Precision Estimates for AASHTO Test Methods T 186, T 154, and T 22, Determined Using CCRL Proficiency Sample Data

The objective of this study was to update single-operator and multilaboratory precision estimates for the AASHTO T 186 “Early Stiffening of Hydraulic Cement (Paste Method)”, T 154 “Time of Setting of Hydraulic Cement Paste by Gillmore Needles”, and T 22 “Compressive Strength of Cylindrical Concrete Specimens” based on the most recent version of the test methods. This work was limited to an evaluation of 24 sets of data collected from laboratories participating in the physical analysis of hydraulic cement paste and compressive properties of hydraulic cement concrete of the Cement and Concrete Reference Laboratory (CCRL) Proficiency Sample Program. The data used reflect a wide range of test values and cement types, which are included in the scope of the CCRL Proficiency Sample Program.


  • English

Media Info

  • Media Type: Web
  • Edition: Contractor Final Report
  • Features: Appendices; References; Tables;
  • Pagination: 48p
  • Serial:
  • Publication flags:

    Open Access (libre)

Subject/Index Terms

Filing Info

  • Accession Number: 01139515
  • Record Type: Publication
  • ISBN: 9780309435819
  • Report/Paper Numbers: NCHRP Project 09-26A
  • Files: TRIS, TRB, ATRI
  • Created Date: Sep 14 2009 4:36PM