External sulfate attack on alkali-activated fly ash-blast furnace slag composite
Samo za registrovane korisnike
2017
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
Reliable durability testing of alkali-activated binders, which might serve as a basis for the prediction of long-term field performance, is one of the main challenges towards broader commercial applications of AAB. This study investigated the influence of 5% Na2SO4 solution on mechanical and microstructural properties of alkali-activated binder based on fly ash and blast furnace slag (FA-BFS) composite. The influence of Na2SO4 solution was investigated during the period of 180 days and estimated by comparison with the reference samples simultaneously cured in a humid chamber and with the benchmark material CEM II. Strength, leaching (ICP-OES), pH, XRD, ATR-FTIR, and SEM/EDS analyses were performed. The Strength Loss Index was higher than 1 throughout the whole period of testing indicating strength increase during the exposure to sulfate attack rather than the loss of strength. Slower compressive strength development of the samples exposed to the sulfate solution in comparison with the ...reference samples was also observed. The exposure of alkali-activated binder to the sulfate solution led to a decrease in the Si/Al atomic ratio of binder matrix due to the leaching of Si, causing slower compressive strength development at the same time. The accelerated testing method used confirmed high resistance both of alkali-activated binder based on fly ash-blast furnace slag and CEM II to external sulfate attack and at the same time confirmed its ability to discriminate the resistance of different type of binders to sulfate aggressive environment.
Ključne reči:
Strength loss/gain index / Microstructure alteration / Fly ash / External sulfate attack / Blast furnace slag / Alkali-activated binder / Accelerated testIzvor:
Construction and Building Materials, 2017, 157, 737-747Izdavač:
- Elsevier Sci Ltd, Oxford
Finansiranje / projekti:
- Geopolimeri - Razvoj tehnologije za konverziju industrijskog otpada u funkcionalne materijale (RS-34026)
DOI: 10.1016/j.conbuildmat.2017.09.159
ISSN: 0950-0618
WoS: 000414106200073
Scopus: 2-s2.0-85030172154
Institucija/grupa
Institut za multidisciplinarna istraživanjaTY - JOUR AU - Džunuzović, Nataša AU - Komljenović, Miroslav M AU - Nikolić, Violeta AU - Ivanović, Tijana PY - 2017 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/1043 AB - Reliable durability testing of alkali-activated binders, which might serve as a basis for the prediction of long-term field performance, is one of the main challenges towards broader commercial applications of AAB. This study investigated the influence of 5% Na2SO4 solution on mechanical and microstructural properties of alkali-activated binder based on fly ash and blast furnace slag (FA-BFS) composite. The influence of Na2SO4 solution was investigated during the period of 180 days and estimated by comparison with the reference samples simultaneously cured in a humid chamber and with the benchmark material CEM II. Strength, leaching (ICP-OES), pH, XRD, ATR-FTIR, and SEM/EDS analyses were performed. The Strength Loss Index was higher than 1 throughout the whole period of testing indicating strength increase during the exposure to sulfate attack rather than the loss of strength. Slower compressive strength development of the samples exposed to the sulfate solution in comparison with the reference samples was also observed. The exposure of alkali-activated binder to the sulfate solution led to a decrease in the Si/Al atomic ratio of binder matrix due to the leaching of Si, causing slower compressive strength development at the same time. The accelerated testing method used confirmed high resistance both of alkali-activated binder based on fly ash-blast furnace slag and CEM II to external sulfate attack and at the same time confirmed its ability to discriminate the resistance of different type of binders to sulfate aggressive environment. PB - Elsevier Sci Ltd, Oxford T2 - Construction and Building Materials T1 - External sulfate attack on alkali-activated fly ash-blast furnace slag composite EP - 747 SP - 737 VL - 157 DO - 10.1016/j.conbuildmat.2017.09.159 ER -
@article{ author = "Džunuzović, Nataša and Komljenović, Miroslav M and Nikolić, Violeta and Ivanović, Tijana", year = "2017", abstract = "Reliable durability testing of alkali-activated binders, which might serve as a basis for the prediction of long-term field performance, is one of the main challenges towards broader commercial applications of AAB. This study investigated the influence of 5% Na2SO4 solution on mechanical and microstructural properties of alkali-activated binder based on fly ash and blast furnace slag (FA-BFS) composite. The influence of Na2SO4 solution was investigated during the period of 180 days and estimated by comparison with the reference samples simultaneously cured in a humid chamber and with the benchmark material CEM II. Strength, leaching (ICP-OES), pH, XRD, ATR-FTIR, and SEM/EDS analyses were performed. The Strength Loss Index was higher than 1 throughout the whole period of testing indicating strength increase during the exposure to sulfate attack rather than the loss of strength. Slower compressive strength development of the samples exposed to the sulfate solution in comparison with the reference samples was also observed. The exposure of alkali-activated binder to the sulfate solution led to a decrease in the Si/Al atomic ratio of binder matrix due to the leaching of Si, causing slower compressive strength development at the same time. The accelerated testing method used confirmed high resistance both of alkali-activated binder based on fly ash-blast furnace slag and CEM II to external sulfate attack and at the same time confirmed its ability to discriminate the resistance of different type of binders to sulfate aggressive environment.", publisher = "Elsevier Sci Ltd, Oxford", journal = "Construction and Building Materials", title = "External sulfate attack on alkali-activated fly ash-blast furnace slag composite", pages = "747-737", volume = "157", doi = "10.1016/j.conbuildmat.2017.09.159" }
Džunuzović, N., Komljenović, M. M., Nikolić, V.,& Ivanović, T.. (2017). External sulfate attack on alkali-activated fly ash-blast furnace slag composite. in Construction and Building Materials Elsevier Sci Ltd, Oxford., 157, 737-747. https://doi.org/10.1016/j.conbuildmat.2017.09.159
Džunuzović N, Komljenović MM, Nikolić V, Ivanović T. External sulfate attack on alkali-activated fly ash-blast furnace slag composite. in Construction and Building Materials. 2017;157:737-747. doi:10.1016/j.conbuildmat.2017.09.159 .
Džunuzović, Nataša, Komljenović, Miroslav M, Nikolić, Violeta, Ivanović, Tijana, "External sulfate attack on alkali-activated fly ash-blast furnace slag composite" in Construction and Building Materials, 157 (2017):737-747, https://doi.org/10.1016/j.conbuildmat.2017.09.159 . .