MgO-based supersulfated cement with different industrial by-product gypsum: Experiments and molecular dynamics simulation
文献类型：期刊论文
| 作者 | Li, Jiang-shan1,4,5; Zhang, Wei1,3; Huang, Xiao2; Lang, Lei1,4,5; Poon, Chi Sun5,6; Xue, Qiang1,4,5
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| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
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| 出版日期 | 2024-09-01 |
| 卷号 | 941页码:15 |
| 关键词 | MgO Ground granulated blast furnace slag Super sulfate cement Industrial by-product gypsum Unconfined compressive strength |
| ISSN号 | 0048-9697 |
| DOI | 10.1016/j.scitotenv.2024.173756 |
| 英文摘要 | Super sulfate cement (SSC) emerges as a sustainable alternative to ordinary Portland cement, boasting minimal carbon emissions and exceptional performance. As the quest for eco-friendly alternatives intensifies, there ' s a growing focus on exploring alkaline and sulfate activators conducive to SSC ' s environmental goals. This study delves into the viability of utilizing MgO as an alkaline activator in producing MgO-based supersulfated cement, while also investigating the impact of various industrial by-product gypsums on its performance. Findings reveal that employing MgO as an alkaline activator yields favorable hydration properties and mechanical strength in SSC. The optimized formulation comprises 15 % industrial by-product gypsum, 83 % granulated blast furnace slag (GGBFS), and 2 % MgO. Incorporating building gypsum and flue gas desulfurization (FGD) gypsum demonstrates superior unconfined compressive strength (UCS) growth compared to citric gypsum and phosphogypsum. Notably, gel -pores below 20 nm dominate the matrix, with variations in their distribution linked to the gypsum type used. The pH level and crystal structure of the industrial by-product gypsum emerge as pivotal factors dictating the hydration process. The interaction energy between hydrated building gypsum crystal planes and water molecules proves lower, contributing to the root cause of its high sulfate activating capability. Compared to traditional SSC, MgO-based supersulfated cement requires less alkaline activator content and accommodates more industrial by-product gypsums, thus reducing costs, CO 2 emissions, and promoting the efficient utilization of these solid wastes. |
| 资助项目 | National Natural Science Foundation of China[52370156] ; National Natural Science Foundation of China[42007260] ; National Key Research and Development Program[2019YFC1804002] ; China Postdoctoral Science Foundation[2022M723347] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001251753400001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/41770]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Huang, Xiao |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Guangxi Univ, Sch Resources Environm & Mat, State Key Lab Featured Met Mat & Life cycle Safety, MOE Key Lab New Proc Technol Nonferrous Met & Mat, Nanning 530004, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Hubei Prov Key Lab contaminated sludge & soil Sci, Wuhan 430071, Peoples R China 5.IRSM CAS HK PolyU Joint Lab Solid Waste Sci, Wuhan 430071, Peoples R China 6.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Kowloon, Hong Kong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Jiang-shan,Zhang, Wei,Huang, Xiao,et al. MgO-based supersulfated cement with different industrial by-product gypsum: Experiments and molecular dynamics simulation[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2024,941:15. |
| APA | Li, Jiang-shan,Zhang, Wei,Huang, Xiao,Lang, Lei,Poon, Chi Sun,&Xue, Qiang.(2024).MgO-based supersulfated cement with different industrial by-product gypsum: Experiments and molecular dynamics simulation.SCIENCE OF THE TOTAL ENVIRONMENT,941,15. |
| MLA | Li, Jiang-shan,et al."MgO-based supersulfated cement with different industrial by-product gypsum: Experiments and molecular dynamics simulation".SCIENCE OF THE TOTAL ENVIRONMENT 941(2024):15. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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