Modification Research on the Water-Resistance of Magnesium Oxychloride Cement

Abstract:

The influences of fly ash and phosphoric acid on water-resistant property and the microstructure of magnesium oxychloride cement (MOC) were investigated in this paper. It is found that the improvement of the water-resistance of the MOC incorporated with phosphoric acid can be attributed to the dramatic decrease in the quantity of crystallization points. In addition, the new Mg₂PO₄(OH) phase can also prevent the dissolution of 5-phase. And the mechanism of the water-resistance of the MOC mixed with fly ash is due to the Ca₂MgSi₂O₇ phase and the glass phase which are filled into microscopic cracks and skeleton empty.

• Periodical: Applied Mechanics and Materials (Volumes 423-426)
• Pages: 1027-1030
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.423-426.1027
• Online since: September 2013
• Authors: Zi Yao Yuan, Xing Long Liu, Yong Feng Jia, Peng Liu, Ming Chun Li
• Keywords: Magnesium Oxychloride Cement, Microstructure, Modifier, Water-Resistance

References

[1] S Sorel: France, Vol 65 (1867), p.102.

[2] Cui Chong, Ma Baoguo, Cui Kehou and Suen Wenghua: Journal of Wuhan University of Technology, Vol 16 (1994), p.37.

[3] Zhang Chuanmei and Deng Dehua: Journal of Wuhan University of Technology, Vol 9 (1994), p.51.

[4] Misra AK and Mathur R: Bull. Mater. Sci., Vol 30 (2007), p.239.

[5] Zhang Chuanmei and Deng Dehua: Cement and Concrete Research, Vol 29 (1999), p.1365.

[6] Z Chuanmei and D Dehua: Journal of the Chinese Ceramic Society, Vol 23 (1995), p.673.

[7] D Dehua: Cement and Concrete Research, Vol33(2003), p.1311.

[8] Sorell C A and Armstrong C R: Journal of the American Ceramic Society, Vol 59 (1976), p.51.

[9] Ji Baoqing and Xia Shuping: Chinese Journal of Applied Chemistry, Vol 12 (1995), p.43.

[10] C. K. Chau and Zongjin Li: Materials and Structures, Vol 41(2008), p.853.

[11] L Zhiguang: Shandong Coal Science and Technology, Vol 44(2007), p.70.