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Appl. Sci. 2015, 5(4), 989-997; doi:10.3390/app5040989

Study on Sintering System of Calcium Barium Sulphoaluminate by XRD Quantitative Analysis

School of Civil Engineering, Dalian University of Technology, Dalian 116024, China
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Author to whom correspondence should be addressed.
Academic Editor: Wen-Hsiang Hsieh
Received: 18 August 2015 / Revised: 11 October 2015 / Accepted: 20 October 2015 / Published: 2 November 2015
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Abstract

Calcium barium sulphoaluminate (CBSA), derived from calcium sulphoaluminate (CSA), has excellent cementitious properties. In this study, the sintering system of CBSA with a theoretical stoichiometric Ca3BaAl6SO16 was investigated. Rietveld refinement was performed using TOPAS 4.2 software to quantitatively calculate the content of CBSA and the actual ionic site occupancy of Ba2+. The results indicate that the content of Ca4−xBaxAl6SO16 increases with increasing sintering temperature in the 1200–1400 °C ranges. When sintered at 1400 °C for 180 min, the content of CBSA reaches 88.4%. However, CBSA begins to decompose at 1440 °C, after which the content decreases. The replacement rate of Ba2+ was also enlarged by increasing sintering temperature and prolonged sintering time. Sintering at 1400 °C for 180 min is considered as the optimum when replacement rate of Ba2+ and the content of CBSA were taken into account. Ca3.2Ba0.8Al6SO16 with a content of 88.4% was synthesized. View Full-Text
Keywords: calcium barium sulphoaluminate; sintering system; Ba2+ replacement rate; Rietveld refinement calcium barium sulphoaluminate; sintering system; Ba2+ replacement rate; Rietveld refinement
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MDPI and ACS Style

Chang, J.; Shang, X.; Zhao, J. Study on Sintering System of Calcium Barium Sulphoaluminate by XRD Quantitative Analysis. Appl. Sci. 2015, 5, 989-997.

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