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A platform for research: civil engineering, architecture and urbanism
Use of polyethylene terephthalate fibres for mitigating the liquefaction-induced failures
https://orcid.org/0000-0002-7220-4040
https://orcid.org/0000-0001-6216-9205
https://orcid.org/0000-0002-4685-5560
Abstract The presence of non-biodegradable plastic waste is a serious concern for the health of endangered species. The present study is based on the sustainable utilisation of polyethylene terephthalate (PET) fibres obtained from waste plastic bottles to enhance the liquefaction resistance of fine sand. After performing a series of stress-controlled cyclic triaxial tests, the cyclic behaviour of PET-fibre reinforced sand has been investigated. The application of PET fibres was found to be more satisfactory in medium dense sand than that in loose sand as observed by residual excess pore water curves. In medium dense sand with 0.6% PET-fibres, the number of cycles to reach liquefaction was about 4 times that of the unreinforced sand. Using the dynamic shear modulus (G), the degradation index was calculated for both reinforced and unreinforced soils to assess stiffness characteristics. After nearly 50 loading cycles, the value of G/G max increased 2.55 times with the addition of 0.4% PET fibres in unreinforced sand. Based on the results obtained, a regression model has been developed for the calculation of number of liquefaction failure cycles (N cyc,L) in correlation with several parameters, namely, relative density (D r), fibre content (FC) and σ d /σ c ′ (σ d = deviator stress, σ c ′ = effective confining stress).
Highlights Liquefaction resistance of fine sand reinforced with polyethylene terephthalate (PET) fibres has been calculated. Fibre content, relative density and deviator stress played a key role in affecting failure cycles. Residual excess pore water pressure was evaluated to assess the plastic deformation during liquefaction. Dynamic shear modulus and degradation index have been determined to assess stiffness characteristics. Regression models have been developed to predict the number of failure cycles to attain a liquefaction state.
Use of polyethylene terephthalate fibres for mitigating the liquefaction-induced failures
https://orcid.org/0000-0002-7220-4040
https://orcid.org/0000-0001-6216-9205
https://orcid.org/0000-0002-4685-5560
Abstract The presence of non-biodegradable plastic waste is a serious concern for the health of endangered species. The present study is based on the sustainable utilisation of polyethylene terephthalate (PET) fibres obtained from waste plastic bottles to enhance the liquefaction resistance of fine sand. After performing a series of stress-controlled cyclic triaxial tests, the cyclic behaviour of PET-fibre reinforced sand has been investigated. The application of PET fibres was found to be more satisfactory in medium dense sand than that in loose sand as observed by residual excess pore water curves. In medium dense sand with 0.6% PET-fibres, the number of cycles to reach liquefaction was about 4 times that of the unreinforced sand. Using the dynamic shear modulus (G), the degradation index was calculated for both reinforced and unreinforced soils to assess stiffness characteristics. After nearly 50 loading cycles, the value of G/G max increased 2.55 times with the addition of 0.4% PET fibres in unreinforced sand. Based on the results obtained, a regression model has been developed for the calculation of number of liquefaction failure cycles (N cyc,L) in correlation with several parameters, namely, relative density (D r), fibre content (FC) and σ d /σ c ′ (σ d = deviator stress, σ c ′ = effective confining stress).
Highlights Liquefaction resistance of fine sand reinforced with polyethylene terephthalate (PET) fibres has been calculated. Fibre content, relative density and deviator stress played a key role in affecting failure cycles. Residual excess pore water pressure was evaluated to assess the plastic deformation during liquefaction. Dynamic shear modulus and degradation index have been determined to assess stiffness characteristics. Regression models have been developed to predict the number of failure cycles to attain a liquefaction state.
Use of polyethylene terephthalate fibres for mitigating the liquefaction-induced failures
https://orcid.org/0000-0002-7220-4040
https://orcid.org/0000-0001-6216-9205
https://orcid.org/0000-0002-4685-5560
Abstract The presence of non-biodegradable plastic waste is a serious concern for the health of endangered species. The present study is based on the sustainable utilisation of polyethylene terephthalate (PET) fibres obtained from waste plastic bottles to enhance the liquefaction resistance of fine sand. After performing a series of stress-controlled cyclic triaxial tests, the cyclic behaviour of PET-fibre reinforced sand has been investigated. The application of PET fibres was found to be more satisfactory in medium dense sand than that in loose sand as observed by residual excess pore water curves. In medium dense sand with 0.6% PET-fibres, the number of cycles to reach liquefaction was about 4 times that of the unreinforced sand. Using the dynamic shear modulus (G), the degradation index was calculated for both reinforced and unreinforced soils to assess stiffness characteristics. After nearly 50 loading cycles, the value of G/G max increased 2.55 times with the addition of 0.4% PET fibres in unreinforced sand. Based on the results obtained, a regression model has been developed for the calculation of number of liquefaction failure cycles (N cyc,L) in correlation with several parameters, namely, relative density (D r), fibre content (FC) and σ d /σ c ′ (σ d = deviator stress, σ c ′ = effective confining stress).
Highlights Liquefaction resistance of fine sand reinforced with polyethylene terephthalate (PET) fibres has been calculated. Fibre content, relative density and deviator stress played a key role in affecting failure cycles. Residual excess pore water pressure was evaluated to assess the plastic deformation during liquefaction. Dynamic shear modulus and degradation index have been determined to assess stiffness characteristics. Regression models have been developed to predict the number of failure cycles to attain a liquefaction state.
Use of polyethylene terephthalate fibres for mitigating the liquefaction-induced failures
Jain, Arpit (author) / Mittal, Satyendra (author) / Shukla, Sanjay Kumar (author)
Geotextiles and Geomembranes ; 51 ; 245-258
2022-11-03
14 pages
Article (Journal)
Electronic Resource
English
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