Durability of alkali activated slag in a marine environment: Influence of alkali ion
Апстракт
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.
Кључне речи:
steel slag / seawater / sorptivity / bruciteИзвор:
Journal of the Serbian Chemical Society, 2018, 83, 10, 1143-1156Издавач:
- Srpsko hemijsko društvo, Beograd
DOI: 10.2298/JSC180328057N
ISSN: 0352-5139
WoS: 000448804500006
Scopus: 2-s2.0-85056222995
Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Nikolić, Irena AU - Tadić, Milena AU - Janković-Častvan, Ivona AU - Radmilović, Vuk AU - Radmilović, Velimir R. PY - 2018 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3939 AB - 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. PB - Srpsko hemijsko društvo, Beograd T2 - Journal of the Serbian Chemical Society T1 - Durability of alkali activated slag in a marine environment: Influence of alkali ion EP - 1156 IS - 10 SP - 1143 VL - 83 DO - 10.2298/JSC180328057N ER -
@article{ author = "Nikolić, Irena and Tadić, Milena and Janković-Častvan, Ivona and Radmilović, Vuk and Radmilović, Velimir R.", year = "2018", abstract = "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.", publisher = "Srpsko hemijsko društvo, Beograd", journal = "Journal of the Serbian Chemical Society", title = "Durability of alkali activated slag in a marine environment: Influence of alkali ion", pages = "1156-1143", number = "10", volume = "83", doi = "10.2298/JSC180328057N" }
Nikolić, I., Tadić, M., Janković-Častvan, I., Radmilović, V.,& Radmilović, V. R.. (2018). Durability of alkali activated slag in a marine environment: Influence of alkali ion. in Journal of the Serbian Chemical Society Srpsko hemijsko društvo, Beograd., 83(10), 1143-1156. https://doi.org/10.2298/JSC180328057N
Nikolić I, Tadić M, Janković-Častvan I, Radmilović V, Radmilović VR. Durability of alkali activated slag in a marine environment: Influence of alkali ion. in Journal of the Serbian Chemical Society. 2018;83(10):1143-1156. doi:10.2298/JSC180328057N .
Nikolić, Irena, Tadić, Milena, Janković-Častvan, Ivona, Radmilović, Vuk, Radmilović, Velimir R., "Durability of alkali activated slag in a marine environment: Influence of alkali ion" in Journal of the Serbian Chemical Society, 83, no. 10 (2018):1143-1156, https://doi.org/10.2298/JSC180328057N . .