Effects of Subsurface Drainage on Pavement Performance: Analysis of the SPS-1 and SPS-2 Field Sections (2007) / Chapter Skim
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1Background Subsurface drainage systems are commonly believed to be beneficial to the performance of both asphalt concrete (AC) and portland cement concrete (PCC)
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Under NCHRP Project 1-34B, completed in 1999, the Project 1-34 findings were reviewed, and a research plan was developed for further evaluating the effects of subsurface drainage on AC and PCC pavement performance, using data from the SPS-1 and SPS-2 experiments (12)
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This was perhaps unavoidable, but it complicates the analysis of the performance of the SPS-1 and SPS-2 test sections. The confounding of these two experimental factors makes it difficult to ascertain how much any differences in performance between drained and undrained test sections are due to the presence or absence of a functioning subdrainage system, versus differences in base stiffness.
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