The effect of nano-silica on the properties of magnesium oxychloride cement-Reference-Cited by-同舟云学术

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

Published:2021-09 Issue:9 Volume:33 Page:413-422
ISSN:0951-7197
Container-title:Advances in Cement Research
language:en
Short-container-title:Advances in Cement Research

Author:

Wen Jing¹,Zheng Weixin²³⁴,Chang Chenggong⁵³,Liu Pan⁶⁷,Li Ying⁸³,Xiao Xueying⁹³,Huang Qing¹⁰³⁴,Dong Jinmei⁸¹¹

Affiliation:

1. 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

2. 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

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

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

5. 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

6. 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

7. 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

8. 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

9. 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

10. 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

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

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.

Publisher

Thomas Telford Ltd.

Subject

General Materials Science,Building and Construction

Link

https://www.icevirtuallibrary.com/doi/pdf/10.1680/jadcr.19.00122

Reference38 articles.

1. Nano-SiO2 contribution to mechanical, durability, fresh and microstructural characteristics of concrete: A review

2. The Formation of Magnesium Oxychloride Phases in the Systems MgO-MgCl2-H2O and NaOH-MgCl2-H2O

3. Microstructure of magnesium oxychloride cements