›› 2006, Vol. 27 ›› Issue (5): 740-744.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Engineering properties and microstructure feature of solidified sludge

CAO Yong-hua1, YAN Shu-wang1, ZHAO Le-jun2   

  1. 1. School of Civil Engineering, Tianjin University, Tianjin 300072, China; 2. Tianjin Municipal Engineering Design Institute, Tianjin 300051, China
  • Received:2004-08-30 Online:2006-05-10 Published:2013-11-05

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Abstract: Landfill is a prevalent method for wastewater sludge disposal. Laboratory tests were conducted to study engineering property of sludge solidified by fly ash, lime and silty clay of varied ratios. The experiment results revealed that the strength of solidified sludge was as high as it is required for landfill; and permeability was improved significantly. Using freeze-drying technology and scanning electron microscope (SEM), the microstructure of solidified sludge is studied. It is found that the compactness of sludge was improved after solidification, which is an important reason for strength improvement. Applying theory of fractal geometry, quantitative analysis is carried out on the SEM images. The analysis reveals a considerable positive correlation between fractal dimension and strength.

Key words: sludge solidification, SEM, sludge, fractal dimension

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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