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The potential clogging and filter performance of selected geotextiles with different soil types under unidirectional flow conditions in sub-soil drainage applications
Dissertation (MSc (Engineering Geology))--University of Pretoria, 2022.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2022
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| _version_ | 1867613491501727744 |
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| access_status_str | Open Access |
| author2 | Van Rooy, J.L. (Jan Louis) |
| author_browse | Van Rooy, J.L. (Jan Louis) |
| author_facet | Van Rooy, J.L. (Jan Louis) |
| collection | Thesis |
| dc_rights_str_mv | University of Pretoria |
| description | Dissertation (MSc (Engineering Geology))--University of Pretoria, 2022. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/87157 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:36:59.722Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/87157 The potential clogging and filter performance of selected geotextiles with different soil types under unidirectional flow conditions in sub-soil drainage applications Van Rooy, J.L. (Jan Louis) Dippenaar, Matthys Alois Mukwevho, Fhulufhelo Vincent Geotextile Retention Filtration Gradient ratio Permeability UCTD Natural and agricultural sciences theses SDG-06 Natural and agricultural sciences theses SDG-09 Natural and agricultural sciences theses SDG-11 Dissertation (MSc (Engineering Geology))--University of Pretoria, 2022. Non-woven and woven geotextiles have long been used as a cost effective solution in different applications such as separation, reinforcement, protection, filtration and drainage. One of the most common use of geotextiles is as filters in sub-soil drainage systems. The main function of a filter is to retain particles of the base soil whilst maintaining a good flow of water through the system. There’s still a lot of uncertainties concerning the long term performance of geotextile filters in filtration and drainage applications. However, there’s a lot of ongoing research to better understand the performance of these products. The purpose of this study is to determine the range of problematic soils in the particle size distribution graph and soil-geotextile compatibility of the different soils with selected geotextiles. In order to achieve the ultimate objective of the study, analysis of the permeability, gradient ratio, coefficient of uniformity and clogging potential of the soil-geotextile systems was achieved through the filtration compatibility test (Long Term Gradient Ratio test) of five different geotextiles against 3 soil types. The soil-geotextile systems were subjected to a maximum waterhead of 1420 mm for a maximum of 1008 hours or until the system has reached equilibrium. The results have shown that soils with high clay/silt fractions tend cause blocking, blinding, and clogging which can close most of the geotextile filter pores. Larger sand/gravel sized particles tend to form a filter bridge that hold back finer soil particles. Sandy gravel with bidim A2 and sandy gravel with bidim A4 were the overall best performers with overall gradient ratios of less than 1 which represents a more open filter. The gradient ratios of the other soil-geotextile combinations were higher than 1 which represents clogging and reduction in permeability. However, no geotextile was completely clogged by the soils. bs2026 MSc (Engineering Geology) SDG-06: Clean water and sanitation SDG-09: Industry, innovation and infrastructure SDG-11: Sustainable cities and communities 2022-09-09T13:19:36Z 2022-09-09T13:19:36Z 2023-04 2022 Dissertation * A2023 https://repository.up.ac.za/handle/2263/87157 en University of Pretoria 229 Pages PDF Soft Copy application/pdf University of Pretoria |
| spellingShingle | Geotextile Retention Filtration Gradient ratio Permeability UCTD Natural and agricultural sciences theses SDG-06 Natural and agricultural sciences theses SDG-09 Natural and agricultural sciences theses SDG-11 The potential clogging and filter performance of selected geotextiles with different soil types under unidirectional flow conditions in sub-soil drainage applications |
| title | The potential clogging and filter performance of selected geotextiles with different soil types under unidirectional flow conditions in sub-soil drainage applications |
| title_full | The potential clogging and filter performance of selected geotextiles with different soil types under unidirectional flow conditions in sub-soil drainage applications |
| title_fullStr | The potential clogging and filter performance of selected geotextiles with different soil types under unidirectional flow conditions in sub-soil drainage applications |
| title_full_unstemmed | The potential clogging and filter performance of selected geotextiles with different soil types under unidirectional flow conditions in sub-soil drainage applications |
| title_short | The potential clogging and filter performance of selected geotextiles with different soil types under unidirectional flow conditions in sub-soil drainage applications |
| title_sort | potential clogging and filter performance of selected geotextiles with different soil types under unidirectional flow conditions in sub soil drainage applications |
| topic | Geotextile Retention Filtration Gradient ratio Permeability UCTD Natural and agricultural sciences theses SDG-06 Natural and agricultural sciences theses SDG-09 Natural and agricultural sciences theses SDG-11 |
| url | https://repository.up.ac.za/handle/2263/87157 |