Effects of Subsurface Drainage on Performance of Asphalt and Concrete Pavements (2003) / Chapter Skim
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Pages 48-50
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48 CHAPTER 4 CONCLUSIONS AND RECOMMENDATIONS CONCLUSIONS In this study, the potential effects of subsurface drainage on the performance of asphalt and concrete pavements in the SPS-1 and SPS-2 experiments were assessed using available data on IRI for both pavement types, as well as rutting and alligator/longitudinal cracking for asphalt pavements, and faulting, transverse cracking, and longitudinal cracking for concrete pavements. The results of the preliminary analyses conducted in this study suggest that the SPS-1 and SPS-2 experiments are beginning to manifest differences in some measures of performance that are related to the base type/subdrainage experimental design factor.
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49 dense-graded asphalt-treated base (ATB) may develop roughness and cracking more slowly than drained permeable asphalttreated base over aggregate subbase (PATB/AGG)
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50 Subdrains were not located and inspected in 24 percent (26 of 108) of the SPS-1 test sections designed to be drained nor in 14 percent (8 of 56)
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