Study on the Effects of Molar Ratio of MgO and MgCl2 on the Properties of Magnesium Cement Straw Board Based on Experiment

Author:

Wang Xian Li1,Zhang Chun Yang1

Affiliation:

1. Beihua University

Abstract

Magnesium cement-based straw board is made of chloride-oxy-magnesium concrete as gel phase, a new building material with straw as reinforcing phase. The effects of molar ratio of MgO and MgCl2on the static bending strength, softening coefficient and start time back to halogen moisture absorption of magnesium cement-based straw board are analyzed in detail. The result showed that,when n(MgO)/n(MgCl2)=7(molar ratio),the mechanical properties and water resistance are the best, hydration products at this time is dominated by 518 phase.

Publisher

Trans Tech Publications, Ltd.

Reference9 articles.

1. Ceng Xiwen. Study on preparation and properties of magnesium concrete-based materials. Wuhan: Wuhan University of Technology, (2011).

2. C Mazuranic, H Bilinski, B Matkovic. Reaction products in the system MgCl2-NaOH-H2O. J Am Ceram Soc, 1982, 65(10): 523-526.

3. Bury C.R., Davies E.R.H. The system magnesium oxide-magnesium chloride-water. J. Chem. Soc. (London). 1932: 2008-(2015).

4. Sorel C.A., Armstrong C. Reaction and equilibria in chloride-oxy-magnesium concrete. J. Am. Ceram. Soc. 1976, 59(l2): 51-54.

5. Liu Qianqian, Yu Hongfa. Long term hydration products of chloride-oxy-magnesium concrete in natural environment and regular of phase transition. Study on Saline Lake, 2008, 16(4): 15-20.

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