Sustainable assessment and carbon footprint analysis of polysaccharide biopolymer-amended soft soil as an alternate material to canal lining
Kuttanad region in Kerala, India, is a place that predominantly consists of soft soil formations with low shear strength and low water resistance rendering them problematic for construction purposes. Pavements constructed on such soft deposits have been subjected to structural rutting and the high e...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-06-01
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| Series: | Frontiers in Environmental Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fenvs.2023.1214988/full |
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| author | Romana Mariyam Rasheed Arif Ali Baig Moghal Sathyanarayanan Rambabu Abdullah Almajed |
| author_facet | Romana Mariyam Rasheed Arif Ali Baig Moghal Sathyanarayanan Rambabu Abdullah Almajed |
| author_sort | Romana Mariyam Rasheed |
| collection | DOAJ |
| description | Kuttanad region in Kerala, India, is a place that predominantly consists of soft soil formations with low shear strength and low water resistance rendering them problematic for construction purposes. Pavements constructed on such soft deposits have been subjected to structural rutting and the high erodibility of the in-situ soil necessitates the need to use suitable ground improvement techniques. The present environmental scenario demands the implementation of sustainable techniques for ground rejuvenation and effective stabilizers for enhancing engineering properties. This study investigates the amelioration of Kuttanad soft soil using chitosan as a soil amendment to improve its durability and erodibility characteristics. The untreated and chitosan-treated samples were exposed to 5 h of wetting cycle followed by 43 h of drying cycles until their failure. The unconfined compressive strength (UCS) of samples prepared with different dosages (0.5, 2, 4%) and cured for 14, 28, 60, and 90 days was evaluated at the onset and after each drying cycle to measure their durability index. Kuttanad soil was amended with 2% and cured for 90 days withstood five cycles with a UCS of more than 1,000 kPa. The drip erosion tests were used to check the erodibility performance for the aforementioned different dosages and curing periods. The 2% and 4% chitosan amended samples resisted the entire test duration of 10 min indicating the highest water erosion resistance. The findings of the current study evaluated through durability and erosion tests reinforced the effectiveness of chitosan as an effective biopolymer for soft soils subjected to constant water attack and can be easily implemented in places with such vulnerability. A typical earthen canal lining amended with chitosan reduced the carbon emissions by 8.74 and 7.44 times compared to conventional amendments like lime and cement in Carbon Footprint Analysis. |
| first_indexed | 2024-03-13T05:30:10Z |
| format | Article |
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| issn | 2296-665X |
| language | English |
| last_indexed | 2024-03-13T05:30:10Z |
| publishDate | 2023-06-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Environmental Science |
| spelling | doaj.art-1cf6345d01a545cc9ee41852125362b02023-06-15T04:48:58ZengFrontiers Media S.A.Frontiers in Environmental Science2296-665X2023-06-011110.3389/fenvs.2023.12149881214988Sustainable assessment and carbon footprint analysis of polysaccharide biopolymer-amended soft soil as an alternate material to canal liningRomana Mariyam Rasheed0Arif Ali Baig Moghal1Sathyanarayanan Rambabu2Abdullah Almajed3Assistant Professor, Department of Civil Engineering, TKM College of Engineering, Kollam, IndiaAssociate Professor, Department of Civil Engineering, National Institute of Technology Warangal, Warangal, IndiaM Tech Student, Department of Civil Engineering, National Institute of Technology Warangal, Warangal, IndiaAssociate Professor, Department of Civil Engineering, College of Engineering, King Saud University, Riyadh, Saudi ArabiaKuttanad region in Kerala, India, is a place that predominantly consists of soft soil formations with low shear strength and low water resistance rendering them problematic for construction purposes. Pavements constructed on such soft deposits have been subjected to structural rutting and the high erodibility of the in-situ soil necessitates the need to use suitable ground improvement techniques. The present environmental scenario demands the implementation of sustainable techniques for ground rejuvenation and effective stabilizers for enhancing engineering properties. This study investigates the amelioration of Kuttanad soft soil using chitosan as a soil amendment to improve its durability and erodibility characteristics. The untreated and chitosan-treated samples were exposed to 5 h of wetting cycle followed by 43 h of drying cycles until their failure. The unconfined compressive strength (UCS) of samples prepared with different dosages (0.5, 2, 4%) and cured for 14, 28, 60, and 90 days was evaluated at the onset and after each drying cycle to measure their durability index. Kuttanad soil was amended with 2% and cured for 90 days withstood five cycles with a UCS of more than 1,000 kPa. The drip erosion tests were used to check the erodibility performance for the aforementioned different dosages and curing periods. The 2% and 4% chitosan amended samples resisted the entire test duration of 10 min indicating the highest water erosion resistance. The findings of the current study evaluated through durability and erosion tests reinforced the effectiveness of chitosan as an effective biopolymer for soft soils subjected to constant water attack and can be easily implemented in places with such vulnerability. A typical earthen canal lining amended with chitosan reduced the carbon emissions by 8.74 and 7.44 times compared to conventional amendments like lime and cement in Carbon Footprint Analysis.https://www.frontiersin.org/articles/10.3389/fenvs.2023.1214988/fullchitosandrip erosiondurability indexunconfined compression strengthwetting and drying |
| spellingShingle | Romana Mariyam Rasheed Arif Ali Baig Moghal Sathyanarayanan Rambabu Abdullah Almajed Sustainable assessment and carbon footprint analysis of polysaccharide biopolymer-amended soft soil as an alternate material to canal lining Frontiers in Environmental Science chitosan drip erosion durability index unconfined compression strength wetting and drying |
| title | Sustainable assessment and carbon footprint analysis of polysaccharide biopolymer-amended soft soil as an alternate material to canal lining |
| title_full | Sustainable assessment and carbon footprint analysis of polysaccharide biopolymer-amended soft soil as an alternate material to canal lining |
| title_fullStr | Sustainable assessment and carbon footprint analysis of polysaccharide biopolymer-amended soft soil as an alternate material to canal lining |
| title_full_unstemmed | Sustainable assessment and carbon footprint analysis of polysaccharide biopolymer-amended soft soil as an alternate material to canal lining |
| title_short | Sustainable assessment and carbon footprint analysis of polysaccharide biopolymer-amended soft soil as an alternate material to canal lining |
| title_sort | sustainable assessment and carbon footprint analysis of polysaccharide biopolymer amended soft soil as an alternate material to canal lining |
| topic | chitosan drip erosion durability index unconfined compression strength wetting and drying |
| url | https://www.frontiersin.org/articles/10.3389/fenvs.2023.1214988/full |
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