Research Report RR:C01-1011
There are two objectives to this report:1. Examine the trends in precision of portland cement strength test results to determine whether there has been significant change over the 40+ year period represented by CCRL portland cement samples.2. Develop revised statistical parameters for 3- and 7-day test ages for portland cement testresults using more recent CCRL data, and develop new estimates of precision for 1- and 28-day test ages.
C109/C109M-13e1 Standard Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube Specimens)
Committee C01 on Cement
Subcommittee C01.27 on Strength