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Aggregate Image Measurement System 2 (AIMS2): Final Report


Detailed material testing procedures were developed as a part of this project. These procedures were followed by the ILS participants. Although the participating laboratories did not sample or prepare the materials used in the study, TAMU followed the sample preparation procedures for the ILS materials used in this study. The procedures developed outline the required steps for aggregate material shape characterization and are written in a standards format appropriate for AASHTO. As such, two proposed test method procedures were drafted and submitted to AASHTO for consideration. The preliminary AASHTO Technical Group review produced several suggestions for improving and clarifying the procedure documents. The draft procedures were modified per those recommendations and resubmitted for further consideration. AASHTO subsequently approved these procedures with minor changes as provisional standards, and they were published in AASHTO Provisional Standards, 2010 edition.5

  • AASHTO TP81-10, "Standard Method of Test for Determining Aggregate Shape Properties by Means of Digital Image Analysis."
  • AASHTO PP64-10, "Standard Method for Determining Aggregate Source Shape Values from Digital Image Analysis Shape Properties."

Precision and bias information (table 3) has been added through the AASHTO Subcommittee on Materials 2010 ballot and will be published in the 2011 edition of the Standards. A detailed discussion of the analyses undertaken are included in appendix A, chapter 3.

5 Standard Specifications for Transportation Materials and Methods of Sampling and Testing, 30th Edition and AASHTO Provisional Standards, 2010 Edition, 2010, American Association of State Highway and Transportation Officials, Washington, DC.

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