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DOI | 10.1016/j.crm.2021.100323 |
Enzymatic calcification to solidify desert sands for sandstorm control | |
Sun X.; Miao L.; Wang H.; Wu L.; Zhang J. | |
发表日期 | 2021 |
ISSN | 2212-0963 |
起始页码 | 59 |
结束页码 | 70 |
卷号 | 33 |
英文摘要 | Sandstorms have been recognized as severe natural disasters worldwide and are increasingly occurring due to land desertification. In this study, an effective and environmentally friendly method (enzymatically induced calcite precipitation-polyvinyl acetate, EICP-PVAc) was proposed for sandstorm control. The technique was applied in a large-scale desert sand solidification experiment (50000 m2) to study the wind-erosion resistance of the technology in the Tengri desert. Due to the straw checkerboard barrier zone and the sand control belt with low barriers zone are easily buried by shifting sands. These engineering methods cannot be reset based on actual field status; so, they easily loss the function of sand proof. The EICP-PVAc method proposed for shifting sand solidification can adapt to the change of different terrain conditions and is suitable for shifting sands with changeable wind direction. After treatment, the straw checkerboard barriers zone and the sand control belt with low barriers zone had larger surface strengths, thicker cemented crust layers and larger CaCO3 contents. The surface strength increased exponentially with increasing thickness of crust layer. In addition, the network structure of PVAc not only increased the ability of solidifying sand stabilization to resist rain erosion, but also enhanced the intensity of sand stabilization. Therefore, the treatment ensured a long-term rainfall-erosion resistance. Moreover, the wind-erosion resistance of the treated area was significantly improved, and the desert sands in this area were not blown by wind in 60 days. The results demonstrated that EICP-PVAc treatment significantly controlled sandstorm, which presents promising potential for anti-desertification. © 2021 |
英文关键词 | Enzymatically induced calcite precipitation; Polyvinyl acetate; Rainfall-erosion; Sandstorm control; Wind-erosion |
来源期刊 | Climate Risk Management |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/183086 |
作者单位 | Institute of Geotechnical Engineering, Southeast University, Nanjing, Jiangsu 210096, China; China Design Group Co. LDT, Nanjing, Jiangsu 210014, China |
推荐引用方式 GB/T 7714 | Sun X.,Miao L.,Wang H.,et al. Enzymatic calcification to solidify desert sands for sandstorm control[J],2021,33. |
APA | Sun X.,Miao L.,Wang H.,Wu L.,&Zhang J..(2021).Enzymatic calcification to solidify desert sands for sandstorm control.Climate Risk Management,33. |
MLA | Sun X.,et al."Enzymatic calcification to solidify desert sands for sandstorm control".Climate Risk Management 33(2021). |
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