ASTM RR:C09-1001 PDF Download

The ASTM RR:C09-1001 standard focuses on the precision and accuracy of testing methods for evaluating the pozzolanic activity of fly ash or natural pozzolans used in Portland-cement concrete. The standard describes the use of interlaboratory studies to estimate single-operator precision (within laboratory) and multilaboratory precision (between laboratories) for the proposed pozzolanic-activity-with-cement test.

The report discusses how the data used in the estimation of precision was derived from two interlaboratory studies, which were conducted in the currently proposed form of the testing method. It mentions that the first three studies were developmental and not suitable for precision estimates. The fourth and fifth studies, completed in 1987 and 1988 respectively, included different types of fly ash and pozzolans. The intention behind including an unclassified Class F fly ash in the study was to verify the sensitivity of the proposed method to materials known to perform poorly.

The standard emphasizes the importance of standardizing testing procedures to ensure reliable and accurate results. It references ASTM C 802-87 for data analysis and ASTM C 670-87 for preparation of the precision statement. The data analysis and precision estimation in accordance with these ASTM standards provide guidelines for evaluating the quality and performance of fly ash or natural pozzolans in Portland-cement concrete. The standard also mentions that the testing is conducted at different test ages, specifically 7 and 28 days, in both interlaboratory studies.