DataVXAdvances in Cement ResearchPaper
journal article·2021-09

The effect of nano-silica on the properties of magnesium oxychloride cement

Jing Wen, Weixin Zheng, Chenggong Chang, Pan Liu, Ying Li, Xueying Xiao, Qing Huang, Jinmei Dong

Advances in Cement Research· Volume 33· Issue 9
Publisher page
Source abstract

Abstract

As is well known, nano-particles have received particular attention in various application fields for fabricating materials with novel functionalities. This paper presents the effect of nano-silica on the properties of magnesium oxychloride cement (MOC), such as setting time, the hydration process, compressive strength, composition and microstructure of the paste. Results show that nano-silica can promote the hydration process and shorten the initial and final setting times of MOC, which were shortened by 14% and 8% when 5% nano-silica was incorporated in the MOC. In addition, nano-silica can increase the compressive strengths and make the pore structure of MOC denser. The compressive strengths at 3 days and 28 days increase by 29.5% and 18.0%, respectively, when 5% nano-silica is incorporated in MOC. Compared with the pure MOC paste, nano-silica yields no new hydration products in MOC besides P5 and magnesium hydroxide (Mg(OH)2). The higher compressive strength is mainly attributed to the water absorption and filling effect of nano-silica in MOC slurry.
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Research context

OpenAlex topics: Magnesium Oxide Properties and Applications · Concrete and Cement Materials Research · Recycling and utilization of industrial and municipal waste in materials production

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Associate Professor, Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, P. R. China; Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining, P. R. China

Associate researcher, Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, P. R. China

Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining, P. R. China

The Graduate University of Academy of Science, Beijing, P. R. China

Assistant researcher, Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, P. R. China

Graduate student, Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, P. R. China

Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining, P. R. China; The Graduate University of Academy of Science, Beijing, P. R. China

Associate Professor, Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, P. R. China

Professor, Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, P. R. China

Doctoral student, Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, P. R. China

Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining, P. R. China (corresponding author: )

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