›› 2008, Vol. 29 ›› Issue (4): 1010-1014.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Strength characteristics and microstructure of solidified lake sludge

ZHOU Min, HOU Hao-bo, ZHANG Da-jie, TIAN Xiao-feng, LI Jin-ping   

  1. 1. School of Resources and Environmental Science, Wuhan University, Wuhan 430072, China
  • Received:2006-05-19 Online:2008-04-10 Published:2013-07-10

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Abstract: The slag cementitious material is used as a new kind of binding agent for solidification/stabilization with lake sludge. The mechanism and strength characteristics of treated sludge are studied. The slag cementitious material can greatly improve the unconfined compressive strength of sludge at various curing periods with the 5 % content, while 12.5 % content is optimal for strength development (1.55 MPa at 28th day). The treated sludge strength is high in early period; and the long-term strength is increasing with a good ability of water resistance. SEM analysis shows that pozzolanic reaction occurred in the slag cementitious material and sludge particles, and formed high strength and insoluble mineral cement to decrease the macropores in treated sludge. The binding performance is obviously improved. All those show that the slag cementitious material is a preferable solidifying agent for lake sludge.

Key words: lake sludge, solidification, slag cementitious material, compressive strength, microstructure

CLC Number: 

  • TU 411
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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