Eighth International Conference on Case Histories in Geotechnical Engineering
Tri-Axial Shear Behavior of Xanthan Gum Biopolymer-Treated Sand
Publication: Geo-Congress 2019: Soil Improvement (GSP 309)
ABSTRACT
Recently, soil strengthening using gel-type biopolymers have been attempted by many researchers. However, most previous studies have been conducted by focusing on feasibility of biopolymers as a new soil binder with lack of in situ considerations (e.g., confinement and strain-stress related variation). This study aims to investigate the shear behavior of xanthan gum-treated sand under different in situ confinement conditions. Laboratory tri-axial test is performed under three different confinement conditions (σ3=50 kPa, 100 kPa, 200 kPa) with different xanthan gum biopolymer contents (mbp/ms=0.5%, 1.0%, 2.0%). It is revealed that high shear strength is developed when the biopolymer film matrix is established within the pore space when the biopolymer is thoroughly dried in the laboratory (oven). The strengthening effect by biopolymer film is substantial although its enhancement is varied according to xanthan gum contents and confinement conditions.
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ACKNOWLEDGEMENT
This research was supported by a grant (18AWMP-B114119-03) from the Water Management Research Program funded by the Ministry of Land, Infrastructure, and Transport (MOLIT) of the Korean Government; a National Research Foundation of Korea (NRF) grant funded by the Korean Government (MSIP) (No. 2017R1A2B4008635); and a grant (18SCIP-B105148-04) from the Construction Technology Research Program funded by the MOLIT of the Korean Government.
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Information & Authors
Information
Published In
Geo-Congress 2019: Soil Improvement (GSP 309)
Pages: 179 - 186
Editors: Christopher L. Meehan, Ph.D., University of Delaware, Sanjeev Kumar, Ph.D., Southern Illinois University Carbondale, Miguel A. Pando, Ph.D., University of North Carolina Charlotte, and Joseph T. Coe, Ph.D., Temple University
ISBN (Online): 978-0-7844-8211-7
Copyright
© 2019 American Society of Civil Engineers.
History
Published online: Mar 21, 2019
ASCE Technical Topics:
- Engineering fundamentals
- Engineering materials (by type)
- Feasibility studies
- Field tests
- Geomechanics
- Geotechnical engineering
- Material mechanics
- Material properties
- Materials engineering
- Methodology (by type)
- Polymer
- Research methods (by type)
- Shear strength
- Soil dynamics
- Soil mechanics
- Soil properties
- Soil strength
- Strength of materials
- Synthetic materials
- Tests (by type)
- Triaxial loads
Authors
Metrics & Citations
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