Impact of Asphalt Thickness on Pavement Quality (2019) / Chapter Skim
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60 A P P E N D I X A State Survey Questionnaire Synthesis 49-05 Impact of Asphalt Lift Thickness The Transportation Research Board is preparing a synthesis on the Impact of Asphalt Materials Lift Thickness on Pavement Quality. This survey is part of the information gathering on that topic.
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State Survey Questionnaire 61 1. Does your organization have established policies or guidelines regarding appropriate asphalt lift thicknesses relative to the nominal maximum aggregate size (NMAS)
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62 Impact of Asphalt Thickness on Pavement Quality 3. Do you specify different maximum lift thicknesses depending on mixture size and/or type?
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State Survey Questionnaire 63 8. Have you observed paving contractors having more difficulty in obtaining required field densities since implementing the Superpave mix design system?
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64 Impact of Asphalt Thickness on Pavement Quality 9. Has your agency changed recommended or required lift thicknesses since implementing the Superpave mix design system?
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State Survey Questionnaire 65 11. Have you observed contractors having increased difficulty obtaining adequate density in mixtures with certain components or in certain applications?
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66 Impact of Asphalt Thickness on Pavement Quality 15. Do you see a need for additional research into any of the following?
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