Precision Estimates for AASHTO Test Method T308 and the Test Methods for Performance-Graded Asphalt Binder in AASHTO Specification M320 (2005) / Chapter Skim
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1 CHAPTER 1: INTRODUCTION AND RESEARCH APPROACH 1.1 INTRODUCTION Under National Cooperative Highway Research Programs (NCHRP) Project 9-26, the AASHTO Materials Reference Laboratory (AMRL)
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2 1.1.1 PROBLEM STATEMENT AASHTO Standard Test Methods applicable to highway materials require periodic studies to determine estimates of precision. Some precision estimates become outdated as a result of improvements in the methods while other estimates need to be verified to see if they are still accurate.
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3 1.3 PROFICIENCY SAMPLES USED IN STUDY Included in the study are the most recent AMRL proficiency samples that include the test methods covered in the Research Objectives (Section 1.1.2)
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