PRECISION ESTIMATES FOR AASHTO TEST METHOD T308 AND THE TEST METHODS FOR PERFORMANCE-GRADED ASPHALT BINDER IN AASHTO SPECIFICATION M320

摘要: This report includes the results of Phase 3 National Cooperative Highway Research Program (NCHRP) Project 9-26 where data from AASHTO Materials Reference Laboratory (AMRL) Proficiency Sample (PSP) are used to create or update precision estimates for a variety test methods. those specified in Standard Specification M320, "Performance-Graded Asphalt Binder," and Test Method T308, "Determining Binder content Hot-Mix (HMA) by Ignition Method." robust technique developed AMRL analyzing proficiency sample data. is four step methodology shaving off extraneous core paired set. The analysis "core data" can then be obtain reliable single-operator multilaboratory precision. In this study, over 91 sets comprised 28,000 were analyzed using developed. resulted statements eight separate order account changes resulting recent improvements methods, only most samples used.