Experiment study on dynamic resilient modulus of the compacted clay under moisture content fluctuation
Subgrade soils are important materials to support highways. For the past few decades，the resilient modulus (MR) has been used for characterizing the stress-strain behavior of subgrades subjected to repeated vehicle loadings. It is well known that the moisture content has an important impact on MR of clay. In fact, the moisture of subgrade does not keep stable but fluctuates seasonally. In this paper, the impact of moisture content fluctuation on MR of compacted clay was investigated by laboratory experiment. It is shown that, MR of compacted clay decreases significantly with the moisture content fluctuation cycles, and the bigger fluctuation amplitude is, the lower MR is. So the reduction factor of moisture fluctuation is proposed to reflect this impact on the long term performance of subgrade.
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Supplemental Notes:
- This paper was sponsored by TRB committee AFP60 Engineering Behavior of Unsaturated Soils. Alternate title: Experimental Study on Dynamic Resilient Modulus of Compacted Clay Under Moisture Content Fluctuation.
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Corporate Authors:
500 Fifth Street, NW
Washington, DC United States 20001 -
Authors:
- Ling, Jianming
- Li, Dongxue
- Qian, Jinsong
- Cao, Changwei
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Conference:
- Transportation Research Board 93rd Annual Meeting
- Location: Washington DC
- Date: 2014-1-12 to 2014-1-16
- Date: 2014
Language
- English
Media Info
- Media Type: Digital/other
- Features: Figures; Photos; References; Tables;
- Pagination: 12p
- Monograph Title: TRB 93rd Annual Meeting Compendium of Papers
Subject/Index Terms
- TRT Terms: Compacted clays; Laboratory tests; Modulus of resilience; Soil water; Subgrade (Pavements)
- Subject Areas: Geotechnology; Highways; Pavements; I42: Soil Mechanics;
Filing Info
- Accession Number: 01518696
- Record Type: Publication
- Report/Paper Numbers: 14-5133
- Files: TRIS, TRB, ATRI
- Created Date: Mar 20 2014 1:39PM