Precision Statements for AASHTO Standard Methods of Test
Edward T. Harrigan
AASHTO Material Reference Laboratory
Work is in progress on Task Order #2.
The objective of this research is to develop or update precision and bias statements for AASHTO standard test methods.
Task Order #1 investigated specific sources of variability in AASHTO T 209, Theoretical Maximum Specific Gravity and Density of Hot Mix Asphalt (HMA), and quantified their effects on the precision of the method.
In Task Order #2, precision statements for eight AASHTO test methods are being updated through data mining and an interlaboratory study..