QC/QA on Superpave Project in Utah

By Murari Man Pradhan, Ph.D., P.E.
Utah Department of Transportation

The Utah Department of Transportation has prepared a case study report on the analyzing a SHRP SUPERPAVE level one QC/QA project in Utah. It was observed that some of the construction control parameters are contradictory to each other, such as compaction and voids in mineral aggregate (VMA). While pay adjustment factors for compaction, asphalt cement content, and aggregate gradations were statistical based, the pay adjustment factor for VMA was not. Also, in combining these two, the effect of statistical-based specification was compromised. The purpose of statistical based QC/QA specification is to share the risk equally between the agency and the contractor. These concerns are addressed in this paper.

Technical questions pertaining to this study should be addressed to Dr. Murari Man Pradhan, at: Mpradhan@email.state.ut.us.

The University of Texas at Austin  •  UT's Cockrell School of Engineering