Consideration of Preservation in Pavement Design and Analysis Procedures (2015) / Chapter Skim
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From page 10... ...
10 C H A P T E R 3 LTPP Test Sections Because of the age of the LTPP and other test sections used in the development and calibration of the MEPDG performance prediction models, it has been suggested that preservation treatments may have been applied to these sections such that the developed models already reflect the effects of preservation. To determine whether preservation treatments were indeed applied to these sections and if their effects were accounted for in the performance data, the development of MEPDG prediction models for (a)
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11 (a few instances of diamond grinding and grooving were also recorded in the LTPP database)
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12 models. Availability of data to support the development of these approaches is described in the following sections.
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13 MEPDG Performance Model Number of Test Sections Percent Test Sections with Preservation Effects Considered in Performance Data Preservation Effects Considered in Performance Data Preservation Effects Not Considered in Performance Data Effects Unknown Total FLEXIBLE PAVEMENTS Fatigue Cracking1 Model -- New/ Reconstructed Flexible Pavements 20 63 12 95 21 Fatigue Cracking1 Model -- HMA Overlays over Flexible Pavements 1 45 0 46 2 Fatigue Cracking1 Model -- HMA Overlays over Fractured Slab Pavements 2 1 0 3 67 Fatigue Cracking1 Model -- HMA Overlays over JPC Pavements 5 7 0 12 42 Thermal Cracking Model -- New/ Reconstructed Flexible Pavements N/A N/A N/A N/A N/A Rutting Model -- New/Reconstructed Flexible Pavements 14 74 7 95 15 Rutting Model -- HMA Overlays over Flexible Pavements 21 25 0 46 46 Rutting Model -- HMA Overlays over Fractured Slab Pavements 2 1 0 3 67 Rutting Model -- HMA Overlays over JPC Pavements 4 3 0 7 57 Smoothness Model -- New/ Reconstructed Flexible Pavements and HMA Overlays N/A N/A N/A N/A N/A RIGID PAVEMENTS Punchout Model -- New/Reconstructed CRC 10 31 2 43 23 Transverse Joint Faulting Model -- New/Reconstructed JPC 10 122 15 147 7 Transverse Cracking Model -- New/Reconstructed JPC 12 123 12 147 8 Transverse Joint Faulting and Cracking Models -- Restored JPC N/A N/A N/A N/A N/A Transverse Joint Faulting and Cracking Models -- Unbonded JPC Overlays N/A N/A N/A N/A N/A Punchout Model -- Unbonded CRC Overlays N/A N/A N/A N/A N/A Punchout Model -- Bonded PCC Overlay over CRC N/A N/A N/A N/A N/A Smoothness Model -- New/ Reconstructed JPC 7 68 3 78 9 Smoothness Model -- New/ Reconstructed CRC 3 41 1 45 7 Notes: 1 Bottom-up alligator and top-down longitudinal cracking. N/A = not available.
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From page 14... ...
14 input data required for this analysis, such as design properties and analysis parameters, traffic and climate characteristics, structure properties, material layer properties, and foundation and bedrock properties, must be established. A complete listing of required inputs is available in several sources (AASHTO 2008, the AASHTOWare Pavement ME Design software and Software Help System, and FHWA 2010)
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From page 15... ...
15 Table 5. Data elements required for AASHTOWare Pavement ME Design analysis.
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