Experimental study on shear strength of geopolymer stabilized soft soil

XU Chubo; HU Guo

doi:10.12299/jsues.24-0043

Volume 39 Issue 2

Jun. 2025

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Article Navigation > Journal of Shanghai University of Engineering Science > 2025 > 39(2): 166-173

XU Chubo, HU Guo. Experimental study on shear strength of geopolymer stabilized soft soil[J]. Journal of Shanghai University of Engineering Science, 2025, 39(2): 166-173. doi: 10.12299/jsues.24-0043

Citation:

XU Chubo, HU Guo. Experimental study on shear strength of geopolymer stabilized soft soil[J]. Journal of Shanghai University of Engineering Science, 2025, 39(2): 166-173. doi: 10.12299/jsues.24-0043

XU Chubo, HU Guo. Experimental study on shear strength of geopolymer stabilized soft soil[J]. Journal of Shanghai University of Engineering Science, 2025, 39(2): 166-173. doi: 10.12299/jsues.24-0043

Citation:

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Experimental study on shear strength of geopolymer stabilized soft soil

doi: 10.12299/jsues.24-0043

XU Chubo,
HU Guo^,

School of Urban Railway Transportation, Shanghai University of Engineering Science, Shanghai 201620, China

Received Date: 2024-03-01
Available Online: 2025-09-30
Publish Date: 2025-06-30

Abstract

Abstract

Using solid sodium hydroxide as the alkaline exciter and slag and fly ash as the precursors, the fly ash-slag based geopolymer was prepared by "one-step" method. Through the unconsolidated and undrained (UU) triaxial shear test, the mechanical properties of soft soil stabilized with fly ash-slag based geopolymer were tested, and the influence mechanism of such as fly ash content, water to biner ratio, and curing time on the shear strength of the stabilized soft soil were investigated. The cohesion and internal friction angle of the stabilized soft soil were calculated, and the mechanisms of geopolymer stabilizing soft soil were also analyzed through microscopic tests. The results show that the increase of fly ash doping leads to the decrease of shear strength and internal friction angle of geopolymer stabilized soft soil; the increase of water to binder ratio reduces the shear strength of stabilized soft soil; the increase of cofining pressure makes the strain softening gradually weakened, and the strength gradually improved; the increase of curing time increases the shear strength, and the cohesion and the internal friction angle show a rising trend at the same time.
- geopolymer,
- stabilized soft soil,
- fly ash content,
- confining pressure,
- shear strength

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References(19)

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