Abstract
This research aims to understand the erodibility of Cement-Bentonite Barrier (CBB) using Hole Erosion Test (HET). Past studies on CBB erodibility did not provide adequate characterisa-tion mainly due to method and apparatus used in the testing. Two types of CBB mixes cured for 7, 30 and 90 days investigated in the study: CBB with Fly Ash (FA) and/or ground granulated blast furnace (GGBS). Two key parameters were used to evaluate CBB erodibility: hydraulic shear stress and erosion rate. It was discovered that the improvement of the erosion resistance of CBB was dependent on the curing duration and material mixes. The critical hydraulic shear stress increased and erosion rate decreased with curing time. The critical hydraulic shear stress was higher and the erosion rate was lower for CBB material containing GGBS than PFA. The improvement rate of the erosion resistance was more significant at the early stage of curing than the later stage.
| Original language | English |
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| Title of host publication | Scour and Erosion IX - Proceedings of the 9th International Conference on Scour and Erosion, ICSE 2018 |
| Editors | Yeh Keh-Chia |
| Publisher | CRC Press/Balkema |
| Pages | 103-109 |
| Number of pages | 7 |
| ISBN (Electronic) | 9780429020940 |
| ISBN (Print) | 9780367074678 |
| Publication status | Published - 10 Oct 2018 |
| Event | 9th International Conference on Scour and Erosion, ICSE 2018 - Taipei, Taiwan, Province of China Duration: 5 Nov 2018 → 8 Nov 2018 |
Conference
| Conference | 9th International Conference on Scour and Erosion, ICSE 2018 |
|---|---|
| Country/Territory | Taiwan, Province of China |
| City | Taipei |
| Period | 5/11/18 → 8/11/18 |
ASJC Scopus subject areas
- Water Science and Technology
- Ocean Engineering
- Environmental Engineering