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A platform for research: civil engineering, architecture and urbanism
Soil improvement using agar gum polymer for seismic liquefaction mitigation
Abstract Liquefaction can cause ground subsidence and structural collapses, which could result in considerable damage. While numerous preventive methods have been proposed to prevent such liquefaction, most of these methods involve cement-based reinforcements, thus potentially introducing other environmental problems, such as groundwater contamination and increased carbon dioxide emissions. Therefore, it is essential to develop and use eco-friendly, ground-reinforcement materials. Agar gum is an eco-friendly biopolymer extracted as a result of the biological activities of microorganisms. Ground-reinforcement of agar gum enhances its effectiveness in improving the unconfined compressive and shear strengths, thus making it a suitable, eco-friendly, ground-reinforcement material. However, while the use of agar gum could (logically) increase the strength of liquefaction resistance, there is insufficient research to support this assumption. Therefore, in this study, the viscosity, unconfined compressive strength, and hardness of agar gum were quantified, and the liquefaction resistance strength was evaluated based on cyclic triaxial tests using agar-gum-treated samples. The hardness, unconfined compressive strength, and liquefaction resistance strength increased with increasing agar gum concentrations, and the change based on a curing time was relatively constant. In addition, the effect of enhancing the liquefaction resistance strength using agar gum was confirmed based on a comparison with previous studies using untreated samples and other reinforcing materials.
Highlights Evaluation of liquefaction resistance strength of biopolymer as an eco-friendly ground reinforcement material. Agar gum is an eco-friendly material as a biopolymer and is effective in ground reinforcement. The agar gum-treated sample has a higher liquefaction resistance strength than the untreated sample. As the concentration of agar gum increases, the liquefaction resistance strength becomes stronger. Agar gum treatment is effective in reinforcing liquefaction of the ground in the long term.
Soil improvement using agar gum polymer for seismic liquefaction mitigation
Abstract Liquefaction can cause ground subsidence and structural collapses, which could result in considerable damage. While numerous preventive methods have been proposed to prevent such liquefaction, most of these methods involve cement-based reinforcements, thus potentially introducing other environmental problems, such as groundwater contamination and increased carbon dioxide emissions. Therefore, it is essential to develop and use eco-friendly, ground-reinforcement materials. Agar gum is an eco-friendly biopolymer extracted as a result of the biological activities of microorganisms. Ground-reinforcement of agar gum enhances its effectiveness in improving the unconfined compressive and shear strengths, thus making it a suitable, eco-friendly, ground-reinforcement material. However, while the use of agar gum could (logically) increase the strength of liquefaction resistance, there is insufficient research to support this assumption. Therefore, in this study, the viscosity, unconfined compressive strength, and hardness of agar gum were quantified, and the liquefaction resistance strength was evaluated based on cyclic triaxial tests using agar-gum-treated samples. The hardness, unconfined compressive strength, and liquefaction resistance strength increased with increasing agar gum concentrations, and the change based on a curing time was relatively constant. In addition, the effect of enhancing the liquefaction resistance strength using agar gum was confirmed based on a comparison with previous studies using untreated samples and other reinforcing materials.
Highlights Evaluation of liquefaction resistance strength of biopolymer as an eco-friendly ground reinforcement material. Agar gum is an eco-friendly material as a biopolymer and is effective in ground reinforcement. The agar gum-treated sample has a higher liquefaction resistance strength than the untreated sample. As the concentration of agar gum increases, the liquefaction resistance strength becomes stronger. Agar gum treatment is effective in reinforcing liquefaction of the ground in the long term.
Soil improvement using agar gum polymer for seismic liquefaction mitigation
Jang, Chaewoon (author) / Yang, Beomjoo (author) / Hong, Won-Taek (author) / Ahn, Jaehun (author) / Jung, Jongwon (author)
2023-12-08
Article (Journal)
Electronic Resource
English
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