Investigating the Use of Crushed Granite Stone and Ash From Waste Incineration to Stabilize Expansive Subgrade Soil
| dc.contributor.author | Peter Ashaba | |
| dc.date.accessioned | 2024-04-19T12:37:51Z | |
| dc.date.available | 2024-04-19T12:37:51Z | |
| dc.date.issued | 2024-04-15 | |
| dc.description.abstract | Expansive soils pose significant challenges in civil engineering projects due to their high plasticity index (PI) and low California Bearing Ratio (CBR) values, often failing to meet standard requirements. This study investigates the effectiveness of locally available materials, crushed granite stone (CGS), and waste incineration ash (WIA), in stabilizing expansive soils in Kawanda Town Council, Wakiso District. Initial soil tests revealed unsatisfactory CBR and PI values. Subsequent addition of 30% CGS resulted in a notable increase in CBR values, meeting Ministry of Works and Transport (MoWT) standards. However, the PI value remained above the permissible limit at 26.2%. To further enhance soil stabilization, varying percentages of WIA (0%, 2%, 4%, 6%, and 8%) were introduced while maintaining the 30% CGS ratio. The results demonstrated a decrease in PI values with increasing WIA content, reaching a minimum of 22.3% at 8% WIA. Optimization analysis revealed that a combination of 30% CGS and 8% WIA yielded the most favourable outcomes, achieving optimal values for CBR, Maximum Dry Density (MDD) and Optimum Moisture Content (OMC), Plasticity Index (PI), and Liquid Limit (LL). This finding underscores the efficacy of using locally available materials for stabilizing expansive soils, offering a sustainable solution for civil engineering projects in the region. | |
| dc.identifier.uri | https://hdl.handle.net/20.500.12311/1383 | |
| dc.language.iso | en | |
| dc.title | Investigating the Use of Crushed Granite Stone and Ash From Waste Incineration to Stabilize Expansive Subgrade Soil | |
| dc.type | Project report | |
| dcterms.publisher | Uganda Christian University |