Preparation and properties of modified magnesium oxysulfate cement derived from waste sulfuric acid

ISL OpenIR > 青海盐湖研究所知识仓储

	Preparation and properties of modified magnesium oxysulfate cement derived from waste sulfuric acid
	Wu, Chengyou 1; Zhang, Huifang2 ; Yu, Hongfa1,3
	2016
发表期刊	ADVANCES IN CEMENT RESEARCH
卷号	28 期号:3 页码:178-188
关键词	Additives Compressive Strength Hydration
摘要	High-strength modified magnesium oxysulfate cement is prepared using light-burned magnesia and industrial waste sulfuric acid resulting from titanium dioxide production. Amino trimethylene phosphonic acid (ATMP) is used as a modifier. Coal fly ash is added as a filler to the magnesium oxysulfate cement in order to further reduce its production cost. The compressive strength, setting time, phase compositions, micro-morphology and volume stability of the modified magnesium oxysulfate cement are comprehensively analysed. The results indicate that the compressive strength of the modified magnesium oxysulfate cement reaches 82.1 MPa when the molar ratio of the active magnesium oxide/sulfuric acid (MgO/H2SO4) (M) is 6, the water/cement ratio (R) is 0.6 and the ATMP and coal fly ash dosages are 0.2% and 50%, respectively. Low ATMP doses markedly affect the microstructure, hydration and shrinkage of the magnesium oxysulfate cement. X-ray diffraction, scanning electron microscopy and energy dispersive X-ray spectroscopy analyses prove that the needle-like magnesium hydroxide sulfate hydrate - 5Mg(OH)(2) center dot MgSO4 center dot 7H(2)O crystal (5.1.7 phase) - is the predominant strength phase in this cement system.
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/363002/6308
专题	青海盐湖研究所知识仓储盐湖资源综合利用工程技术中心盐湖资源与化学实验室
作者单位	1.Qinghai Univ, Xining, Peoples R China 2.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining, Peoples R China 3.Nanjing Univ Aeronaut & Astronaut, Dept Civil Engn, Nanjing, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Wu, Chengyou,Zhang, Huifang,Yu, Hongfa. Preparation and properties of modified magnesium oxysulfate cement derived from waste sulfuric acid[J]. ADVANCES IN CEMENT RESEARCH,2016,28(3):178-188.
APA	Wu, Chengyou,Zhang, Huifang,&Yu, Hongfa.(2016).Preparation and properties of modified magnesium oxysulfate cement derived from waste sulfuric acid.ADVANCES IN CEMENT RESEARCH,28(3),178-188.
MLA	Wu, Chengyou,et al."Preparation and properties of modified magnesium oxysulfate cement derived from waste sulfuric acid".ADVANCES IN CEMENT RESEARCH 28.3(2016):178-188.