›› 2009, Vol. 30 ›› Issue (2): 374-378.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Microscopic image analysis method for grading of eroded soil particles from filtration system

ZHUANG Yan-feng 1, 2, CHEN Lun 1, 2, XU Qi 1, 2, WANG Zhao 3   

  1. 1. Department of Hydraulic and Hydropower Engineering, Tsinghua University, Beijing 100084, China; 2. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China; 3. School of Civil and Architectural Engineering, Wuhan University, Wuhan 430072, China
  • Received:2007-04-12 Online:2009-02-10 Published:2011-01-27

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Abstract:

A method of particle size distribution testing with digital microscope and image analysis software is presented during the research of the stability of filtration system. Microscopic image analysis method is suitable for gradation analysis of small quantity of soil particles which can not be tested through densimeter method. Cost of this testing method is low; but the sampling requirement is high. Good testing result for the silt adopted in the test was achieved by taking isopropyl alcohol as dispersant and 4 g/L as the concentration of the soil. Compared with the testing result of densimeter method, it is shown that the testing result of microscopic image analysis method is credible. Error analysis shows that for the flat and irregular particles, microscopic image analysis method tends to get higher particle size and less fine particles; and densimeter method tends to get the opposite result. Microscopic image analysis is an effective method for the study of the stability of filtration system.

Key words: filtration, microscopic image analysis method, densimeter method, particle size distribution curve, mass percentage, quantity percentage

CLC Number: 

  • TV 223.4
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