Effects of fly ash, phosphoric acid, and nano-silica on the properties of magnesium oxychloride cement

doi:10.1016/j.ceramint.2021.08.347

ISL OpenIR > 盐湖资源与化学实验室

	Effects of fly ash, phosphoric acid, and nano-silica on the properties of magnesium oxychloride cement
	Huang, Qing; Zheng, Weixin; Xiao, Xueying; Dong, Jinmei; Wen, Jing; Chang, Chenggong
第一作者	Huang, Qing
	2021-10
发表期刊	CERAMICS INTERNATIONAL
ISSN	0272-8842
卷号	47 期号:24 页码:34341-34351
摘要	This study investigates the effects of fly ash, phosphoric acid, nano-silica additives on the hydration process, setting time, compressive strength, water resistance, and thermal stability of magnesium oxychloride cement (MOC). MOC samples incorporating different combinations of additives are prepared, and their hydration products and microstructures are studied via X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), thermogravimetry-differential scanning calorimetry (TGA-DSC), and scanning electron microscopy (SEM). Results indicate that the addition of nano-silica to MOC containing fly ash and phosphoric acid reduces initial and final setting times, decreases the thermal stability, and increases compressive strength. Furthermore, the water resistance of modified MOC pastes is significantly improved through the combined use of additives. Hydration mechanisms arising in MOC are elucidated, and the remarkable enhancement of water resistance is attributed to secondary hydration of the 5 Mg(OH)(2)center dot MgCl(2 center dot)8H(2)O (5.1.8 phase) and the formation of amorphous gel facilitated by nano-silica inclusion.
DOI	10.1016/j.ceramint.2021.08.347
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/34385
专题	盐湖资源与化学实验室
推荐引用方式 GB/T 7714	Huang, Qing,Zheng, Weixin,Xiao, Xueying,et al. Effects of fly ash, phosphoric acid, and nano-silica on the properties of magnesium oxychloride cement[J]. CERAMICS INTERNATIONAL,2021,47(24):34341-34351.
APA	Huang, Qing,Zheng, Weixin,Xiao, Xueying,Dong, Jinmei,Wen, Jing,&Chang, Chenggong.(2021).Effects of fly ash, phosphoric acid, and nano-silica on the properties of magnesium oxychloride cement.CERAMICS INTERNATIONAL,47(24),34341-34351.
MLA	Huang, Qing,et al."Effects of fly ash, phosphoric acid, and nano-silica on the properties of magnesium oxychloride cement".CERAMICS INTERNATIONAL 47.24(2021):34341-34351.

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