Surface chemical properties of coral powder and its effect on hydration and pore structure of cement slurry
文献类型：期刊论文
| 作者 | Qin, Qinglong1,3; Meng, Qingshan1; Li, Wenwei2; Yang, Huamei2; Wei, Houzhen1; Wu, Kai1,3; Wang, Chi1,3 |
| 刊名 | THERMOCHIMICA ACTA
 |
| 出版日期 | 2022-11-01 |
| 卷号 | 717期号:-页码:- |
| 关键词 | Coral powder Hydration mechanisms Hydration kinetics |
| ISSN号 | 0040-6031 |
| 英文摘要 | Coral powder as a mineral admixture to replace part of the cement can not only greatly reduce the construction cost of coral islands and reefs, but also reduce the carbon dioxide produced by cement production and trans-portation. The role of coral powder in cement system and the effects of coral powder on hydration mechanisms and properties of cement slurry are revealed at macro, micro and nano scale. The results show that the hydration kinetics of coral powder-cement slurries can be divided into three phases: nucleation and crystal growth (NG), phase boundary reaction (I), and diffusion (D). Compared with coarse coral powder, fine coral powder has stronger chemisorption of Ca2+ in solution, which accelerates the early hydration of coral powder-cement slurries and advances the time of acceleration period. Moreover, coral powder promotes nucleation formation and growth by chemisorption of Ca2+, which results in more hydrated calcium silicate(C-S-H) and calcium hy-droxide (CH) generation. Meanwhile, the positively charged coral powder repels with the positively charged cement, thus improving the fluidity of mortar. The reaction degree of coral powder with C3A is low, however, coral powder effectively inhibits the conversion of ettringite (AFt) to monosulfate (AFm). |
| 学科主题 | Thermodynamics ; Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000875507100006 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35116]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China 2.Hydraulic Concrete Institute, China Three Gorges Corporation, Beijing 100038, China 3.University of Chinese Academy of Sciences, Beijing 100049, China |
| 推荐引用方式 GB/T 7714 | Qin, Qinglong,Meng, Qingshan,Li, Wenwei,et al. Surface chemical properties of coral powder and its effect on hydration and pore structure of cement slurry[J]. THERMOCHIMICA ACTA,2022,717(-):-. |
| APA | Qin, Qinglong.,Meng, Qingshan.,Li, Wenwei.,Yang, Huamei.,Wei, Houzhen.,...&Wang, Chi.(2022).Surface chemical properties of coral powder and its effect on hydration and pore structure of cement slurry.THERMOCHIMICA ACTA,717(-),-. |
| MLA | Qin, Qinglong,et al."Surface chemical properties of coral powder and its effect on hydration and pore structure of cement slurry".THERMOCHIMICA ACTA 717.-(2022):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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