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Study on the Dewatering Effect of In-Situ Dredged Mud Under the Combined Action of Flocculant-Absorbent
In order to overcome the problems of high construction costs and soil alkalinization associated with chemical curing methods for treating soils with high moisture content, a combined flocculant-absorbent treatment method with super absorbent polymer (SAP) was proposed. The suitability of the optimum flocculant cationic polyacrylamide (CPAM) (0.4‰) for dredged mud in its original state was verified and a comparative study of the drying effect of the absorbent for SAP was carried out. The test results show: after 24 h of standing, the percentage of clear liquor precipitated in the CPAM-0.4, APAM-0.4 and NPAM-0.8 groups was 36%, 32% and 31% of the slurry volume respectively, with the CPAM-0.4 group precipitating the most and the pH of the as-built dredged slurry already approaching neutral pH. Therefore CPAM-0.4 is the optimum flocculant and its corresponding optimum dose. In the second step of the model test, the three absorption methods of SAP need to be reasonably arranged in conjunction with the actual project. Finally, the construction process guidance of the combined flocculant-absorbent treatment method for very high moisture content mud is proposed, which does not cause alkalinization of the soil and has the advantages of short construction period, low difficulty and low cost. This method does not alkalize the soil and has the advantages of short construction period, low difficulty and low cost.
Study on the Dewatering Effect of In-Situ Dredged Mud Under the Combined Action of Flocculant-Absorbent
In order to overcome the problems of high construction costs and soil alkalinization associated with chemical curing methods for treating soils with high moisture content, a combined flocculant-absorbent treatment method with super absorbent polymer (SAP) was proposed. The suitability of the optimum flocculant cationic polyacrylamide (CPAM) (0.4‰) for dredged mud in its original state was verified and a comparative study of the drying effect of the absorbent for SAP was carried out. The test results show: after 24 h of standing, the percentage of clear liquor precipitated in the CPAM-0.4, APAM-0.4 and NPAM-0.8 groups was 36%, 32% and 31% of the slurry volume respectively, with the CPAM-0.4 group precipitating the most and the pH of the as-built dredged slurry already approaching neutral pH. Therefore CPAM-0.4 is the optimum flocculant and its corresponding optimum dose. In the second step of the model test, the three absorption methods of SAP need to be reasonably arranged in conjunction with the actual project. Finally, the construction process guidance of the combined flocculant-absorbent treatment method for very high moisture content mud is proposed, which does not cause alkalinization of the soil and has the advantages of short construction period, low difficulty and low cost. This method does not alkalize the soil and has the advantages of short construction period, low difficulty and low cost.
Study on the Dewatering Effect of In-Situ Dredged Mud Under the Combined Action of Flocculant-Absorbent
Lecture Notes in Civil Engineering
Zhu, Hong-Hu (editor) / Garg, Ankit (editor) / Zhussupbekov, Askar (editor) / Su, Li-Jun (editor) / Wang, Yanjie (author) / Yang, Zhongjian (author) / Zhu, Fuqiang (author) / Ma, Yue (author) / Ren, Jincheng (author)
Belt and Road Webinar Series on Geotechnics, Energy and Environment ; 2021
2022-02-16
10 pages
Article/Chapter (Book)
Electronic Resource
English
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