The hydration mechanism and performance of Modified magnesium oxysulfate cement by tartaric acid

doi:10.1016/j.conbuildmat.2017.03.222

ISL OpenIR > 青海盐湖研究所知识仓储

	The hydration mechanism and performance of Modified magnesium oxysulfate cement by tartaric acid
	Wu, Chengyou; Chen, Wenhai; Zhang, Huifang; Yu, Hongfa; Zhang, Wuyu; Jiang, Ningshan; Liu, Lianxin
第一作者	Wu, Chengyou
	2017-07-30
发表期刊	CONSTRUCTION AND BUILDING MATERIALS
ISSN	0950-0618
卷号	144 页码:516-524
关键词	Magnesium Oxysulfate Cement Tartaric Acid Setting Time Compressive Strength 5mg(Oh)(2)Center Dot Mgso4 Center Dot 7h(2)o
摘要	Magnesium oxysulfate (MOS) cement has the advantages of light weight, low alkalinity, fire resistance, and good decorative value. Large-scale applications of MOS cement in civil engineering have been restricted by its low strength, which can be improved by adding some proper additives. Here, the effects of tartaric acid on the setting time, compressive strength, flexural strength, and deformation of MOS cement have been studied. Fourier transform infrared spectra, pH changes, hydration-heat release rate, and impedance have been observed to determine the effects of tartaric acid on the hydration process of MOS cement. To a certain extent, the addition of tartaric acid extends the setting time of MOS cement by improving the stability of the hydration film of active MgO in magnesium sulfate. X-ray diffraction, scanning electron microscopy, and mercury intrusion porosimetry were used to examine the hydration products and pore-size distribution of MOS cement. The analysis results indicate that the main reason for the high strength of MOS cement with tartaric acid is that the addition of tartaric acid can promote the formation of the needle-like high-strength phase of 5Mg(OH)(2)center dot MgSO4 center dot 7H(2)O and inhibit the formation and growth of the Mg(OH)(2) crystal phase. (C) 2017 Elsevier Ltd. All rights reserved.
DOI	10.1016/j.conbuildmat.2017.03.222
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/4248
专题	青海盐湖研究所知识仓储中国科学院青海盐湖研究所盐湖资源与化学实验室
推荐引用方式 GB/T 7714	Wu, Chengyou,Chen, Wenhai,Zhang, Huifang,et al. The hydration mechanism and performance of Modified magnesium oxysulfate cement by tartaric acid[J]. CONSTRUCTION AND BUILDING MATERIALS,2017,144:516-524.
APA	Wu, Chengyou.,Chen, Wenhai.,Zhang, Huifang.,Yu, Hongfa.,Zhang, Wuyu.,...&Liu, Lianxin.(2017).The hydration mechanism and performance of Modified magnesium oxysulfate cement by tartaric acid.CONSTRUCTION AND BUILDING MATERIALS,144,516-524.
MLA	Wu, Chengyou,et al."The hydration mechanism and performance of Modified magnesium oxysulfate cement by tartaric acid".CONSTRUCTION AND BUILDING MATERIALS 144(2017):516-524.

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