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Experimental Study on Size Effect of Aggregate Derived from Clay in Xuyi on Water Stability of Filled Material(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2008年第04期
Page:
412-
Research Field:
水资源与地质工程
Publishing date:

Info

Title:
Experimental Study on Size Effect of Aggregate Derived from Clay in Xuyi on Water Stability of Filled Material
Author(s):
ZHENG Jun1; YAN Chang-hong1; XIA Wen-jun2; CUI Da-wei2;  ZHOU Xin2; ZHANG Yi-gui3; ZHANG Rui3; ZHAN Qi-wei1
1.Department o f Geoscience, Nanjing University, Nanjing 210093, Jiangsu, China; 2.Jiangsu Highway Constraction Headquarters, Nanjing 210004, Jiangsu, China; 3. Huaian Highway Constraction Headquarters, Huaian 223001, Jiangsu, China)
Keywords:
clay;  aggregate;  water stability;  California Bearing Ratio
PACS:
TU443
DOI:
-
Abstract:
To study the size effect of clay aggregate in Xuyi on water stability of improved filled material in a highway project in the north of Jiangsu Province, the California Bearing Ratio(CBR) tests were performed on eight types of samples stabilized by lime and CMSC firming agent which were added into clay with different grain sizes. It is found that the swelling rate and the absorption of water quantity of the lime soil and the improved soil by CMSC firming agent firstly decrease and then increase along with the increasing of average grain size of aggregates. However, the CBR value of the lime soil and the improved soil by CMSC firming agent firstly increases and then decreases along with the increasing of average grain size of aggregates. Meanwhile, through comparing the two soil-stabilizing methods, the whole improved effect of improved soil by CMSC firming agent is better than the lime soil. The CBR value could reach its maximum more easily when its average grain size of aggregates is greater than the lime soil. And the size effect of aggregate on the CBR value of improved soil by CMSC firming agent is less than the lime soil. On the basis of the above findings, the influence of aggregate size on water stability of studied soils is analyzed and discussed. The conclusion drawn from the test is significant and useful for further studies on the engineering properties of filled materials.

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Last Update: 2008-12-20