Date of Graduation
Statler College of Engineering and Mineral Resources
Civil and Environmental Engineering
John P. Zaniewski.
Statistical quality control measures, such as used by the West Virginia Division of Highways (WVDOH), require quantification of the variability of the test methods to set meaningful material acceptance parameters. The Division currently uses the Marshall method for asphalt concrete mix design and quality control. Although the Marshall method will be replaced as the Division transitions to the Superpave method, in the interim, the Division will continue to use the Marshall method. The objective of this project was to determine multi-laboratory precision statements for the Marshall method that the WVDOH can use in developing statistically based quality acceptance specifications.;An experiment was designed to generate the data needed for the development of precision statements for the Marshall method. An inter-laboratory study was performed in accordance with ASTM standards to evaluate the multi-laboratory variability of test methods. The experiment included three WVDOH asphalt concrete types. A side issue evaluated during this project was mixing of large quantities of material needed for the 152mm Marshall samples and for Superpave. A five gallon bucket style mixer was evaluated, and operating procedures were established. (Abstract shortened by UMI.).
Hughes, Michael S., "Inter-laboratory variability of the Marshall test method for asphalt concrete" (1999). Graduate Theses, Dissertations, and Problem Reports. 947.