›› 2004, Vol. 25 ›› Issue (7): 1023-1026.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Relationship between entrance pore distribution and stress level of natural sedimentary diatomaceous soil

HONG Zhen-shun1, TATEISHI Yoshitaka2, DENG Yong-feng1   

  1. 1. Institute of Geotechnical Engineering, Southeast University, Nanjing 210096, China; 2. Department of Civil Engineering, Ohita Prefectural Nakatsu High School, Ohita 871-0004, Japan
  • Received:2003-05-11 Online:2004-07-09 Published:2014-07-18

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Abstract: The natural normally-consolidated diatomaceous soil deposited in Ohita Prefecture of Japan is a natural strongly structured soil. It has a surprising high strength and high consolidation yield stress although its natural water content is very high. In this study, the mercury intrusion porosimetry (MIP) tests were performed on the natural sedimentary diatomaceous soil to investigate the relationship between the change in entrance pore size distribution and the applied stress level. The microstructure investigation results indicate that the entrance pore size distribution varies little when the stress level is smaller than the consolidation yield stress, but changes significantly when the applied stress is in the vicinity of the consolidation yield stress. When the applied stress is larger than the consolidation yield stress, pore space volume decreases, the maximum pore becomes smaller and the pore size gradually becomes uniform with the increase in applied stress level. The relationship between microstructure and macro-mechanical behavior is also investigated.

Key words: consolidation yield stress, entrance pore size distribution, mercury intrusion porosimetry, natural sedimentary diatomaceous soils, stress level

CLC Number: 

  • TU411.92
  • 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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