Transcription
Guide to the Design ofCONCRETEOVERLAYSUsing Existing Methodologies1993 AASHTOAASHTOWare Pavement ME DesignBonded Concrete Over Asphalt (BCOA)October 2012
On the CoverAASHTOWare Pavement ME DesignAmerican Concrete Pavement Association(ACPA); Bonded Concrete Over Asphalt (BCOA)1993 AASHTO Guide for Design of Pavement Structures (1993 AASHTO Guide),nomographs
Technical Report Documentation Page1. Report No.2. Government Accession No.3. Recipient’s Catalog No.DTFH61-06-H-00011 (Work Plan 13)4. Title and SubtitleGuide to the Design of Concrete Overlays Using Existing Methodologies5. Report DateOctober 20126. Performing Organization Code7. Author(s)Helga N. Torres , P.E., The Transtec Group, Inc.Jeff Roesler , Ph.D., P.E., University of Illinois at Urbana-ChampaignRobert Otto Rasmussen , Ph.D., P.E., The Transtec Group, Inc.Dale Harrington , P.E., Snyder and Associates, Inc.8. Performing Organization Report No.9. Performing Organization Name and AddressNational Concrete Pavement Technology CenterInstitute for Transportation, Iowa State University2711 South Loop Drive, Suite 4700Ames, IA 50010-866410. Work Unit No. (TRAIS)12. Sponsoring Organization Name and AddressFederal Highway Administration (FHWA)U.S. Department of Transportation1200 New Jersey Avenue SEWashington, DC 2059011. Contract or Grant No.13. Type of Report and Period CoveredManual14. Sponsoring Agency CodeDTFH61-06-H-00011 (Work Plan 13)15. Supplementary Notes16. AbstractThe Guide to the Design of Concrete Overlays Using Existing Methodologies is a product of the National Concrete PavementTechnology Center (CP Tech Center) at Iowa State University’s Institute for Transportation. The guide provides decision makers andpractitioners with straightforward, simple guidance for the design of concrete overlays using existing methodologies. The guide focuses on four commonly used methods: The method described in the 1993 AASHTO Guide for Design of Pavement Structures, 4th Edition. The method described in the AASHTO Mechanistic-Empirical Pavement Design Guide, Interim Edition: A Manual of Practice. The ACPA modified method for bonded concrete overlays of asphalt pavements. The Colorado Department of Transportation method for bonded concrete overlays of asphalt pavements.The guide discusses specific design assumptions, deficiencies, and strengths inherent in each method, as well as step-by-step designexamples for typical pavement sections that are viable concrete overlay candidates.This guide is intended to be used in conjunction with the corresponding design procedures’ documentation/references, such as the 1993AASHTO Guide for Design of Pavement Structures and/or computer software for the AASHTO Mechanistic-Empirical PavementDesign Guide and ACPA methods.17. Key Wordsconcrete pavement, concrete overlays, concrete overlay design methodologies18. Distribution StatementNo restrictions.19. Security Classification (of thisreport)Unclassified.21. No. of PagesForm DOT F 1700.7 (8-72)20. Security Classification (of thispage)Unclassified.22. Price69Reproduction of completed page authorized
Guide to the Design of Concrete OverlaysUsing Existing MethodologiesFHWA Project DTFH61-06-H-00011 (Work Plan 13)October 2012AuthorsHelga N. Torres, The Transtec Group, Inc.Jeff Roesler, University of Illinois at Urbana-ChampaignRobert Otto Rasmussen, The Transtec Group, Inc.Dale Harrington, Snyder and Associates, Inc.Contributing Technical AuthorJulie M. Vandenbossche, University of PittsburghEditorial StaffSabrina Shields-Cook, Managing EditorPeter Hunsinger, CopyeditorWendy Stribe, Graphic Designer
