- Author
-
Stutzman, P. E.
- Title
- X-Ray Powder Diffraction Analysis of Three Portland Cement Reference Material Clinkers.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
- Report
-
NISTIR 4785,
April 1992,
25 p.
- Distribution
- Available from National Technical Information Service
- Keywords
-
cements
|
x ray diffraction
|
microscopy
|
quantitative analysis
|
cement clinker
|
reference materials
- Abstract
- Three portland cement clinker Reference Materials (RMs) are now available from the National Institute of Standards and Technology (NIST). They are intended for use in testing and developing methods for quantiative phase abundance analysis and have been selected as representative of the range of compositions and textures of North American clinkers. Quantitative X-ray powder diffraction analysis was used to determine the phase abundance composition and compositional variability of eight randomly selected samples from each RM. In addition, each sample was split for duplicate analyses for evaluation of intra-sample phase abudance variability. The Reference Intensity Ratio method was used for powder diffraction calibrations and quantitative analysis. Both pure-phase standards and subsamples of the RM clinkers, which werepoint counted using the scanning electron microscope, were used for calibrations. Phase abundance values generally agree with those reported in earlier studies and the inter-sample standard deviation values were generally less than or equal to the intra-sample standard deviation values.