The Salt Attack Performance of Magnesium Oxychloride Cement Exposure to Three Kinds of Brines

Qing Huang; Ying Li; Chenggong Chang; Jing Wen; Jinmei Dong; Weixin Zheng; Danchun A; Pan Liu; Fei Dong; Yuan Zhou; Xueying Xiao

doi:10.1007/s11595-020-2239-z

Journal of Wuhan University of Technology Materials Science Edition ›› 2020, Vol. 35 ›› Issue (1) : 155 -166. DOI: 10.1007/s11595-020-2239-z

Cementitious Material

The Salt Attack Performance of Magnesium Oxychloride Cement Exposure to Three Kinds of Brines

Qing Huang ¹^,²^,³
, Ying Li ¹^,²
, Chenggong Chang ¹^,²
, Jing Wen ¹^,²
, Jinmei Dong ¹^,²
, Weixin Zheng ¹^,²^,³
, Danchun A ¹^,²^,³
, Pan Liu ¹^,²^,³
, Fei Dong ¹^,²^,³
, Yuan Zhou ¹^,²
, Xueying Xiao ¹^,²^,^{^m}

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Abstract

Salt attack performance of magnesium oxychloride cement (MOC) in brine was investigated from the viewpoints of strength development and strength coefficient. Microstructure was studied using quantitative X-ray diffraction (QXRD), thermogravimetry (TG) and scanning electron microscopy (SEM). The results show that MOC mortars have outstanding salt attack performance after aging brine and raw brine immersion. The salt attack coefficients of MOC mortars are higher than 0.8, which is qualified for application in saline soil and salt lake area. The reason is that salt brine solution enters into the voids of MOC and plays a role of toughening and strengthening in the MOC.

Keywords

magnesium oxychloride cement / salt attack performance / saline soil / salt lake area

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Qing Huang, Ying Li, Chenggong Chang, Jing Wen, Jinmei Dong, Weixin Zheng, Danchun A, Pan Liu, Fei Dong, Yuan Zhou, Xueying Xiao. The Salt Attack Performance of Magnesium Oxychloride Cement Exposure to Three Kinds of Brines. Journal of Wuhan University of Technology Materials Science Edition, 2020, 35(1): 155-166 DOI:10.1007/s11595-020-2239-z

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