About This GuideAcknowledgmentsThe Guide to the Design of Concrete Overlays Using ExistingThe National Concrete Pavement Technology Center (CP TechMethodologies is a product of the National Concrete PavementCenter) and the authors wish to thank the Federal HighwayTechnology Center at Iowa State University’s Institute for Trans-Administration (FHWA) for sponsoring this project and therebyportation. The guide provides decision makers and practitionersimproving the state of the practice of concrete overlay design.with straightforward, simple guidance for the design of concreteWe particularly appreciate the help of Gina Ahlstrom, whooverlays using existing methodologies.managed this contract for the FHWA. We are also grateful toThe guide focuses on four commonly used methods: The method described in the 1993 American Associationof State Highway and Transportation Officials (AASHTO)Guide for Design of Pavement Structures, 4th Edition. The method described in the AASHTO Mechanistic-EmpiricalPavement Design Guide, Interim Edition: A Manual of Practice. The American Concrete Pavement Association (ACPA)modified method for bonded concrete overlays of asphaltpavements. The Colorado Department of Transportation method forbonded concrete overlays of asphalt pavements.The guide discusses specific design assumptions, deficiencies,and strengths inherent in each method, as well as step-by-stepdesign examples for typical pavement sections.This guide is intended to be used in conjunction with the corresponding design procedures’ documentation/references, such asthe 1993 AASHTO Guide for Design of Pavement Structures and/orcomputer software for the AASHTO Mechanistic-Empirical Pavement Design Guide and ACPA methods.the contributions of Sabrina I. Garber and Jesse Kwilosz of TheTranstec Group, Inc., as well as all the knowledgeable and experienced professionals on the Technical Advisory Committee whocontributed to the development of this guide.Technical Advisory CommitteeNorbert Delatte, Cleveland State UniversityGerald F. Voigt, ACPA NationalGina M. Ahlstrom, Federal Highway AssociationJames K. Cable, Cable Concrete ConsultationJay E. Goldbaum, Colorado Department of TransportationJeff Uhlmeyer, Washington State Department of TransportationJohn P. Donahue, Missouri Department of TransportationLeif Wathne, ACPA NationalRandell Riley, Illinois Chapter ACPARobert Rodden, ACPA NationalSam Tyson, Federal Highway AdministrationMichael Ayers, Global Pavement Consultants, Inc.Steve Waalkes, Michigan Concrete Paving AssociationSuneel Vanikar, Federal Highway AdministrationTommy Nantung, Indiana Department of TransportationFor More InformationMissionSabrina Shields-Cook, Communications ManagerNational Concrete Pavement Technology Center2711 S. Loop Drive, Suite 4700Ames, IA chcenter.org/The mission of the National Concrete Pavement Technology Center is to unitekey transportation stakeholders around the central goal of advancing concrete pavement stakeholders around the central goal of advancing concretepavement technology through research, technology transfer, and technologyimplementation.DisclaimersNeither Iowa State University nor this document’s authors, editors, designers,illustrators, distributors, or technical advisors make any representations orwarranties, expressed or implied, as to the accuracy of information herein anddisclaim liability for any inaccuracies.Iowa State University does not discriminate on the basis of race, color, age, religion, national origin, sexual orientation, gender identity, sex, marital status,disability, genetic testing, or status as a U.S. veteran. Inquiries can be directedto the Director of Equal Opportunity and Diversity, Iowa State University,3680 Beardshear Hall, 515-294-7612.
Photo CreditsThe photos throughout this guide were provided by the following individuals and organizations:Figure 1 from Harrington et al. 2008, Guide to Concrete Overlays,courtesy of the National Concrete Pavement Technology Center.Figures 2-5, 8, 10, 13-15, 27, 29, 31, 39, 47, 57 courtesy of TheTranstec Group, Inc.Figures 6, 7, 18-26, 33-38, 40-46, 49-56, 59-65 represent screencaptures from AASHTOWare Pavement ME Design software(formerly DARWin-ME software).Figures 9, 28, 30 represent screen captures from the ACPA BCOAweb application (http://apps.acpa.org/apps/bcoa.aspx).Figure 11 courtesy of the Missouri/Kansas ACPA.Figure 12 from ACPA Technical Bulletin TB-005P, Guidelines forConcrete Overlays.Figures 16, 17, 32, 48, 58 from 1993 AASHTO Guide for Design ofPavement Structures, 4th Edition.
