Thesis
Suction stress characteristics curve of xanthan gum treated sand
Washington State University
Master of Science (MS), Washington State University
12/2020
DOI:
https://doi.org/10.7273/000004245
Handle:
https://hdl.handle.net/2376/124664
Abstract
Recently, due to numerous environmental concerns, different environmentally-friendly alternatives have been explored and studied in the field of geotechnical engineering to improve desired soil properties. These alternatives have been developed to avoid the use of high greenhouse gas-emitting binders. Cement is one of the most common binders used in soil strengthening. However, cement fabrication is a big concern for climate change. Cement production is the second largest contributor of CO2 production globally. As a result, conventional soil treatments have several environmental shortcomings. Due to environmental concerns, methods such as the potential use of biopolymers for soil stabilization have been studied lately to achieve the strengthening efficiencies for soil. Xanthan gum has become an attractive alternative for soil strength improvement due to its higher tensile strength, pseudo-plasticity, and availability in the market. Efforts to improve the mechanical behavior of soil have been typically focused on the strength of biopolymer-improved soil under the dry condition. However, in shallow surface geoengineering applications, strength of soil changes with saturation. This study measured strength of xanthan gum improved poorly-graded fine sand over a wide range of saturation. The unconfined compressive strength of the xanthan gum treated sand was measured, and the results were interpreted using the suction stress characteristic curve. Xanthan gum treatment increases suction stress through binding over a wide range of saturations and through adsorptive and capillary forces among sand, xanthan gum and water molecules.
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Details
- Title
- Suction stress characteristics curve of xanthan gum treated sand
- Creators
- Ahmad Faysal Shariq
- Contributors
- IDIL DENIZ AKIN (Advisor) - Washington State University, Civil and Environmental Engineering, Department of
- Awarding Institution
- Washington State University
- Academic Unit
- Civil and Environmental Engineering, Department of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University
- Identifiers
- 99900896419201842
- Language
- English
- Resource Type
- Thesis