Microstructural Analyses of a Stabilized Sand by a Deep-Mixing Method

AbstractThe deep-mixing method (DMM) involves the mechanical mixing of in-situ soil with various stabilizing binders, which chemically react with the soil or the groundwater. Microstructural analyses are valuable tools to support ordinary geotechnical laboratory tests to assess the effectiveness of...

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Bibliographic Details
Published in:Journal of geotechnical and geoenvironmental engineering 2020-06, Vol.146 (6)
Main Authors: Bellato, Diego, Marzano, Ignazio Paolo, Simonini, Paolo
Format: Article
Language:English
Subjects:
Binders
Compressive strength
Groundwater
Laboratories
Laboratory tests
Mercury
Porosity
Qualitative analysis
Sandy soils
Soil
Soil mechanics
Soil porosity
Soil stabilization
Soil treatment
Stabilizing
Technical Papers
X ray microtomography
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Summary:AbstractThe deep-mixing method (DMM) involves the mechanical mixing of in-situ soil with various stabilizing binders, which chemically react with the soil or the groundwater. Microstructural analyses are valuable tools to support ordinary geotechnical laboratory tests to assess the effectiveness of ground improvement works. This paper presents the results of microstructural analyses on in-situ retrieved samples and laboratory mixed specimens related to an actual deep mixing job site. Mercury porosimetry and X-ray computed Microtomography were used to determine the total porosity and to characterize the pore network of both types of samples. The results of the analyses allowed a qualitative understanding of the degree of mixing of the soil with the binder suspension under laboratory and field conditions. Additionally, an original correlation between total porosity and unconfined compressive strength was obtained based on the experimental data for cement-treated sandy soils at long curing time.
ISSN:1090-0241
1943-5606
DOI:10.1061/(ASCE)GT.1943-5606.0002254