ContentsList of Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiList of Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.1 Overview of Bonded Concrete Layers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21.2 Overview of Unbonded Concrete Layers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Background of Design Methodologies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32.1 1993 AASHTO Guide Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32.2 AASHTO Pavement ME Design Guide Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42.3 ACPA BCOA Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52.4 CDOT Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62.5 FHWA Pooled TPF-5(165) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62.6 Design Methodology Applicability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 Bonded Concrete Overlay Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83.1 Bonded Overlays of Concrete Pavements, 1993 AASHTO Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83.1.1 Critical Design Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103.2 Bonded Overlays of Concrete Pavements, AASHTO Pavement ME Design Guide . . . . . . . . . . . . . . . . . . . . . . . . . . 103.2.1 Traffic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103.2.2 Foundation Support, Pavement Type Design Properties, and Rehabilitation . . . . . . . . . . . . . . . . . . . . . . . . . 113.2.3 Climate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123.2.4 Pavement Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123.2.5 Critical Design Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133.3 Bonded Overlays of HMA and Composite Pavements, ACPA Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133.3.1 Critical Design Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144 Unbonded Concrete Overlay Design Allowing for Design Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144.1 Unbonded Overlays of Concrete and Composite Pavements, 1993 AASHTO Guide . . . . . . . . . . . . . . . . . . . . . . . . 164.1.1 Separator Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164.1.2 Critical Design Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164.2 Unbonded Overlays of Concrete and Composite Pavements, AASHTO Pavement ME Design Guide . . . . . . . . . 174.2.1 Pavement Type Design Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174.2.2 Pavement Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184.2.3 Critical Design Variable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184.3 Unbonded Concrete Overlays of Asphalt Pavements, 1993 AASHTO Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184.3.1 Critical Design Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Guide to the Design of Concrete Overlays Using Existing Methodologiesvii
4.4 Unbonded Concrete Overlays of Asphalt Pavements, AASHTO Pavement ME Design Guide . . . . . . . . . . . . . . . . 184.4.1 Separator Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185 Overlay Design Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195.1 Bonded Overlay over Existing Concrete Pavement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195.1.1 Scenario . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195.1.2 1993 AASHTO Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.1.3 1993 AASHTO Guide: Critical Design Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225.1.4 AASHTO Pavement ME Design Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225.1.5 AASHTO Pavement ME Design Guide: Critical Design Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245.1.6 Summary of Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255.2 Bonded Overlay over Existing Asphalt Pavement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275.2.1 Scenario . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275.2.2 ACPA BCOA Thickness Designer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275.2.3 ACPA BCOA Thickness Designer: Critical Design Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295.2.4 Summary of Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295.3 Bonded Overlay over Existing Composite Pavement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295.3.1 Scenario . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295.3.2 ACPA BCOA Thickness Designer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315.3.3 ACPA BCOA Thickness Designer: Critical Design Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315.3.4 Summary of Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315.4 Unbonded Overlay over Existing Concrete Pavement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325.4.1 Scenario . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325.4.2 1993 AASHTO Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325.4.3 1993 AASHTO Guide: Critical Design Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 335.4.4 AASHTO Pavement ME Design Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 345.4.5 AASHTO Pavement ME Design Guide: Critical Design Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375.4.6 Summary of Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375.5 Unbonded Overlay over Existing Asphalt Pavement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375.5.1 Scenario . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375.5.2 1993 AASHTO Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 385.5.3 1993 AASHTO Guide: Critical Design Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 385.5.4 AASHTO Pavement ME Design Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 395.5.5 AASHTO Pavement ME Design Guide: Critical Design Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 415.5.6 Summary of Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42viiiGuide to the Design of Concrete Overlays Using Existing Methodologies
5.6 Unbonded Overlay over Existing Composite Pavement (CRCP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 425.6.1 Scenario . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 425.6.2 1993 AASHTO Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 435.6.3 1993 AASHTO Guide: Critical Design Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 445.6.4 AASHTO Pavement ME Design Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 445.6.5 AASHTO Pavement ME Design Guide: Critical Design Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 475.6.6 Summary of Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 485.7 Unbonded Overlay over Existing Composite Pavement (JPCP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 485.7.1 Scenario . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 495.7.2 1993 AASHTO Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 495.7.3 1993 AASHTO Guide: Critical Design Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 505.7.4 AASHTO Pavement ME Design Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 505.7.5 AASHTO Pavement ME Design Guide: Critical Design Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 535.7.6 Summary of Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 536 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 547 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54Guide to the Design of Concrete Overlays Using Existing Methodologiesix
