Quantitative Analysis of Cement-Based Materials and Sulfate Attack Products by XRD-Rietveld Analysis

Article Preview

Abstract:

XRD-Rietveld method has been adopted for quantitative analysis of phases in cement powder, phases in mixed samples of cement and pure calcium hydroxide, and sulfate attack products in cement pastes, based on the TOPAS software. The results show that, Rietveld analysis values show good agreement with the actual levels of mixed samples, and the accuracy degree of Rietveld method is at least as well as that of TG/DSC method which is commonly used in quantitative analysis of calcium hydroxide. By adding appropriate internal standard substance, XRD-Rietveld analysis method can be effectively used in quantitative analysis of sulfate attack products in cement-based materials. This work has practical significance on the study of sulfate attack of cement-based material.

You might also be interested in these eBooks

Info:

Periodical:

Pages:

1362-1369

Citation:

Online since:

August 2013

Export:

Price:

[1] H. Liu, C. Guo, X-ray polycrystalline diffraction full-pattern-fitting method and its applications in inorganic materials research, J. Inorg. Mater. 11(1996) 407-414. (in Chinese).

Google Scholar

[2] S. Diamond, The microstructure of cement paste and concrete–a visual primer, Cem. Concr. Compo. (26)(2004) 919–933.

DOI: 10.1016/j.cemconcomp.2004.02.028

Google Scholar

[3] K. L. Scrivener, Backscattered electron imaging of cementitious microstructures: understanding and quantification, Cem. Concr. Compo, (26)(2004) 935–945.

DOI: 10.1016/j.cemconcomp.2004.02.029

Google Scholar

[4] G. Walenta, T. Füllmann, M. Gimenez, Quantitative Rietveld analysis of cement and clinker, Int. Cem. Rev. (2001) 51–54.

Google Scholar

[5] T. Westphal, G. Walenta, T. Füllmann, et al, Quantitative Rietveld analysis of cement and clinker, Int. Cem. Rev. (2002) 47–51.

Google Scholar

[6] GB175-2007. Common Portland cement.

Google Scholar

[7] H. Li, W. Sun, X. Zuo, Study on sulfur distribution in cement-based materials subjected to external sulfate attack based on Mapping image analysis, J. Southeast Univ. (natural science edition), 42 (4)(2012) 766-772. (in Chinese).

Google Scholar

[8] E. F. Irassar, V. L. Bonavetti, M. González, Microstructural study of sulfate attack on ordinary and limestone Portland cements at ambient temperature, Cem. Concr. Res. 33 (2003) 31-41.

DOI: 10.1016/s0008-8846(02)00914-6

Google Scholar

[9] A. Gabrisova, J. Havlica, Stability of calcium sulphoaluminate hydrates in water solutions with various pH values, Cem. Concr. Res. 21 (6) (1991) 1023–1027.

DOI: 10.1016/0008-8846(91)90062-m

Google Scholar