THE EFFECT OF SILICA FUME ON THE DURABILITY OF MAGNESIUM OXYCHLORIDE CEMENT

Qing Huang; Jing Wen; Li  Ying; Zheng  Weixin; Chang  Chenggong; Dong  Jinmei; Man  Yangyang; Danchun; Zhou  AYuan 2; Xiao  Xueying

doi:10.13168/cs.2019.0029

Ceramics-Silikáty (Aug 2019)

THE EFFECT OF SILICA FUME ON THE DURABILITY OF MAGNESIUM OXYCHLORIDE CEMENT

Qing Huang,
Jing Wen,
Li Ying,
Zheng Weixin,
Chang Chenggong,
Dong Jinmei,
Man Yangyang,
Danchun,
Zhou AYuan 2,
Xiao Xueying

Affiliations

Qing Huang: Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, No. 18, Xinning Road, Xining 810008, P.R. China
Jing Wen: Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, No. 18, Xinning Road, Xining 810008, P.R. China
Li Ying: Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, No. 18, Xinning Road, Xining 810008, P.R. China
Zheng Weixin: Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, No. 18, Xinning Road, Xining 810008, P.R. China
Chang Chenggong: Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, No. 18, Xinning Road, Xining 810008, P.R. China
Dong Jinmei: Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, No. 18, Xinning Road, Xining 810008, P.R. China
Man Yangyang: Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, No. 18, Xinning Road, Xining 810008, P.R. China
Danchun: Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, No. 18, Xinning Road, Xining 810008, P.R. China
Zhou AYuan 2: Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, No. 18, Xinning Road, Xining 810008, P.R. China
Xiao Xueying: Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, No. 18, Xinning Road, Xining 810008, P.R. China

DOI: https://doi.org/10.13168/cs.2019.0029
Journal volume & issue: Vol. 63, no. 3
pp. 338 – 346

Abstract

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This paper investigated the water resistance of magnesium oxychloride cement (MOC) incorporating silica fume + phosphoric acid + nano-silica (SPN). Strength retention was tested to evaluate the water resistance of MOC. The characterisation of the hydration products and the microstructure of the typical samples before and after water immersion were carried out by using X-ray diffraction (XRD) and scanning electron microscope (SEM) facilities. The results show that incorporation of SPN significantly enhances the water resistance of MOC. The generation of an insoluble magnesium-chloride-silicate-hydrate gel and a magnesium-chloride-hydrate gel and the densification of the microstructure contribute to the remarkable improvement in the water resistance of MOC. Meanwhile, the pore structure results show that the total porosity and permeability of MOC has no direct relevant relationship on the improvement of the water resistance at the time of 28-day air curing.

Published in Ceramics-Silikáty

ISSN: 0862-5468 (Print); 1804-5847 (Online)
Publisher: University of Chemistry and Technology, Prague
Country of publisher: Czechia
LCC subjects: Technology: Chemical technology: Clay industries. Ceramics. Glass
Website: http://www.ceramics-silikaty.cz/

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