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Investigation of physicochemical changes of soft clay around deep geopolymer columns


Geopolymers show good promise for soft clay stabilization. This paper aimed to improve soft clay with geopolymer and evaluate the effects of geopolymer-stabilized columns on the mechanical and chemical behavior of the surrounding clay. Ranges of tests were conducted on both stabilized and unstabilized specimens to determine the impacts of geopolymer on the clay structure. The results showed that increasing the binder content and curing time significantly increased the unconfined compressive strength of stabilized samples. Microstructure and mineralogy analyses revealed that hardened materials were formed within the geopolymer matrix from the amorphous clay phases. In addition, the formation of the effective area around the geopolymer-stabilized columns resulted in the water content of soft clay decreasing while the undrained shear strength, pH, and electric conductivity values increased. Furthermore, the bearing capacity of soft clay dramatically increased (30-fold) due to an increase in column area.

ISSN: 1078-7275
EISSN: 1558-9161
Coden: ENGEA9
Serial Title: Environmental & Engineering Geoscience
Serial Volume: 28
Serial Issue: 4
Title: Investigation of physicochemical changes of soft clay around deep geopolymer columns
Affiliation: University of Ataturk, Department of Civil Engineering, Erzurum, Turkey
Pages: 371-386
Published: 202211
Text Language: English
Publisher: Geological Society of America, Association of Engineering Geologists, College Station, TX, United States
References: 82
Accession Number: 2022-066985
Categories: Engineering geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 plate, 3 tables
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2022, American Geosciences Institute. Abstract, Copyright, Association of Engineering Geologists and the Geological Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 202223
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