Abstract
Drinking water sludge is the aggregation of clay and organic compounds which is formed in flocculation and sedimentation process. This study focused on the decomposition of the bonding by flocculating agent and organic matter, and proposed a simplified method for the prediction of changes in shear strength caused by DWS decompositions. The changes in shear strength of DWS were investigated by triaxial compression tests. The specimens were produced using the DWS which was mainly decomposed by H2O2 solutions. As a result, volumetric strain became large in the large axial strain range, and the maximum deviator stress decreased concomitantly with the decrease in ignition loss. After the organic matter was decomposed until 1.38%, the internal friction angle decreased from approximately 38.8° to 37.6°. The changes of shear strength were related to the substantial period in geotechnical works such as road infrastructures. The decompositions of the mechanical bridging and organic matter were described based on diffusion-controlled Al leaching and aerobic biodegradation, respectively.
| Original language | English |
|---|---|
| Pages | 3271-3274 |
| Number of pages | 4 |
| Publication status | Published - 2013 Jan 1 |
| Externally published | Yes |
| Event | 18th International Conference on Soil Mechanics and Geotechnical Engineering, ICSMGE 2013 - Paris, France Duration: 2013 Sept 2 → 2013 Sept 6 |
Other
| Other | 18th International Conference on Soil Mechanics and Geotechnical Engineering, ICSMGE 2013 |
|---|---|
| Country/Territory | France |
| City | Paris |
| Period | 13/9/2 → 13/9/6 |
Keywords
- Aluminum
- Decomposition
- Leaching
- Organic matter
- Reuse
- Shear strength
- Sludge
- Waste
ASJC Scopus subject areas
- Geotechnical Engineering and Engineering Geology