Transcription of Chapter 4 Thickness Design - APAI
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Chapter 4 Thickness Design - APAI
Thickness Design4-1 Chapter 4 Thickness DesignGENERAL CONSIDERATIONSS everal procedures can be used to calculatethe Thickness of the proposed asphaltpavement. All are based on the volume andweight of the traffic that will use the facilityand on the load-supporting capability of theunderlying AASHTO Road Test and other studieshave indicated that heavy-vehicle wheel loadscause much greater damage to roads than dolight loads. Thus, where large volumes oftraffic with heavily loaded trucks are antici-pated, an in-depth analysis of the pavementthickness is important. Because all of thehigher functional classifications have thepotential for heavy loadings, a traffic analysisis an important part of the preparation forthickness computations.
Chapter 3. 2. Select a subgrade class (good, moderate, or poor) from Chapter 3 using soil data from the project. If no soil information is known, use the poor classification for the subgrade. 3. Select a design thickness from Tables 4-1 through 4-5 using the selected traffic class and subgrade class. Design Example
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