- Author
-
Ferraris, C. F.
|
Hackley, V. A.
|
Aviles, A. I.
|
Buchanan, C. E., Jr.
- Title
- Analysis of the ASTM Round-Robin Test on Particle Size Distribution of Portland Cement: Phase 1.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
Roan Industries, Inc., Bakersville, NC
- Report
-
NISTIR 6883,
May 2002,
55 p.
- Distribution
- AVAILABLE FROM: National Technical Information Service (NTIS), Technology Administration, U.S. Department of Commerce, Springfield, VA 22161. Telephone: 1-800-553-6847 or 703-605-6000; Fax: 703-605-6900; Rush Service (Telephone Orders Only) 800-553-6847; Website: http://www.ntis.gov
- Keywords
-
cements
|
particle size
|
size distribution
|
particle size distribution
|
reference material
|
lasers
|
laser diffraction
- Identifiers
- description of methods used in the cement industry; analysis of data from the round-robin; comparison of the various methods used; Scanning Electron Microscope (SEM)
- Abstract
- Particle size distribution (PSD) is an essential property of cement. The only standard method to measure the PSD of cement, namely ASTM C115, is limited in scope; this standard describes a method for determining "fineness" with a lower size detection limit of 7.5 {mu}m. As there is no standard procedure covering the whole range of cement PSD, the implementation of different measurement methods varies widely within the industry. In general, the round-robin tests summarized here have demonstrated the high variability between participants using instruments based on the same underlying principles. ASTM committee C01.25.01 sponsored a round-robin test to measure the PSD of cement. The aim of this report is to analyze the data generated during those tests and to summarize the various approaches available to measure the PSD of cement. The analysis of the data is conducted in two parts. In the first part, an attempt is made to establish a reference distribution using a standard cement powder (SRM 114p). This is followed up by a comparison of the round-robin data in order to initiate discussion on developing a standard test method for cement PSD to be submitted for ASTM consideration. The report provides all the raw data collected during the round-robin tests, and the results of a statiscial analysis of the collected data.