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| COMPARATIVE EXPERIMENT OF ELECTROOSMOSIS OF FERRUM，GRAPHITE，COPPER AND ALUMINUM ELECTRODE |
| TAO Yanli1，2，ZHOU Jian1，GONG Xiaonan1 |
(1. Research Center of Coastal and Urban Geotechnical Engineering，Zhejiang University，Hangzhou，Zhejiang 310058，China；
2. Tianjin Key Laboratory of Soft Soil Characteristics and Engineering Environment，Tianjin 300384，China) |
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Abstract Laboratory tests of typical Hangzhou soft soil were conducted to investigate the electroosmosis effects of ferrum，graphite，copper and aluminum electrode under the voltage gradient of 1.58，0.79 and 0.53 V/cm respectively. By monitoring and analyzing drainage，effective voltage，water content reduction and energy consumed of each test，the following conclusions were drawn. Differences of the electroosmosis effects of ferrum，graphite，copper and aluminum electrode decrease with the drop of voltage gradient. Under higher voltage gradient，ferrum and graphite electrode performs quite accordance and their electroosmosis effects are much better than copper electrode. While with a relative lower voltage gradient，copper electrode displays slightly better than ferrum electrode，which again has a better performance over graphite electrode. Aluminum electrode represents the worst performance under all circumstances investigated. The conclusions can be reached by comparing the above results with former results that graphite electrode occupies a better performance over ferrum and copper electrode under higher voltage gradient，while performs worse than the other two electrodes under lower voltage gradient. In the real practice，the mineral constituent or ionic composition of the soil should be analyzed to select the optimum electrode material. Moreover，ferrum electrode is recommended as a preferential alternative in the electroosmosis strengthening of the soft soil in the coastal area of Zhejiang Province，while aluminum electrode is not suggested.
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Received: 14 June 2012
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2013, Vol. 32 
