Investigating the Effect of Wood Ash–Lime Blend in the Stabilization of Reclaimed Asphalt Pavement for Road Construction.
Extremely large volumes of reclaimed asphalt pavement (RAP) aggregates are generated during pavement rehabilitation and reconstruction and disposed of along road alignments while large quantities of wood ash are generated from burning eucalyptus (eucalyptus grandis specie) logs under controlled comb...
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Kabale University
2025
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| Online Access: | http://hdl.handle.net/20.500.12493/2738 |
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| author | Byamugisha, Mark |
| author_facet | Byamugisha, Mark |
| author_sort | Byamugisha, Mark |
| collection | KAB-DR |
| description | Extremely large volumes of reclaimed asphalt pavement (RAP) aggregates are generated during pavement rehabilitation and reconstruction and disposed of along road alignments while large quantities of wood ash are generated from burning eucalyptus (eucalyptus grandis specie) logs under controlled combustion at 10000C. This paper presents the results of the laboratory evaluation of the characteristics of wood ash-lime stabilized RAP with a view to determining its suitability for use as highway pavement material in flexible pavement construction. The RAP-wood ash-lime mixtures were subjected to compaction tests to determine the compaction characteristics and California bearing ratio (CBR). Test results show that the properties of RAP improved with wood ash treatment. RAP was classified as A-2-4 using the AASHTO classification system and the general rating as sub-grade in accordance with AASHTO (1986) is excellent too good. The values of Maximum dry density (MDD) increased at 0% and 2% wood ash treatment and decreased furthermore with an increase in the percentage of wood ash-lime while the optimum moisture content (OMC) increased with an increase in wood ash-lime content in the RAP +wood ash-lime mixes. RAP samples were collected and mixed with wood ash and lime in varying percentage replacement of 0%, 2%, 4%, 6%, 8%, and 10% by sample weight. Geotechnical properties such as particle size according to BS 1377 Part 2 and Part 4 standards, Atterberg limit ASTM D3282 standards, unconfined compressive strength test (UCS), compaction test, and California bearing ratio (CBR) test were carried out on both native and stabilized soil samples as per AASHTO classification. The Methodology presents the materials including water, soil & wood ash, and methods which include; Liquid limit, Plasticity index, MDD, UCS, CBR that were undertaken to achieve the desired aims and objectives of the project. |
| format | Thesis |
| id | oai:idr.kab.ac.ug:20.500.12493-2738 |
| institution | KAB-DR |
| language | English |
| publishDate | 2025 |
| publisher | Kabale University |
| record_format | dspace |
| spelling | oai:idr.kab.ac.ug:20.500.12493-27382025-01-14T00:00:38Z Investigating the Effect of Wood Ash–Lime Blend in the Stabilization of Reclaimed Asphalt Pavement for Road Construction. Byamugisha, Mark Investigating Effect Wood Ash–Lime Blend Stabilization Reclaimed Asphalt Pavement Road Construction Extremely large volumes of reclaimed asphalt pavement (RAP) aggregates are generated during pavement rehabilitation and reconstruction and disposed of along road alignments while large quantities of wood ash are generated from burning eucalyptus (eucalyptus grandis specie) logs under controlled combustion at 10000C. This paper presents the results of the laboratory evaluation of the characteristics of wood ash-lime stabilized RAP with a view to determining its suitability for use as highway pavement material in flexible pavement construction. The RAP-wood ash-lime mixtures were subjected to compaction tests to determine the compaction characteristics and California bearing ratio (CBR). Test results show that the properties of RAP improved with wood ash treatment. RAP was classified as A-2-4 using the AASHTO classification system and the general rating as sub-grade in accordance with AASHTO (1986) is excellent too good. The values of Maximum dry density (MDD) increased at 0% and 2% wood ash treatment and decreased furthermore with an increase in the percentage of wood ash-lime while the optimum moisture content (OMC) increased with an increase in wood ash-lime content in the RAP +wood ash-lime mixes. RAP samples were collected and mixed with wood ash and lime in varying percentage replacement of 0%, 2%, 4%, 6%, 8%, and 10% by sample weight. Geotechnical properties such as particle size according to BS 1377 Part 2 and Part 4 standards, Atterberg limit ASTM D3282 standards, unconfined compressive strength test (UCS), compaction test, and California bearing ratio (CBR) test were carried out on both native and stabilized soil samples as per AASHTO classification. The Methodology presents the materials including water, soil & wood ash, and methods which include; Liquid limit, Plasticity index, MDD, UCS, CBR that were undertaken to achieve the desired aims and objectives of the project. 2025-01-13T12:30:52Z 2025-01-13T12:30:52Z 2024 Thesis Byamugisha, Mark (2024). Investigating the Effect of Wood Ash–Lime Blend in the Stabilization of Reclaimed Asphalt Pavement for Road Construction. Kabale: Kabale University. http://hdl.handle.net/20.500.12493/2738 en Attribution-NonCommercial-NoDerivs 3.0 United States http://creativecommons.org/licenses/by-nc-nd/3.0/us/ application/pdf Kabale University |
| spellingShingle | Investigating Effect Wood Ash–Lime Blend Stabilization Reclaimed Asphalt Pavement Road Construction Byamugisha, Mark Investigating the Effect of Wood Ash–Lime Blend in the Stabilization of Reclaimed Asphalt Pavement for Road Construction. |
| title | Investigating the Effect of Wood Ash–Lime Blend in the Stabilization of Reclaimed Asphalt Pavement for Road Construction. |
| title_full | Investigating the Effect of Wood Ash–Lime Blend in the Stabilization of Reclaimed Asphalt Pavement for Road Construction. |
| title_fullStr | Investigating the Effect of Wood Ash–Lime Blend in the Stabilization of Reclaimed Asphalt Pavement for Road Construction. |
| title_full_unstemmed | Investigating the Effect of Wood Ash–Lime Blend in the Stabilization of Reclaimed Asphalt Pavement for Road Construction. |
| title_short | Investigating the Effect of Wood Ash–Lime Blend in the Stabilization of Reclaimed Asphalt Pavement for Road Construction. |
| title_sort | investigating the effect of wood ash lime blend in the stabilization of reclaimed asphalt pavement for road construction |
| topic | Investigating Effect Wood Ash–Lime Blend Stabilization Reclaimed Asphalt Pavement Road Construction |
| url | http://hdl.handle.net/20.500.12493/2738 |
| work_keys_str_mv | AT byamugishamark investigatingtheeffectofwoodashlimeblendinthestabilizationofreclaimedasphaltpavementforroadconstruction |