Recycling of water treatment sludge in concrete: The role of water-binder ratio from a nanoscale perspective
文献类型：期刊论文
| 作者 | He, Zhi-Hai1,2; Han, Xu-Dong1; Jin, Jia-xu3; Li, Jiang-shan4; Tang, Wei5; Shi, Jin-yan6 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2023-05-15 |
| 卷号 | 873期号:-页码:- |
| 关键词 | Concrete Drinking water sludge ash Water-binder ratio Microstructure Nanoscale |
| ISSN号 | 0048-9697 |
| 英文摘要 | For eutrophic water bodies, potassium permanganate is an effective pre-oxidant to remove algae and its residue in water treatment sludge. Recycling water treatment sludge in concrete is an environmentally friendly and high-value utilization measure. However, little research has been done on the effect of manganese-rich drinking water sludge ash (DWSA) on concrete. The effect of water-binder ratio (w/b) on strength, shrinkage and microstructural character-istics of concrete containing DWSA was investigated, and the structural behavior was explained from a nanoscale per-spective. The results show that recycling 10 % DWSA in concrete improved the strength and shrinkage resistance of the samples. Reducing the w/b effectively increased the strength of DWSA-modified concrete and reduced the shrinkage deformation. The paste with high w/b had higher contents of non-evaporated water and calcium hydroxide, as well as higher reaction degree of DWSA. Nanoscale characterization shows that reducing the w/b reduced the volume fraction of pore and unhydrated phases in the matrix and increased the proportion of high-density C-S-H. Meanwhile, reducing the w/b also reduced the interfacial transition zone width of DWSA-modified concrete. Recycling DWSA in concrete effectively reduced the total carbon footprint and cost of the mixture. The combined application of reducing the w/ b and incorporating DWSA effectively improved the economic and environmental benefits of concrete material. For the concrete modified with 10 % DWSA (w/b = 0.3), its cost and carbon emissions are reduced by 14 %-21 % and 19 %-25 % compared with the reference sample, respectively. Overall, this study reveals the action mechanism of DWSA in cement system at different w/b from nanoscale perspective, and gives a new insight on determining the op-timal w/b in full-scale application of DWSA concrete. |
| 学科主题 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000951401600001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35501]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.College of Civil Engineering, Shaoxing University, Shaoxing 312000, China 2.Key Laboratory of Rock Mechanics and Geohazards of Zhejiang Province, Shaoxing 312000, China 3.School of Civil Engineering, Liaoning Technical University, Fuxin, Liaoning 123000, China 4.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China 5.Department of Architecture and Design Art, Shaoxing Vocational and Technical College, Shaoxing 312000, China 6.School of Civil Engineering, Central South University, Changsha 410075, China |
| 推荐引用方式 GB/T 7714 | He, Zhi-Hai,Han, Xu-Dong,Jin, Jia-xu,et al. Recycling of water treatment sludge in concrete: The role of water-binder ratio from a nanoscale perspective[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2023,873(-):-. |
| APA | He, Zhi-Hai,Han, Xu-Dong,Jin, Jia-xu,Li, Jiang-shan,Tang, Wei,&Shi, Jin-yan.(2023).Recycling of water treatment sludge in concrete: The role of water-binder ratio from a nanoscale perspective.SCIENCE OF THE TOTAL ENVIRONMENT,873(-),-. |
| MLA | He, Zhi-Hai,et al."Recycling of water treatment sludge in concrete: The role of water-binder ratio from a nanoscale perspective".SCIENCE OF THE TOTAL ENVIRONMENT 873.-(2023):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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