Precision Estimates for AASHTO Test Method T 105, Determined Using CCRL Proficiency Sample Data (2009) / Chapter Skim
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NCHRP Web-Only Document 139: Precision Estimates for AASHTO Test Method T 105 1 CHAPTER 1. INTRODUCTION AND RESEARCH APPROACH 1.1 INTRODUCTION Under National Cooperative Highway Research Programs (NCHRP)
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NCHRP Web-Only Document 139: Precision Estimates for AASHTO Test Method T 105 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 Some precision estimates become outdated as a result of improvements in the methods while other estimates need to be verified to see if they are still accurate.
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NCHRP Web-Only Document 139: Precision Estimates for AASHTO Test Method T 105 3 Table 1-1- Sample Designation and Date of Final Report of Proficiency Samples Sample Designation Cement Type Date of Final Report 147 & 148 Type I/II March-03 149 & 150 Type I September-03 151 & 152 Type I April-04 153 & 154 Type I October-04 155 & 156 Type I April -05 157 & 158 Type V w/ limestone (157) & Type I/II w/ limestone (158)
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