Phase analysis of hydrated Portland cement

[摘要] The paper studies the quantitative phase composition in cement paste using the Rietveld refinement method. Investigations are carried out within 0-67 h time period at 40, 50 and 70 °C. It is found that tobermorite, deliate and mCanH2O10Si2 are major phases in cement phase, where m = 5 or 3, and n = 3 or 1. The phase composition is determined by the contribution from estimated peak intensities to the integrated peak intensity which, in turn, is compared to the experimental diffraction patterns. The volume fractions of the studied phases are measured. It is found that the time and temperature of isothermal curing significantly affect the structure of the cement paste.

[发布机构] Tomsk State University of Architecture and Building, Tomsk, Russia^1

[效力级别] 力学 [学科分类] 力学，机械学

[关键词] Cement paste;Peak intensity;Phase analysis;Rietveld refinement method;Time-periods;Tobermorite