This item removes the d2s statement, which addresses the maximum difference expected between two duplicate test results. This statement can be added once an Interlaboratory Study (ILS) is completed. An ILS will provide a better indication of d2s because it will include a pooled estimate of standard deviation based on multiple operators. It will also include different levels of methylene blue value.
Keywordsclay ; ?fine aggregate; limestone filler; methylene blue; mineral filler;