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Preparation and properties of modified magnesium oxysulfate cement derived from waste sulfuric acid
Wu, Chengyou1; Zhang, Huifang2; Yu, Hongfa1,3
2016
发表期刊ADVANCES IN CEMENT RESEARCH
卷号28期号:3页码:178-188
文章类型Article
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.
关键词Additives Compressive Strength Hydration
WOS标题词Science & Technology ; Technology
关键词[WOS]OXYCHLORIDE CEMENT ; DIFFUSION-DIALYSIS ; FLY-ASH ; RECOVERY ; PHOSPHATES ; EXCHANGE ; H2SO4 ; PHASE
收录类别SCI
语种英语
WOS研究方向Construction & Building Technology ; Materials Science
WOS类目Construction & Building Technology ; Materials Science, Multidisciplinary
WOS记录号WOS:000372441600005
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
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.
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