Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Use of Chitosan Biopolymer and Fly Ash to Enhance Mechanical Properties of Soil
For the stabilization of expansive soil, chemical stabilizers like cement and fly ash are more often used. But chemical stabilizers are not eco-friendly. Therefore, an attempt is toward an eco-friendly and sustainable additive possessing efficient property to replace such chemical additives. Thus, biological additive like biopolymers is studied. Biopolymer like chitosan is widely used in geotechnical concern giving effective strength gain results. In the present study, an optimum dosage of chitosan (CS) is found out performing UCS test by increasing chitosan of 0, 0.01, 0.0125, 0.025 and 0.05%. Then, the fly ash (FA) was amended to the soil by weight of 15, 20, 25 and 30% to find out the right amount that may provide strength characteristics. Laboratory tests like unconfined compressive strength test (UCS) and direct shear test (DST) are performed for dry condition curing of 0 day, 1 day, 3 days, 7 days and 28 days on clay soil, chitosan treated clay soil and fly ash amended clay soil. Results are compared between treated and untreated soil. Strength gain is achieved in stabilized soils with respect to an untreated BCS due to increase in cohesion of clay. Numerical model was tested using Plaxis 2D to analyze the settlement characteristics of the stabilized soil. It showed that the chitosan treated soil with 20% fly ash replacement (CS-FA) provided good results.
Use of Chitosan Biopolymer and Fly Ash to Enhance Mechanical Properties of Soil
For the stabilization of expansive soil, chemical stabilizers like cement and fly ash are more often used. But chemical stabilizers are not eco-friendly. Therefore, an attempt is toward an eco-friendly and sustainable additive possessing efficient property to replace such chemical additives. Thus, biological additive like biopolymers is studied. Biopolymer like chitosan is widely used in geotechnical concern giving effective strength gain results. In the present study, an optimum dosage of chitosan (CS) is found out performing UCS test by increasing chitosan of 0, 0.01, 0.0125, 0.025 and 0.05%. Then, the fly ash (FA) was amended to the soil by weight of 15, 20, 25 and 30% to find out the right amount that may provide strength characteristics. Laboratory tests like unconfined compressive strength test (UCS) and direct shear test (DST) are performed for dry condition curing of 0 day, 1 day, 3 days, 7 days and 28 days on clay soil, chitosan treated clay soil and fly ash amended clay soil. Results are compared between treated and untreated soil. Strength gain is achieved in stabilized soils with respect to an untreated BCS due to increase in cohesion of clay. Numerical model was tested using Plaxis 2D to analyze the settlement characteristics of the stabilized soil. It showed that the chitosan treated soil with 20% fly ash replacement (CS-FA) provided good results.
Use of Chitosan Biopolymer and Fly Ash to Enhance Mechanical Properties of Soil
Lecture Notes in Civil Engineering
Agnihotri, Arvind Kumar (Herausgeber:in) / Reddy, Krishna R. (Herausgeber:in) / Chore, H. S. (Herausgeber:in) / Shinde, Rohan M. (Autor:in) / Jambhulkar, Shweta G. (Autor:in) / Dalvi, Rupa S. (Autor:in)
Indian Geotechnical and Geoenvironmental Engineering Conference ; 2021
24.11.2022
14 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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