Filtration Resistance of Hardening Slurries with Fluidized Fly-Ashes under Sulphate Aggression
The research paper presents the results of hydraulic conductivity, pore structure, phase composition and microstructural tests of hardening slurries prepared using Portland cement, bentonite, water and fluidized-bed ashes coming from hard coal and lignite combustion. The slurries were subjected to l...
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| Format: | Article |
| Language: | English |
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Polish Academy of Sciences
2020-12-01
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| Series: | Archives of Civil Engineering |
| Subjects: | |
| Online Access: | https://journals.pan.pl/Content/118218/PDF/24_ACE-00092%20poprawiony-ok_B5.pdf |
| _version_ | 1818489327403925504 |
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| author | Paweł Falaciński |
| author_facet | Paweł Falaciński |
| author_sort | Paweł Falaciński |
| collection | DOAJ |
| description | The research paper presents the results of hydraulic conductivity, pore structure, phase composition and microstructural tests of hardening slurries prepared using Portland cement, bentonite, water and fluidized-bed ashes coming from hard coal and lignite combustion. The slurries were subjected to long-term (210 days) exposure to the filtering action of an environment strongly aggressive to a cement binder. A sulphate solution 2- with sodium content of SO4 2- = 6700 mg/l was applied, which modelled sulphate aggression. The comparative base were samples subjected to filtration in tap water (neutral environment). The test covered dependencies between hydraulic conductivity k10 (filtration coefficient) and the parameters characterizing porous structure in the slurry, as well as the impact of an aggressive medium on slurry tightness (its porosity and hydraulic conductivity). Changes in the phase composition and slurry microstructure were analysed in terms of its corrosion resistance to the action of sulphate aggression. Observations from other researchers have been confirmed that the use of fluidized fly-ash addition has a positive effect on increasing the resistance of cement matrix exposed to sulphate aggressiveness. |
| first_indexed | 2024-12-10T17:02:33Z |
| format | Article |
| id | doaj.art-8b2929abc263416a829f1828dc723b71 |
| institution | Directory Open Access Journal |
| issn | 2300-3103 |
| language | English |
| last_indexed | 2024-12-10T17:02:33Z |
| publishDate | 2020-12-01 |
| publisher | Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Civil Engineering |
| spelling | doaj.art-8b2929abc263416a829f1828dc723b712022-12-22T01:40:32ZengPolish Academy of SciencesArchives of Civil Engineering2300-31032020-12-01Vol. 66No 4413428https://doi.org/10.24425/ace.2020.135229Filtration Resistance of Hardening Slurries with Fluidized Fly-Ashes under Sulphate AggressionPaweł Falacińskihttps://orcid.org/0000-0001-7090-5233The research paper presents the results of hydraulic conductivity, pore structure, phase composition and microstructural tests of hardening slurries prepared using Portland cement, bentonite, water and fluidized-bed ashes coming from hard coal and lignite combustion. The slurries were subjected to long-term (210 days) exposure to the filtering action of an environment strongly aggressive to a cement binder. A sulphate solution 2- with sodium content of SO4 2- = 6700 mg/l was applied, which modelled sulphate aggression. The comparative base were samples subjected to filtration in tap water (neutral environment). The test covered dependencies between hydraulic conductivity k10 (filtration coefficient) and the parameters characterizing porous structure in the slurry, as well as the impact of an aggressive medium on slurry tightness (its porosity and hydraulic conductivity). Changes in the phase composition and slurry microstructure were analysed in terms of its corrosion resistance to the action of sulphate aggression. Observations from other researchers have been confirmed that the use of fluidized fly-ash addition has a positive effect on increasing the resistance of cement matrix exposed to sulphate aggressiveness.https://journals.pan.pl/Content/118218/PDF/24_ACE-00092%20poprawiony-ok_B5.pdfhardening slurriescut-off wallssulphate aggressionfluidal fly-ashescircular economy |
| spellingShingle | Paweł Falaciński Filtration Resistance of Hardening Slurries with Fluidized Fly-Ashes under Sulphate Aggression Archives of Civil Engineering hardening slurries cut-off walls sulphate aggression fluidal fly-ashes circular economy |
| title | Filtration Resistance of Hardening Slurries with Fluidized Fly-Ashes under Sulphate Aggression |
| title_full | Filtration Resistance of Hardening Slurries with Fluidized Fly-Ashes under Sulphate Aggression |
| title_fullStr | Filtration Resistance of Hardening Slurries with Fluidized Fly-Ashes under Sulphate Aggression |
| title_full_unstemmed | Filtration Resistance of Hardening Slurries with Fluidized Fly-Ashes under Sulphate Aggression |
| title_short | Filtration Resistance of Hardening Slurries with Fluidized Fly-Ashes under Sulphate Aggression |
| title_sort | filtration resistance of hardening slurries with fluidized fly ashes under sulphate aggression |
| topic | hardening slurries cut-off walls sulphate aggression fluidal fly-ashes circular economy |
| url | https://journals.pan.pl/Content/118218/PDF/24_ACE-00092%20poprawiony-ok_B5.pdf |
| work_keys_str_mv | AT pawełfalacinski filtrationresistanceofhardeningslurrieswithfluidizedflyashesundersulphateaggression |