Durability of alkali activated slag in a marine environment: Influence of alkali ion
The durability of alkali-activated steel electric arc furnace slag (EAFS) in a marine environment was evaluated with respect to the chemical composition of the alkaline activator. Two different alkaline activators have been used: a mixture of NaOH and Na2SiO3 solutions (Na-activator), as well as a m...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Serbian Chemical Society
2018-01-01
|
| Series: | Journal of the Serbian Chemical Society |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0352-5139/2018/0352-51391800057N.pdf |
| _version_ | 1811277763381821440 |
|---|---|
| author | Nikolić Irena Tadić Milena Janković-Častvan Ivona Radmilović Vuk V. Radmilović Velimir R. |
| author_facet | Nikolić Irena Tadić Milena Janković-Častvan Ivona Radmilović Vuk V. Radmilović Velimir R. |
| author_sort | Nikolić Irena |
| collection | DOAJ |
| description | The durability of alkali-activated steel electric arc furnace slag (EAFS) in a marine environment was evaluated with respect to the chemical composition of the alkaline activator. Two different alkaline activators have been used: a mixture of NaOH and Na2SiO3 solutions (Na-activator), as well as a mixture of KOH and K2SiO3 solutions (K-activator). The obtained results gave the insight into the influence of alkaline activator chemistry on the compressive strength and durability of alkali-activated slag (AAS), which was exposed to the damaging seawater environment. The porosity of AAS was found to be the most important factor with regards to the strength and durability of these materials in marine environment. Sodium based alkali-activated slag (Na-AAS) displayed lower porosity and higher compressive strength compared to potassium based AAS (K- -AAS). Lower porosity and thus a lower rate of water uptake by AAS matrix, i.e., the lower sorptivity was exhibited by the Na-AAS when compared to K-AAS. Hence, Na-AAS exhibited better durability in a marine environment. |
| first_indexed | 2024-04-13T00:22:41Z |
| format | Article |
| id | doaj.art-acc9f4d663374ba99bf43e6e75385cea |
| institution | Directory Open Access Journal |
| issn | 0352-5139 1820-7421 |
| language | English |
| last_indexed | 2024-04-13T00:22:41Z |
| publishDate | 2018-01-01 |
| publisher | Serbian Chemical Society |
| record_format | Article |
| series | Journal of the Serbian Chemical Society |
| spelling | doaj.art-acc9f4d663374ba99bf43e6e75385cea2022-12-22T03:10:43ZengSerbian Chemical SocietyJournal of the Serbian Chemical Society0352-51391820-74212018-01-0183101143115610.2298/JSC180328057N0352-51391800057NDurability of alkali activated slag in a marine environment: Influence of alkali ionNikolić Irena0Tadić Milena1Janković-Častvan Ivona2Radmilović Vuk V.3Radmilović Velimir R.4University of Montenegro, Faculty of Metallurgy and Technology, Podgorica, MontenegroUniversity of Montenegro, Faculty of Metallurgy and Technology, Podgorica, MontenegroFaculty of Technology and Metallurgy, BelgradeFaculty of Technology and Metallurgy, Innovation Center, BelgradeSerbian Academy of Sciences and Arts, BelgradeThe durability of alkali-activated steel electric arc furnace slag (EAFS) in a marine environment was evaluated with respect to the chemical composition of the alkaline activator. Two different alkaline activators have been used: a mixture of NaOH and Na2SiO3 solutions (Na-activator), as well as a mixture of KOH and K2SiO3 solutions (K-activator). The obtained results gave the insight into the influence of alkaline activator chemistry on the compressive strength and durability of alkali-activated slag (AAS), which was exposed to the damaging seawater environment. The porosity of AAS was found to be the most important factor with regards to the strength and durability of these materials in marine environment. Sodium based alkali-activated slag (Na-AAS) displayed lower porosity and higher compressive strength compared to potassium based AAS (K- -AAS). Lower porosity and thus a lower rate of water uptake by AAS matrix, i.e., the lower sorptivity was exhibited by the Na-AAS when compared to K-AAS. Hence, Na-AAS exhibited better durability in a marine environment.http://www.doiserbia.nb.rs/img/doi/0352-5139/2018/0352-51391800057N.pdfsteel slagseawatersorptivitybrucite |
| spellingShingle | Nikolić Irena Tadić Milena Janković-Častvan Ivona Radmilović Vuk V. Radmilović Velimir R. Durability of alkali activated slag in a marine environment: Influence of alkali ion Journal of the Serbian Chemical Society steel slag seawater sorptivity brucite |
| title | Durability of alkali activated slag in a marine environment: Influence of alkali ion |
| title_full | Durability of alkali activated slag in a marine environment: Influence of alkali ion |
| title_fullStr | Durability of alkali activated slag in a marine environment: Influence of alkali ion |
| title_full_unstemmed | Durability of alkali activated slag in a marine environment: Influence of alkali ion |
| title_short | Durability of alkali activated slag in a marine environment: Influence of alkali ion |
| title_sort | durability of alkali activated slag in a marine environment influence of alkali ion |
| topic | steel slag seawater sorptivity brucite |
| url | http://www.doiserbia.nb.rs/img/doi/0352-5139/2018/0352-51391800057N.pdf |
| work_keys_str_mv | AT nikolicirena durabilityofalkaliactivatedslaginamarineenvironmentinfluenceofalkaliion AT tadicmilena durabilityofalkaliactivatedslaginamarineenvironmentinfluenceofalkaliion AT jankoviccastvanivona durabilityofalkaliactivatedslaginamarineenvironmentinfluenceofalkaliion AT radmilovicvukv durabilityofalkaliactivatedslaginamarineenvironmentinfluenceofalkaliion AT radmilovicvelimirr durabilityofalkaliactivatedslaginamarineenvironmentinfluenceofalkaliion |