Strength and microstructure properties of solidified sewage sludge with two types of cement-based binders
文献类型：期刊论文
| 作者 | Chen, Yijun1,2,3,5; He, Xingxing2,4; Zhang, Shaohua3; Tan, Xun2,4; Wan, Yong1,2,5 |
| 刊名 | SCIENTIFIC REPORTS
 |
| 出版日期 | 2020-12-27 |
| 卷号 | 10期号:1页码:12 |
| ISSN号 | 2045-2322 |
| DOI | 10.1038/s41598-020-77701-y |
| 英文摘要 | Solidification treatment with cementitious binder is an effective way to reduce environmental hazards of sewage sludge. Two cementitious binders, i.e., ordinary Portland cement (OPC) and sulfo-aluminate cement (SAC), were compared in this study to treat the sewage sludge. The strength of solidified sewage sludge (SSS) and changes in microscopic characteristics before and after treatment were analyzed through microscopic analysis methods. The effect of organic matter in sludge on the strength of SSS were also discussed. The results showed that the strength of SSS were lower than that of the solidified clay with no organic matter, and the filtrate extracted from the sludge can also weaken the cementation of the two cements significantly. The solidification effect of the OPC on the sludge was lower than that of the SAC evidently. The organic matter in the sewage sludge caused the surface of the soil particles to carry a large negative potential, which interfered with the hydration of the binder and reduced the amount of cementation skeleton formed by the binder hydration products. This resulted in a porous structure with low mechanical strength. The amount of early hydration product formed in the SAC-based solidified samples was higher than that of the OPC-based samples. This was favorable for filling the pores of the solidified samples and increasing their density. SAC had a better compatibility with soft soil containing high organic matter than OPC, and the which provides an effective alternative binder for dealing with sewage sludge. |
| 资助项目 | National Science Foundation for Distinguished Young Scholars[51625903] ; National Natural Science Foundation of China/Hong Kong Research Grants Council Joint Research Scheme[51861165104] ; Youth Innovation Promotion Association CAS[2017376] |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| 出版者 | NATURE RESEARCH |
| WOS记录号 | WOS:000596311200001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/25231]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Hubei Key Lab Contaminated Clay Sci & Engn, Wuhan 430071, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China 3.Wuhan CAS ITRI Solid Waste Resources Co Ltd, Wuhan 430014, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.IRSM CAS HK PolyU Joint Lab Solid Waste Sci, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Yijun,He, Xingxing,Zhang, Shaohua,et al. Strength and microstructure properties of solidified sewage sludge with two types of cement-based binders[J]. SCIENTIFIC REPORTS,2020,10(1):12. |
| APA | Chen, Yijun,He, Xingxing,Zhang, Shaohua,Tan, Xun,&Wan, Yong.(2020).Strength and microstructure properties of solidified sewage sludge with two types of cement-based binders.SCIENTIFIC REPORTS,10(1),12. |
| MLA | Chen, Yijun,et al."Strength and microstructure properties of solidified sewage sludge with two types of cement-based binders".SCIENTIFIC REPORTS 10.1(2020):12. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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