List of FiguresFigure 1. Bonded and Unbonded Concrete Overlay Systems (Harrington et al. 2008) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Figure 2. Bonded Concrete Overlay, 4.5 in. Thick . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Figure 3. Application of Asphalt Separation Layer to Existing Concrete Pavement for Unbonded Concrete Overlay. . . . . . 3Figure 4. Illustration of Structural Capacity Loss over Time and with Traffic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Figure 5. Illustration of Bonded Overlay of Existing Concrete Pavement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Figure 6. Screen Capture of AASHTOWare Pavement ME Design Traffic Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Figure 7. Screen Capture of AASHTOWare Pavement ME Design Pavement Structure/Layers Menu. . . . . . . . . . . . . . . . . . . 12Figure 8. Bonded Concrete Overlay of Asphalt Pavement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Figure 9. ACPA BCOA thickness design web-based application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Figure 10. Illustration of Unbonded Overlay of Existing Concrete Pavement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Figure 11. Construction of Unbonded Overlay with Nonwoven Geotextile Interlayer (Courtesy Missouri/KansasACPA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Figure 12. Unbonded Overlays - Mismatching Joints (ACPA 1990). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Figure 13. Asphalt Separation Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Figure 14. Illustration of Unbonded Overlay of Existing Asphalt Pavement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Figure 15. Summary of Existing Pavement Cross-Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Figure 16. Figure 5.12 from Part III of 1993 AASHTO Guide Used to Determine Fjc for Bonded Overlays . . . . . . . . . . . . . . . 21Figure 17. Figure 5.2 in Part III of the 1993 AASHTO Guide to Determine CF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Figure 18. Screen Capture of AASHTOWare Pavement ME Design JPCP Design Properties Menu . . . . . . . . . . . . . . . . . . . . 23Figure 19. AASHTOWare Pavement ME Design Distress Prediction Summary for 2 in. Overlay . . . . . . . . . . . . . . . . . . . . . . 25Figure 20. AASHTOWare Pavement ME Design Predicted Faulting Plot for 2 in. Overlay . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Figure 21. AASHTOWare Pavement ME Design Predicted Cracking Plot for 2 in. Overlay. . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Figure 22. AASHTOWare Pavement ME Design Predicted IRI Plot for 2 in. Overlay. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Figure 23. AASHTOWare Pavement ME Design Distress Prediction Summary for CTE: 6.1 (10-6/ F) and 2 in. Overlay . . 26Figure 24. AASHTOWare Pavement ME Design Distress Prediction Summary for CTE: 6.1 (10-6/ F) and 3 in. Overlay . . 26Figure 25. AASHTOWare Pavement ME Design Distress Prediction Summary for 2 in. Overlay. Overlay and ExistingPavement CTE: 6.1 and 4.5 (10-6/ F), respectively . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Figure 26. AASHTOWare Pavement ME Design Distress Prediction Summary for 3 in. Overlay. Overlay and ExistingPavement CTE: 6.1 and 4.5 (10-6/ F), Respectively . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Figure 27. Summary of Existing Pavement Cross-Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Figure 28. Screen Capture of ACPA BCOA Thickness Designer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Figure 29. Summary of Existing Pavement Cross-Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Figure 30. Screen Capture of ACPA BCOA Thickness Designer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30Figure 31. Summary of Existing Pavement Cross-Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32Guide to the Design of Concrete Overlays Using Existing Methodologiesxi
Figure 32. Figure 5.13 from Part III of the 1993 AASHTO Guide Used to Determine Fjcu for Unbonded Overlays . . . . . . . . 33Figure 33. Screen Capture of AASHTOWare Pavement ME Design Properties Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35Figure 34. AASHTOWare Pavement ME Design Distress Prediction Summary for 9.0 in. Unbonded Overlay No Dowels 36Figure 35. AASHTOWare Pavement ME Design Predicted Faulting Plot for 9.0 in. Unbonded Overlay without Dowels . . 36Figure 36. AASHTOWare Pavement ME Design Predicted Cracking Plot for 9.0 in. Unbonded Overlay without Dowels . 36Figure 37. AASHTOWare Pavement ME Design Predicted IRI Plot for 9.0 in. Unbonded Overlay without Dowels . . . . . . 36Figure 38. AASHTOWare Pavement ME Design Distress Prediction Summary for 7.0 in. Unbonded Overlay withDowels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37Figure 39. Summary of Existing Pavement Cross-Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38Figure 40. Screen Capture of AASHTOWare Pavement ME Design JPCP Design Properties Menu . . . . . . . . . . . . . . . . . . . . 40Figure 41. AASHTOWare Pavement ME Design Distress Prediction Summary for 9 in. Unbonded Overlay with Dowels .41Figure 42. AASHTOWare Pavement ME Design Predicted Faulting Plot for 9 in. Unbonded Overlay with Dowels . . . . . . 41Figure 43. AASHTOWare Pavement ME Design Predicted Cracking Plot for 9 in. Unbonded Overlay with Dowels . . . . . 41Figure 44. AASHTOWare Pavement ME Design Predicted IRI Plot for 9 in. Unbonded Overlay with Dowels . . . . . . . . . . . 41Figure 45. AASHTOWare Pavement ME Design Distress Prediction Summary for 20-year Design Life and 8.5 in. Overlaywith Dowels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42Figure 46. AASHTOWare Pavement ME Design Distress Prediction Summary for 8.0 in. Overlay with Dowels and TiedPCC Shoulders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42Figure 47. Summary of Existing Pavement Cross-Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43Figure 48. Figure 5.13
AASHTO Guide for Design of Pavement Structures and/or computer software for the AASHTO Mechanistic-Empirical Pavement Design Guide and ACPA methods. 17. Key Words 18. Distribution Statement concrete pavement, concrete overlays, concrete overlay design methodologies No restr
