The objective of this study was to revise AASHTO PP 74 to be applicable for use with optical computerized particle analyzers entered into the market since the development of the test method in 2011. The precision estimates of the test were updated by including the measurements made with the new equipment. The project final report was submitted to the AASHTO Subcommittee on Materials for review and possible action. Click on the following link to access the project final report:
