Effect of Testing Factors on Rietveld Quantitative Analysis of Cement-Matrix Materials

Abstract:

For cement-matrix materials, the microstructure plays a vital important role in the research. Recently, quantitative phase analysis of cementitious materials can be performed using the Rietveld method by fitting the calculated X-ray diffraction (XRD) profile with the observed one. The aim of this paper is to further perform the quantitative analysis by the Rietveld method and discuss the influence of testing factors on the Rietveld quantitative phase analysis. The factors included the collection range of pattern, step size and the scan time of per step. In this study, the chemical composition of the samples was determined by X-ray fluorescence (XRF) spectrometry. And their phase composition was calculated by X-ray powder diffraction and Rietveld analysis. The results showed that the collection range of pattern depended on the tested materials , and the scanning range should include the main diffraction peak of the sample. Smaller step size and longer scan time of each step made the fitting factor smaller, also the calculated pattern coincided with the measured pattern, better enhance the precision of the analyses.

• Periodical: Materials Science Forum (Volume 898)
• Pages: 2054-2059
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.898.2054
• Online since: June 2017
• Authors: Yan Ling Gan, Su Ping Cui*, Ya Li Wang, Hong Xia Guo
• Keywords: Cement-Matrix Materials, Quantitative Phase Analysis, Rietveld Method, Testing Factors

References

[1] K.L. Scrivener, T. Fu llmann, E. Gallucci, G. Walent, E. Bermejo. Quantitative study of Portland cement hydration by X-ray diffraction /Rietveld analysis and independent methods, Cem. Concr. Res. 34 (2004) 1541-1547.

DOI: 10.1016/j.cemconres.2004.04.014

[2] R.H. Bogue. Calculation of the compounds in Portland cement, Ind. Eng. Chem. 1 (1929) 192–197.

[3] H.F.W. Taylor. Modification of the Bogue calculation, Adv. Cem. Res. 2 (1989) 73–77.

[4] D. Sorrentino, F. Sorrentino, E. Gartner. Prediction of a Portland cement's properties from its chemical and mineralogical composition, in: F. Young, J. Skalny (Eds. ), Materials Science of Concrete VII, The American Ceramic Society, (2005)1–35.

[5] Piqi Zhao, Xianping Liu, Ángeles G. De la Torre, Peiming Wang. Rietveld quantitative analysis of Portland cement by internal standard and Gfactor methods, Proceedings of the 14th International Congress on the Chemistry of Cement, (2010).

[6] P. Stutzman, S. Leigh. Phase analysis of hydraulic cements by X-ray powder diffraction: precision, bias, and qualification, J. ASTM Int. 4 (2007) 1–11.

DOI: 10.1520/jai101085

[7] L. León-Reina, A.G. de la Torre, J.M. Porras-Vásquez. Round robin on Rietveld quantitative phase analysis of Portland cements, J. Appl. Cryst. 42 (2009) 1–11.

DOI: 10.1107/s0021889809028374

[8] Jin yong, Sun xiaosong, Xue qi. X-ray Diffraction Analysis Technology. Defense industry press, beijing, (2008).

[9] Gwenn Le Saoût, Vanessa Kocab, Karen Scrivener. Application of the Rietveld method to the analysis of anhydrous cement, Cem. Concr. Res. 41 (2011) 133–148.

DOI: 10.1016/j.cemconres.2010.10.003

[10] L. P. Aldridge. Accuracy and precision of phase analysis in portland cement by bogue，microscopic and X-ray diffraction methods. Cement and Concrete Research, 12(1983): 381.

DOI: 10.1016/0008-8846(82)90087-4