastic moduli from deflection measurements, and guidelines were developed for practical interpretation of the backcalculation results. The recommended evaluation procedure relies on conventional testing and evaluation methods (visual surveying, deflection testing, coring, materials testing, etc.). New technologies (e.g., ground-penetrating radar, infrared thermography) are developing which have potential for use in pavement evaluation. These technologies are also reviewed in this report.
