USE OF STIFFNESS FOR EVALUATING COMPACTNESS OF COHESIVE PAVEMENT GEOMATERIALS
There has been a recent push toward adoption of in-place soil stiffness as a means of assessing compactness of pavement geomaterials. From a series of low strain GeoGauge stiffness measurements made under controlled laboratory conditions on compacted silts, the variation of stiffness with water content, dry unit weight, degree of saturation, volume change upon wetting, shear strength, and soil plasticity is discussed. In general, the GeoGauge stiffness is not directly related to dry unit weight, and it peaks dry of optimum and decreases upon wetting. Soil specimens with a large stiffness also tend to be stronger, but they also tend to swell more upon wetting, implying that the shrink-swell potential is not optimized if stiffness is. These results help advance the understanding of the role of stiffness in assessing compactness of cohesive geomaterials.
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Availability:
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Supplemental Notes:
- This paper appears in Transportation Research Record No. 1849, Soil Mechanics 2003.
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Corporate Authors:
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Authors:
- Ooi, PSK
- Pu, J
- Publication Date: 2003
Language
- English
Media Info
- Features: Figures; Photos; References; Tables;
- Pagination: p. 11-19
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Serial:
- Transportation Research Record
- Issue Number: 1849
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Cohesive soils; Compacted soils; Laboratory tests; Moisture content; Percent saturation; Plasticity; Shear strength; Silts; Soil compaction; Stiffness; Volume changes; Weight
- Uncontrolled Terms: GeoGauge; Geomaterials
- Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;
Filing Info
- Accession Number: 00965601
- Record Type: Publication
- ISBN: 0309085845
- Files: TRIS, TRB, ATRI
- Created Date: Nov 20 2003 12:00AM