Work-Based Framework for Sample Quality Evaluation of Low Plasticity Soils

AbstractSampling and laboratory testing of soils is often necessary to evaluate site-specific soil properties. Prior research has been primarily performed for clays, producing accepted practices that enable reliable soil characterization via laboratory testing [e.g., Δe/e0 and sample quality designa...

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Bibliographic Details
Published in:Journal of geotechnical and geoenvironmental engineering 2018-10, Vol.144 (10)
Main Authors: DeJong, Jason T, Krage, Christopher P, Albin, Brian M, DeGroot, Don J
Format: Article
Language:English
Subjects:
Clay
Compressing
Compression
Disturbance
Evaluation
Frameworks
Laboratories
Laboratory tests
Overburden
Plastic properties
Plasticity
Quality assessment
Sediments
Silt
Soil
Soil contamination
Soil properties
Soil testing
Technical Papers
Testing
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Summary:AbstractSampling and laboratory testing of soils is often necessary to evaluate site-specific soil properties. Prior research has been primarily performed for clays, producing accepted practices that enable reliable soil characterization via laboratory testing [e.g., Δe/e0 and sample quality designation (SQD)]. Synthetic mixtures of nonplastic to plastic silts and clays are tested using oedemetric constant rate of strain consolidation. Results indicate trends of increasing sample quality with decreasing plasticity and in situ overburden stress that are independent of the level of induced disturbance. A framework for assessing sample quality based on concepts of work and strain-energy is developed and shown to be independent of these effects. Normalization of the initial recompression slope (Cr or Crw) by the virgin compression slope (Cc or Ccw) results in an index Cr/Cc (or Crw/Ccw) that accurately captures disturbance for soils across a wide range of tested conditions. This method is further evaluated using data from published prior studies.
ISSN:1090-0241
1943-5606
DOI:10.1061/(ASCE)GT.1943-5606.0001941