Article 2022 · 5 citations

Investigation of Physicochemical Changes of Soft Clay around Deep Geopolymer Columns

Abstract

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 dramat-ically increased (30-fold) due to an increase in column area.

Keywords

Deep Mixing Geopolymer Soft Clays Full-Scale Tests Ground Improvement FLY-ASH STRENGTH DEVELOPMENT MECHANICAL-PROPERTIES PROPERTY CHANGES NATURAL ZEOLITE PORTLAND-CEMENT MARINE CLAY CONCRETE LIME SLAG

WoS Categories

Engineering, Environmental Engineering, Geological Geosciences, Multidisciplinary

Sustainable Development Goals

Responsible Consumption and Production

Citation

Journal: ENVIRONMENTAL & ENGINEERING GEOSCIENCE
Year: 2022
Volume: 28
Issue: 4
Pages: 371-386
ISSN: 1078-7275
eISSN: 1558-9161
WoS UID: WOS:000887267100004