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Texas perpetual pavements : new design guidelines.
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2010-06-01
[PDF-1.94 MB]
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Alternative Title:Project title: Monitor field performance of full-depth asphalt pavements to validate design procedures
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Abstract:Since 2001, the State of Texas has been designing and constructing perpetual pavements
on some of its heavily trafficked highways where the expected 20-year truck-traffic estimate of
18 kip ESALs is in excess of 30 million (TxDOT, 2001). To date, there are 10 in-service
perpetual pavement (PP) sections. Based on the TxDOT initial design proposals
(see Appendix A), a typical Texas PP structure consists of the following (TxDOT, 2001;
Walubita et al., 2009a):
-about 22 inches total thickness of hot-mix asphalt (HMA) layers;
-at least 8 inches thick treated (lime or cement) base material; and
-a well compacted in-situ subgrade soil material.
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