Digital Imaging Technique to Evaluate Shrinkage Strain Potentials of Fiber Reinforced Expansive Soils
Publication: Site Characterization and Modeling
Abstract
Expansive clays exhibit volume changes in accordance with seasonal moisture fluctuations. Shrinkage cracking in expansive soils followed by heaving usually result in distress to pavements and foundations. This paper presents the characterization of shrinkage strain potentials of a fiber reinforced natural expansive soil compacted at optimum and near wet of optimum moisture contents of the soil-fiber matrix. Soil was treated with three types of fibers at dosages of 0.4, 0.6 and 1.0% by total weight of dry soil. Soil specimens were then compacted and oven-dried at 110°C until no further change in moisture content was observed. Three dimensional images of the dried soil specimens were taken to study crack patterns and volumetric shrinkage strains using an image processing, digital imaging technique. Manual measurements were also made and compared with digital measurements to address the reliability of this method. Improvements in expansive soil characterizations using digital imaging measurement techniques are discussed.
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Copyright
© 2005 American Society of Civil Engineers.
History
Published online: May 7, 2012
ASCE Technical Topics:
- Building materials
- Computer vision and image processing
- Engineering fundamentals
- Engineering materials (by type)
- Expansive soils
- Fabrics
- Fine-grained soils
- Geomechanics
- Geotechnical engineering
- Material mechanics
- Material properties
- Materials engineering
- Methodology (by type)
- Shrinkage (material)
- Soil dynamics
- Soil mechanics
- Soil properties
- Soil stabilization
- Soil stress
- Soil water
- Soils (by type)
- Strain
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