Effect of two activation methods on mechanical properties of high volume fly ash binders
Само за регистроване кориснике
2022
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
In this work, the effects of mechanical and chemical activation, as well as their combination, on the mechanical properties of high volume fly ash (HVFA) binders were investigated. Mechanical activation was conducted by grinding fly ash (FA) in a planetary ball mill. It resulted in drastic particle size reduction and increase in specific surface area of the FA. Morphology of FA particles, examined by scanning electron microscope, was also changed. The chemical activation was carried out by adding sodium sulfate to the dry mass of the binder. Effects of the activation methods on mechanical properties of the resulting binders were examined by determining setting time and compressive strength of HVFA mortars. The results showed that both activation methods lead to significant decrease in setting time and increase in early compressive strength, especially when combination of both of the activation methods was applied. Thus, properties of HVFA binders that have been limiting their use in th...e construction industry, i.e. long setting time and low early strength, were improved by using mechanical and chemical activation.
Кључне речи:
fly ash / mechanical activation / chemical activation / high volume fly ashИзвор:
6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia, 2022, 89-Издавач:
- Institut za multidisciplinarna istraživanja
Финансирање / пројекти:
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200053 (Универзитет у Београду, Институт за мултидисциплинарна истраживања) (RS-MESTD-inst-2020-200053)
Институција/група
Institut za multidisciplinarna istraživanjaTY - CONF AU - Rakić, Jelena AU - Baščarević, Zvezdana PY - 2022 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/1734 AB - In this work, the effects of mechanical and chemical activation, as well as their combination, on the mechanical properties of high volume fly ash (HVFA) binders were investigated. Mechanical activation was conducted by grinding fly ash (FA) in a planetary ball mill. It resulted in drastic particle size reduction and increase in specific surface area of the FA. Morphology of FA particles, examined by scanning electron microscope, was also changed. The chemical activation was carried out by adding sodium sulfate to the dry mass of the binder. Effects of the activation methods on mechanical properties of the resulting binders were examined by determining setting time and compressive strength of HVFA mortars. The results showed that both activation methods lead to significant decrease in setting time and increase in early compressive strength, especially when combination of both of the activation methods was applied. Thus, properties of HVFA binders that have been limiting their use in the construction industry, i.e. long setting time and low early strength, were improved by using mechanical and chemical activation. PB - Institut za multidisciplinarna istraživanja C3 - 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia T1 - Effect of two activation methods on mechanical properties of high volume fly ash binders SP - 89 UR - https://hdl.handle.net/21.15107/rcub_rimsi_1734 ER -
@conference{ author = "Rakić, Jelena and Baščarević, Zvezdana", year = "2022", abstract = "In this work, the effects of mechanical and chemical activation, as well as their combination, on the mechanical properties of high volume fly ash (HVFA) binders were investigated. Mechanical activation was conducted by grinding fly ash (FA) in a planetary ball mill. It resulted in drastic particle size reduction and increase in specific surface area of the FA. Morphology of FA particles, examined by scanning electron microscope, was also changed. The chemical activation was carried out by adding sodium sulfate to the dry mass of the binder. Effects of the activation methods on mechanical properties of the resulting binders were examined by determining setting time and compressive strength of HVFA mortars. The results showed that both activation methods lead to significant decrease in setting time and increase in early compressive strength, especially when combination of both of the activation methods was applied. Thus, properties of HVFA binders that have been limiting their use in the construction industry, i.e. long setting time and low early strength, were improved by using mechanical and chemical activation.", publisher = "Institut za multidisciplinarna istraživanja", journal = "6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia", title = "Effect of two activation methods on mechanical properties of high volume fly ash binders", pages = "89", url = "https://hdl.handle.net/21.15107/rcub_rimsi_1734" }
Rakić, J.,& Baščarević, Z.. (2022). Effect of two activation methods on mechanical properties of high volume fly ash binders. in 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia Institut za multidisciplinarna istraživanja., 89. https://hdl.handle.net/21.15107/rcub_rimsi_1734
Rakić J, Baščarević Z. Effect of two activation methods on mechanical properties of high volume fly ash binders. in 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia. 2022;:89. https://hdl.handle.net/21.15107/rcub_rimsi_1734 .
Rakić, Jelena, Baščarević, Zvezdana, "Effect of two activation methods on mechanical properties of high volume fly ash binders" in 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia (2022):89, https://hdl.handle.net/21.15107/rcub_rimsi_1734 .