| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Bordoloi, Sanandam
Aalto University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (3/3 displayed)
- 2024Characterization of novel polysulfide polymer coated fly ash and its application in mitigating diffusion of contaminantscitations
- 2022Exploring the theoretical effects of landfill based microplastic accumulation on the hydro-mechanical properties of porous soil mediacitations
- 2022Hydraulic conductivity variation in compacted bentonite–fly ash mixes under constant-volume and free-swelling flow conditionscitations
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article
Hydraulic conductivity variation in compacted bentonite–fly ash mixes under constant-volume and free-swelling flow conditions
Abstract
<p>Compacted bentonite–sand (B–S) and bentonite–fly ash (B–FA) are established combinations for the construction of landfill liners. This study determined the upper and lower bounds of equilibrium hydraulic conductivity (k<sub>eq</sub>) of amended B under extended duration of flow. The k<sub>eq</sub> for constant-volume flow condition differed from free-swelling condition by more than two orders of magnitude due to the difference in geomaterial interaction, microstructural changes, and mineralization. Considering constant-volume and free-swelling condition, B–FA mix with class F and class C fulfilled the hydraulic conductivity criterion up to 70% and 30% amendment, respectively. The higher k<sub>eq</sub> observed for the B mixed with class C FA was attributed to the formation of porous calcium aluminium silicate hydrate gel and ettringite needle type minerals. The time taken to achieve equilibrium was inversely related to k<sub>eq</sub> by a power relationship. The data from this study were used to propose empirical relationships for estimating k<sub>eq</sub> (long-term) based on k obtained at 48 hours (short-term), plasticity and geomaterial type. The study reveals that FA can be used as an alternate for S as amendment material, and k<sub>eq</sub> based on free-swelling condition should be used for designing the liner.</p>