Development of Design Guide for Thin and Ultra-thin Concrete Overlays of Existing Asphalt Pavements, Task 2 PDF Download
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Author: Feng Mu
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 153
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Book Description
The existing ultra-thin whitetopping (UTW) and thin whitetopping (TWT) design methods are reviewed so that any gaps in the design process can be identified. Four design methods are included, namely the Colorado Department of Transportation (CDOT) method, the New Jersey Department of Transportation method, the Portland Cement Association (PCA) method, and the Illinois Centre for Transportation (ICT) method. The structural response and performance models used in these methods are evaluated using field data from the whitetopping sections at MnROAD. Based on these evaluation, the PCA structural model developed for the calculation of stress in the corner and at the top of the overlay seems more suitable for the prediction of the structural response of UTW and the CDOT structural model developed for the calculation of stress at the lane/shoulder edge and at the bottom of the overlay is more suitable for TWT. It is also found that the use of a temperature-dependent asphalt modulus of elasticity results in significantly higher fatigue damage in the overlay, which is ignored by all four methods. Finally, the asphalt fatigue analysis incorporated in some of these design procedures is does not result in fatigue failure of the hot mix asphalt and therefore need not be considered when designing these overlays.
Author: Feng Mu
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 153
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Book Description
The existing ultra-thin whitetopping (UTW) and thin whitetopping (TWT) design methods are reviewed so that any gaps in the design process can be identified. Four design methods are included, namely the Colorado Department of Transportation (CDOT) method, the New Jersey Department of Transportation method, the Portland Cement Association (PCA) method, and the Illinois Centre for Transportation (ICT) method. The structural response and performance models used in these methods are evaluated using field data from the whitetopping sections at MnROAD. Based on these evaluation, the PCA structural model developed for the calculation of stress in the corner and at the top of the overlay seems more suitable for the prediction of the structural response of UTW and the CDOT structural model developed for the calculation of stress at the lane/shoulder edge and at the bottom of the overlay is more suitable for TWT. It is also found that the use of a temperature-dependent asphalt modulus of elasticity results in significantly higher fatigue damage in the overlay, which is ignored by all four methods. Finally, the asphalt fatigue analysis incorporated in some of these design procedures is does not result in fatigue failure of the hot mix asphalt and therefore need not be considered when designing these overlays.
Author: Nenad Gucunski
Publisher:
ISBN:
Category : Fiber-reinforced concrete
Languages : en
Pages : 78
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Book Description
Concrete overlay of deteriorated asphalt pavements (whitetopping) has been a viable alternative to improve the pavement's structural integrity for over six decades. The thickness of such overlay usually exceeds five inches. In the last few years, however, a newer technology has emerged which is commonly known as Ultra Thin Whitetopping (UTW). UTW is a construction technique, which involves placement of a thinner (than normal) thickness ranging from 2 to 4 inches. he intent of this research study is to identify and address important factors that contribute to the performance of the UTW pavement system. It is also the goal of this research to present an interim design procedure fine tuned by further observation of UTW systems.
Author: William G. Buttlar
Publisher: Springer
ISBN: 3319768492
Category : Technology & Engineering
Languages : en
Pages : 256
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Book Description
Premature cracking in asphalt pavements and overlays continues to shorten pavement lifecycles and creates significant economic and environmental burden. In response, RILEM Technical Committee TC 241-MCD on Mechanisms of Cracking and Debonding in Asphalt and Composite Pavements has conducted a State-of-the-Art Review (STAR), as detailed in this comprehensive book. Cutting-edge research performed by RILEM members and their international partners is presented, along with summaries of open research questions and recommendations for future research. This book is organized according to the theme areas of TC 241-MCD - i.e., fracture in the asphalt bulk material, interface debonding behaviour, and advanced measurement systems. This STAR is expected to serve as a long term reference for researchers and practitioners, as it contributes to a deeper fundamental understanding of the mechanisms behind cracking and debonding in asphalt concrete and composite pavement systems.
Author: J. Paul Guyer, P.E., R.A.
Publisher: Guyer Partners
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 31
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Book Description
Introductory technical guidance for civil engineers, highway engineers and construction managers interested in pavement construction and maintenance. Here is what is discussed: 1. INTRODUCTION, 2. BENEFITS AND LIMITATIONS, 3. WHEN TO APPLY, 4. DENSE-GRADED ASPHALT MIXTURE DESIGN FOR THIN ASPHALT OVERLAYS, 5. PRESERVATION PROJECT DEVELOPMENT AND PAVEMENT STRUCTURE DESIGN, 6. CONSTRUCTION PRACTICES AND QUALITY CONTROL, 7. PERFORMANCE, 8. SUMMARY.
Author:
Publisher:
ISBN:
Category : Highway research
Languages : en
Pages : 138
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Book Description
This publication provides a guide to the Minnesota Department of Transportation's current research activities.
Author: J. Paul Guyer, P.E., R.A.
Publisher: Guyer Partners
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 31
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Book Description
Introductory technical guidance for civil engineers and construction managers interested in thin concrete overlays for street and highway pavements. Here is what is discussed: 1. INTRODUCTION, 2. OVERVIEW OF THIN CONCRETE OVERLAYS, 3. DESIGN OF THIN CONCRETE OVERLAYS, 4. CONSTRUCTION OF THIN CONCRETE OVERLAYS, 5. COST, 6. CASE STUDIES, 7. SUMMARY.
Author: J. Paul Guyer, P.E., R.A.
Publisher: Guyer Partners
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 25
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Book Description
Introductory technical guidance for civil engineers and construction managers interested in street and highway pavement preservation using thin asphalt overlays. Here is what is discussed: 1. INTRODUCTION 2. BENEFITS AND LIMITATIONS 3. WHEN TO APPLY 4. DENSE-GRADED ASPHALT MIXTURE DESIGN FOR THIN ASPHALT OVERLAYS 5. PRESERVATION PROJECT DEVELOPMENT AND PAVEMENT STRUCTURE DESIGN 6. CONSTRUCTION PRACTICES AND QUALITY CONTROL 7. PERFORMANCE 8. SUMMARY.
Author: Robert Otto Rasmussen
Publisher: Transportation Research Board
ISBN: 0309070198
Category : Pavements
Languages : en
Pages : 96
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Book Description
TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 338: Thin and Ultra-Thin Whitetopping summarizes available information to document how state departments of transportation and others are currently using thin and ultra-thin whitetopping overlays among various pavement rehabilitation alternatives. The report covers all stages of the proper application of whitetopping overlays, including project selection, design, materials selection, construction, maintenance, and eventual rehabilitation or replacement.
Author:
Publisher:
ISBN:
Category : Air travel
Languages : en
Pages : 570
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Book Description
Author: J. Paul Guyer, P.E., R.A.
Publisher: Guyer Partners
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 26
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Book Description
Introductory technical guidance for civil engineers and construction managers interested in thin concrete overlays for street and highway pavements. Here is what is discussed: 1. INTRODUCTION 2. OVERVIEW OF THIN CONCRETE OVERLAYS 3. DESIGN OF THIN CONCRETE OVERLAYS 4. CONSTRUCTION OF THIN CONCRETE OVERLAYS 5. COST 6. CASE STUDIES 7. SUMMARY.
