ASTM C917/C917M-18 PDF Download

ASTM C917/C917M-18 is a standard test method that provides information on the variability of strength of cement from a single source over a period of time. It can be applied to hydraulic cements covered in Specifications C150, C595, and C1157. The results obtained from this test method are intended for informational purposes only and are not requirements of any existing ASTM specification. However, a specification may refer to this test method to obtain information on the variability of cement from a single source.

The procedure for this test method involves obtaining samples from various locations during the delivery of cement to the user. This method is more representative of the variability of cement used in concrete production compared to test data reported on mill test reports. The variation determined from the test results is adjusted for testing error, providing the user with an indicator of the source variation of the cement.

It is important to note that concrete strength variability is influenced by factors other than just cement strength variability. Therefore, this test method does not provide information on the relationship between the variability of cement and the variability of concrete properties. The user can utilize supplementary information or perform correlative testing of concrete properties to develop quantitative estimates of the effects.