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Certification of SRM 114q: Part I



Chiara F. Ferraris, William F. Guthrie, A Aviles, Robin K. Haupt, Bruce S. MacDonald


The standard reference material (SRM) for fineness of cement, SRM 114, is an integral part of the calibration material routinely used in the cement industry to qualify cements. Being a powder, the main physical properties of cement, prior to hydration, are its surface area and particle size distribution (PSD). Since 1934, NIST has provided SRM 114 for cement fineness and it will continue to do so as long as the industry requires it. Different lots of SRM 114 are designated by a unique letter suffix to the SRM number, e.g., 114a, 114b, . ,114q. A certificate that gives the values obtained using ASTM C204 (Blaine), C115 (Wagner) and C430 (45-mm sieve residue) is included with each lot of the material. The supply of SRM 114p, which was released in 1994, was depleted in 2004. Therefore, a new batch of SRM 114 needed to be developed. This process included selection of the cement, packaging the cement in small vials, and determination of the values for the ASTM tests reported. In this case, the Blaine, Wagner and 45-mm sieve residue were the tests used. Later the particle size distribution (PSD) will be added. The purpose of this report is to provide a detailed description of the process used to package and certify SRM 114q. All measurements used for the certifications are provided along with descriptions of the statistical analyses.
Special Publication (NIST SP) - 260-161
Report Number


Blaine, fineness of cement, residue, Standard Reference Material 114, Wagner


Ferraris, C. , Guthrie, W. , Aviles, A. , Haupt, R. and MacDonald, B. (2006), Certification of SRM 114q: Part I, Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD, [online], (Accessed April 20, 2024)
Created June 14, 2006, Updated November 10, 2018