Effect of calcium to silica ratio on the synthesis of calcium silicate hydrate in high alkaline desilication solution
文献类型：期刊论文
| 作者 | Qi, Fang3; Zhu, Ganyu1; Zhang, Yimin3; Hou, Xinjuan1,2; Li, Shaopeng1; Zhang, Jianbo1; Li, Huiquan1,2 |
| 刊名 | JOURNAL OF THE AMERICAN CERAMIC SOCIETY
 |
| 出版日期 | 2020-09-09 |
| 页码 | 13 |
| 关键词 | calcium silicate hydrate fly ash high-alkaline solution structure |
| ISSN号 | 0002-7820 |
| DOI | 10.1111/jace.17440 |
| 英文摘要 | High alkaline desilication solution (DSS), a high volume byproduct from the pretreatment of high-alumina fly ash, was used as low-cost mother liquor for the synthesis of calcium silicate hydrate (C-S-H). Through the combined analysis of X-ray diffraction, thermogravimetric analysis, X-ray fluorescence,Si-29 MAS NMR, and Brunauer-Emmett-Teller, the relationship between chemical composition and structure of C-S-H synthesized under Ca/Si of 0.83:1 to 2.0:1 was investigated. Silicon conversion and yield of product have a positive correlation with Ca/Si. Sodium uptake in C-S-H is inhibited as Ca/Si increases. The formation of sodium in C-S-H transfers from "bound Na" to "mobile Na" and aluminum from tetrahedrally coordinated Al (IV) to octahedrally coordinated Al (VI). The increase of Ca/Si leads to shortening of silicate chain and formation of more dimers, which causes more water bound in C-S-H. The mechanism of calcium addition on silicate chain obtained from DFT calculation primarily results from more interlayer calcium occurrence to affect bridging tetrahedron and cationic bounding states reorganization. Reasonable control for Ca/Si momentously contributes to the adjustment for composition and structure of C-S-H synthesized in DSS. |
| WOS关键词 | C-S-H ; X-RAY ; ALUMINUM ; MECHANISM ; AL-27 |
| 资助项目 | Projects of National Natural Science Foundation of China[51704272] ; Projects of National Natural Science Foundation of China[U1810205] ; Projects of National Natural Science Foundation of China[51804293] ; Youth Innovation Promotion Association CAS[2018066] |
| WOS研究方向 | Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000567633200001 |
| 出版者 | WILEY |
| 资助机构 | Projects of National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/42053]  |
| 专题 | 中国科学院过程工程研究所 |
| 通讯作者 | Zhu, Ganyu; Zhang, Yimin; Li, Shaopeng |
| 作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Wuhan Univ Sci & Technol, Coll Resources & Environm Engn, State Environm Protect Key Lab Mineral Met Resour, Wuhan 430081, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qi, Fang,Zhu, Ganyu,Zhang, Yimin,et al. Effect of calcium to silica ratio on the synthesis of calcium silicate hydrate in high alkaline desilication solution[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY,2020:13. |
| APA | Qi, Fang.,Zhu, Ganyu.,Zhang, Yimin.,Hou, Xinjuan.,Li, Shaopeng.,...&Li, Huiquan.(2020).Effect of calcium to silica ratio on the synthesis of calcium silicate hydrate in high alkaline desilication solution.JOURNAL OF THE AMERICAN CERAMIC SOCIETY,13. |
| MLA | Qi, Fang,et al."Effect of calcium to silica ratio on the synthesis of calcium silicate hydrate in high alkaline desilication solution".JOURNAL OF THE AMERICAN CERAMIC SOCIETY (2020):13. |
入库方式： OAI收割
来源：过程工程研究所
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