Impact of sodium sulfate solution on mechanical properties and structure of fly ash based geopolymers
Само за регистроване кориснике
2015
Аутори
Baščarević, ZvezdanaKomljenović, Miroslav
Miladinović, Zoran P.
Nikolić, Violeta
Marjanović, Nataša
Petrović, Rada
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
In this paper, geopolymers based on two different fly ash samples were exposed to sodium sulfate (Na2SO4) solution (50 g/l) over a period of 365 days. It was found that sulfate solution attack caused a small decrease in strength of geopolymer mortars. Analysis of the Na2SO4 solutions by optical emission spectroscopy indicated that exposing of the geopolymer samples to the Na2SO4 solution had caused leaching of one of the elements of the aluminosilicate gel, silicon. Mineralogical analyses of geopolymer samples did not show formation of any new phases due to a reaction with sulfate ions. Changes in aluminosilicate geopolymer gel due to sulfate attack were investigated by electron microscopy and nuclear magnetic resonance. It was found that treatment of geopolymer samples with the sulfate solution caused breaking of -Si-O-Si- bonds in aluminosilicate gel structure. Breaking of the -Si-O-Si- bonds and leaching of Si were consequences of the increase in the pH value of sulfate solution dur...ing testing.
Кључне речи:
Geopolymer / Fly ash / Durability / Sulfate attackИзвор:
Materials and Structures, 2015, 48, 3, 683-697Издавач:
- Springer, Dordrecht
Финансирање / пројекти:
- Геополимери - Развој технологије за конверзију индустријског отпада у функционалне материјале (RS-MESTD-Technological Development (TD or TR)-34026)
DOI: 10.1617/s11527-014-0325-4
ISSN: 1359-5997
WoS: 000349443600015
Scopus: 2-s2.0-84922337626
Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Baščarević, Zvezdana AU - Komljenović, Miroslav AU - Miladinović, Zoran P. AU - Nikolić, Violeta AU - Marjanović, Nataša AU - Petrović, Rada PY - 2015 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3039 AB - In this paper, geopolymers based on two different fly ash samples were exposed to sodium sulfate (Na2SO4) solution (50 g/l) over a period of 365 days. It was found that sulfate solution attack caused a small decrease in strength of geopolymer mortars. Analysis of the Na2SO4 solutions by optical emission spectroscopy indicated that exposing of the geopolymer samples to the Na2SO4 solution had caused leaching of one of the elements of the aluminosilicate gel, silicon. Mineralogical analyses of geopolymer samples did not show formation of any new phases due to a reaction with sulfate ions. Changes in aluminosilicate geopolymer gel due to sulfate attack were investigated by electron microscopy and nuclear magnetic resonance. It was found that treatment of geopolymer samples with the sulfate solution caused breaking of -Si-O-Si- bonds in aluminosilicate gel structure. Breaking of the -Si-O-Si- bonds and leaching of Si were consequences of the increase in the pH value of sulfate solution during testing. PB - Springer, Dordrecht T2 - Materials and Structures T1 - Impact of sodium sulfate solution on mechanical properties and structure of fly ash based geopolymers EP - 697 IS - 3 SP - 683 VL - 48 DO - 10.1617/s11527-014-0325-4 ER -
@article{ author = "Baščarević, Zvezdana and Komljenović, Miroslav and Miladinović, Zoran P. and Nikolić, Violeta and Marjanović, Nataša and Petrović, Rada", year = "2015", abstract = "In this paper, geopolymers based on two different fly ash samples were exposed to sodium sulfate (Na2SO4) solution (50 g/l) over a period of 365 days. It was found that sulfate solution attack caused a small decrease in strength of geopolymer mortars. Analysis of the Na2SO4 solutions by optical emission spectroscopy indicated that exposing of the geopolymer samples to the Na2SO4 solution had caused leaching of one of the elements of the aluminosilicate gel, silicon. Mineralogical analyses of geopolymer samples did not show formation of any new phases due to a reaction with sulfate ions. Changes in aluminosilicate geopolymer gel due to sulfate attack were investigated by electron microscopy and nuclear magnetic resonance. It was found that treatment of geopolymer samples with the sulfate solution caused breaking of -Si-O-Si- bonds in aluminosilicate gel structure. Breaking of the -Si-O-Si- bonds and leaching of Si were consequences of the increase in the pH value of sulfate solution during testing.", publisher = "Springer, Dordrecht", journal = "Materials and Structures", title = "Impact of sodium sulfate solution on mechanical properties and structure of fly ash based geopolymers", pages = "697-683", number = "3", volume = "48", doi = "10.1617/s11527-014-0325-4" }
Baščarević, Z., Komljenović, M., Miladinović, Z. P., Nikolić, V., Marjanović, N.,& Petrović, R.. (2015). Impact of sodium sulfate solution on mechanical properties and structure of fly ash based geopolymers. in Materials and Structures Springer, Dordrecht., 48(3), 683-697. https://doi.org/10.1617/s11527-014-0325-4
Baščarević Z, Komljenović M, Miladinović ZP, Nikolić V, Marjanović N, Petrović R. Impact of sodium sulfate solution on mechanical properties and structure of fly ash based geopolymers. in Materials and Structures. 2015;48(3):683-697. doi:10.1617/s11527-014-0325-4 .
Baščarević, Zvezdana, Komljenović, Miroslav, Miladinović, Zoran P., Nikolić, Violeta, Marjanović, Nataša, Petrović, Rada, "Impact of sodium sulfate solution on mechanical properties and structure of fly ash based geopolymers" in Materials and Structures, 48, no. 3 (2015):683-697, https://doi.org/10.1617/s11527-014-0325-4 . .