Effects of Material Ratio, Fly Ash, and Citric Acid on Magnesium Oxysulfate Cement
文献类型：期刊论文
| 作者 | Wu, Chengyou1; Yu, Hongfa2,3; Dong, Jinmei1; Zheng, Lina1 |
| 刊名 | ACI MATERIALS JOURNAL
 |
| 出版日期 | 2014-05-01 |
| 卷号 | 111期号:3页码:291-297 |
| 关键词 | Citric Acid Compressive Strength Fly Ash Magnesium Oxysulfate Cement Material Ratio |
| 文献子类 | Article |
| 英文摘要 | The effects of material ratio, fly ash, and citric acid on the compressive strength and phase composition of magnesium oxysulfate (MOS) cement have been studied. From these results, when the molar ratio of active MgO/MgSO4 increases from 3 to 5, the compressive strength of magnesium oxysulfate cement increases. When the molar ratio of active MgO/MgSO4 is 3, the main crystal phase contributing to the mechanical strength is 3Mg(OH)(2)center dot MgSO4 center dot 8H(2)O; when the molar ratio increases to 5, the main crystal phase is a new magnesium subsulfate that can be expressed as yMg(OH)(2)center dot MgSO4 center dot zH(2)O (Y phase). The compressive strength of MOS cement by adding fly ash decreases from 56.89 to 33.75 MPa (8.251 to 4.895 ksi) by 39.29% when the dosage of fly ash increases to 40%, because SiO2 in fly ash can form magnesium silicate hydrate gel, which can adsorb onto the surface of the Y phase nucleus and inhibit its growth. In the presence of 0.5% weight citric acid (CA), the compressive strength of MOS cement increases, because CA may facilitate the formation of yMg(OH)(2)center dot MgSO4 center dot zH(2)O (Y phase). |
| WOS关键词 | REFRACTORY CASTABLES ; OXYCHLORIDE CEMENT ; HYDRATION ; OXIDE |
| WOS研究方向 | Construction & Building Technology ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000336511000005 |
| 源URL | [http://ir.isl.ac.cn/handle/363002/5707]  |
| 专题 | 青海盐湖研究所_青海盐湖研究所知识仓储 中国科学院青海盐湖研究所 |
| 作者单位 | 1.Chinese Acad Sci, Qinghai Inst Salt Lake, Inorgan Mat Div, Xining, Peoples R China 2.Qinghai Univ, Civil Engn Coll, Xining, Peoples R China 3.Nanjing Univ Aeronaut & Astronaut, Nanjing, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Chengyou,Yu, Hongfa,Dong, Jinmei,et al. Effects of Material Ratio, Fly Ash, and Citric Acid on Magnesium Oxysulfate Cement[J]. ACI MATERIALS JOURNAL,2014,111(3):291-297. |
| APA | Wu, Chengyou,Yu, Hongfa,Dong, Jinmei,&Zheng, Lina.(2014).Effects of Material Ratio, Fly Ash, and Citric Acid on Magnesium Oxysulfate Cement.ACI MATERIALS JOURNAL,111(3),291-297. |
| MLA | Wu, Chengyou,et al."Effects of Material Ratio, Fly Ash, and Citric Acid on Magnesium Oxysulfate Cement".ACI MATERIALS JOURNAL 111.3(2014):291-297. |
入库方式： OAI收割
来源：青海盐湖研究所
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