Geomechanics and Engineering

  • 제17권6호
  • /
  • Pages.543-551
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  • 2019
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Experimental study on treatment of waste slurry by vacuum preloading with different conditioning agents

  • Wu, Yajun (Department of Civil Engineering, Shanghai University) ;
  • Jiang, Haibo (Department of Civil Engineering, Shanghai University) ;
  • Lu, Yitian (Department of Civil Engineering and Architecture, Saga University) ;
  • Sun, Dean (Department of Civil Engineering, Shanghai University)
  • 투고 : 2018.04.15
  • 심사 : 2019.03.17
  • 발행 : 2019.04.30
⟨ 이전 논문 다음 논문 ⟩

초록

In China, serious environmental problems are induced by the extremely soft construction waste slurries in many urban areas, and there is no appropriate method to treat it presently. In this paper, four model tests were conducted to investigate the efficiency of waste slurry treatment by combining three conditioning agents which can change characteristics of the slurries with a traditional vacuum preloading method. The tests of size analysis of particle aggregate were conducted to investigate the influence of different conditioning agents on the size distributions of particle aggregate. During the model test, the discharged water volumes were monitored. The pore-size distribution and void ratio of the waste slurries after the vacuum preloading were measured by mercury intrusion porosimetry (MIP). It is found that 1) During the natural precipitation, volume of water out of the organic agent is higher than that of the mixed agent, but it is smaller than that of the mixed agent in the vacuum preloading stage; 2) the mixed agent has a higher total volume of water out than the organic agent and the inorganic agent after test, while the organic agent and the inorganic agent have little difference with respect to the drainage effect. The results demonstrate that the combination of mixed conditioning agent and vacuum preloading for the solid-liquid separation in waste slurry has a satisfactory effect and can be applied in engineering practice.

키워드

과제정보

연구 과제 주관 기관 : Natural Science Foundation of China

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