Modified residual soil for the fine-grained layer of capillary barriers
[THIS THESIS CONSISTS OF TWO (2) PARTS – THIS IS PART 1]. Capillary barrier, which is commonly defined as an earthen cover system consisting of a fine-grained soil overlying coarse-grained soil, has potential to be used as a slope protection technique. The contrast in hydraulic properties of the fin...
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| Format: | Thesis |
| Language: | English |
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2008
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| Online Access: | https://hdl.handle.net/10356/11833 |
| _version_ | 1811690592887898112 |
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| author | I Gbe Budi Indrawan |
| author2 | Harianto Rahardjo |
| author_facet | Harianto Rahardjo I Gbe Budi Indrawan |
| author_sort | I Gbe Budi Indrawan |
| collection | NTU |
| description | [THIS THESIS CONSISTS OF TWO (2) PARTS – THIS IS PART 1]. Capillary barrier, which is commonly defined as an earthen cover system consisting of a fine-grained soil overlying coarse-grained soil, has potential to be used as a slope protection technique. The contrast in hydraulic properties of the fine-grained layer and coarse-grained layer under unsaturated conditions impedes the downward water movement into the underlying protected system as demonstrated in this study. The Bukit Timah residual soil has been considered to be a suitable material for the fine-grained layer of capillary barrier system. Although residual soils are abundant in Singapore, it has high fine contents that cause the residual soil to have a low permeability and high shrinkage characteristics upon drying. In order to improve the hydraulic properties and the volumetric shrinkage characteristics, the residual soil was mixed with coarse-grained contents (i.e., gravelly sand or medium sand) or lime at different percentages. Results of the laboratory tests showed that the saturated permeabilities of the residual soil-gravelly sand mixtures and the residual soil-medium sand mixtures increased with the increase in the coarse-grained contents, while the saturated permeabilities of the residual soil-lime mixtures decreased with the increase in the lime percentages. The air-entry values of the soil-water characteristic curves (SWCCs) of the residual soil-gravelly sand mixtures and the residual soil-medium sand mixtures decreased with the increase in the coarse-grained contents and increased with the increase in the lime percentages. The permeability functions of the soil mixtures became steeper with the increase in the percentages of coarse-grained content and lime. |
| first_indexed | 2024-10-01T06:06:27Z |
| format | Thesis |
| id | ntu-10356/11833 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:06:27Z |
| publishDate | 2008 |
| record_format | dspace |
| spelling | ntu-10356/118332023-03-03T19:24:50Z Modified residual soil for the fine-grained layer of capillary barriers I Gbe Budi Indrawan Harianto Rahardjo School of Civil and Environmental Engineering DRNTU::Engineering::Civil engineering::Geotechnical [THIS THESIS CONSISTS OF TWO (2) PARTS – THIS IS PART 1]. Capillary barrier, which is commonly defined as an earthen cover system consisting of a fine-grained soil overlying coarse-grained soil, has potential to be used as a slope protection technique. The contrast in hydraulic properties of the fine-grained layer and coarse-grained layer under unsaturated conditions impedes the downward water movement into the underlying protected system as demonstrated in this study. The Bukit Timah residual soil has been considered to be a suitable material for the fine-grained layer of capillary barrier system. Although residual soils are abundant in Singapore, it has high fine contents that cause the residual soil to have a low permeability and high shrinkage characteristics upon drying. In order to improve the hydraulic properties and the volumetric shrinkage characteristics, the residual soil was mixed with coarse-grained contents (i.e., gravelly sand or medium sand) or lime at different percentages. Results of the laboratory tests showed that the saturated permeabilities of the residual soil-gravelly sand mixtures and the residual soil-medium sand mixtures increased with the increase in the coarse-grained contents, while the saturated permeabilities of the residual soil-lime mixtures decreased with the increase in the lime percentages. The air-entry values of the soil-water characteristic curves (SWCCs) of the residual soil-gravelly sand mixtures and the residual soil-medium sand mixtures decreased with the increase in the coarse-grained contents and increased with the increase in the lime percentages. The permeability functions of the soil mixtures became steeper with the increase in the percentages of coarse-grained content and lime. MASTER OF ENGINEERING (CEE) 2008-09-25T06:30:03Z 2008-09-25T06:30:03Z 2005 2005 Thesis Indrawan, I. G. B. (2005). Modified residual soil for the fine-grained layer of capillary barriers. Master’s thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/11833 10.32657/10356/11833 en Nanyang Technological University 160 p. application/pdf application/pdf |
| spellingShingle | DRNTU::Engineering::Civil engineering::Geotechnical I Gbe Budi Indrawan Modified residual soil for the fine-grained layer of capillary barriers |
| title | Modified residual soil for the fine-grained layer of capillary barriers |
| title_full | Modified residual soil for the fine-grained layer of capillary barriers |
| title_fullStr | Modified residual soil for the fine-grained layer of capillary barriers |
| title_full_unstemmed | Modified residual soil for the fine-grained layer of capillary barriers |
| title_short | Modified residual soil for the fine-grained layer of capillary barriers |
| title_sort | modified residual soil for the fine grained layer of capillary barriers |
| topic | DRNTU::Engineering::Civil engineering::Geotechnical |
| url | https://hdl.handle.net/10356/11833 |
| work_keys_str_mv | AT igbebudiindrawan modifiedresidualsoilforthefinegrainedlayerofcapillarybarriers |