Influence of Fly Ash as Cement Substitution on Accelerated and Natural Carbonation of Concrete
Само за регистроване кориснике
2023
Аутори
Carević, VedranRadević, Aleksandar
Ignjatović, Ivan
Остала ауторства
Jędrzejewska, AgnieszkaKanavaris, Fragkoulis
Azenha, Miguel
Benboudjema, Farid
Schlicke, Dirk
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
The use of fly ash (FA) for the production of new concrete seems to be a promising solution for “greening” of construction industry. However, re-placement of cement with supplementary cementitious materials such as fly ash influences concrete performance especially in terms of durability. One of major durability problems worldwide is carbonation-induced corrosion, given that a large number of infrastructural objects are exposed to a CO2-rich environment. The objective of this research was to analyse the influence of cement substitution level on accelerated and natural carbonation of concrete. Experimental program considered testing of 10 concrete mixtures selected in two groups – with water to binder ratio of 0,5 (400 kg/m3 of binders) and 0,6 (300 kg/m3 of binders), while in each group the cement substitution ratio was varied from 0% to 50%. Carbonation depth was measured after 14, 21 and 28 days of exposure to 2% CO2 in carbonation chamber, while the twin samples were exposed to nat...ural carbonation. It was shown that accelerated carbonation depths were similar in both groups for mixtures up to 30% of FA, but they were doubled and tripled for larger replacement levels. Using the previously modified fib carbonation model for service life design, the prediction of natural carbonation was made. A reliability of proposed modification was assessed by comparison between pre-dicted and measured values of natural carbonation after 19 and 34 months of exposure.
Кључне речи:
Fly ash concrete / Carbonation / Accelerated test / Prediction modelИзвор:
International RILEM Conference on Synergising Expertise towards Sustainability and Robustness of Cement-based Materials and Concrete Structures, 2023, 44, 1141-1152Издавач:
- Springer, Cham
Финансирање / пројекти:
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200092 (Универзитет у Београду, Грађевински факултет) (RS-MESTD-inst-2020-200092)
Институција/група
GraFarTY - CONF AU - Carević, Vedran AU - Radević, Aleksandar AU - Ignjatović, Ivan PY - 2023 UR - https://grafar.grf.bg.ac.rs/handle/123456789/3117 AB - The use of fly ash (FA) for the production of new concrete seems to be a promising solution for “greening” of construction industry. However, re-placement of cement with supplementary cementitious materials such as fly ash influences concrete performance especially in terms of durability. One of major durability problems worldwide is carbonation-induced corrosion, given that a large number of infrastructural objects are exposed to a CO2-rich environment. The objective of this research was to analyse the influence of cement substitution level on accelerated and natural carbonation of concrete. Experimental program considered testing of 10 concrete mixtures selected in two groups – with water to binder ratio of 0,5 (400 kg/m3 of binders) and 0,6 (300 kg/m3 of binders), while in each group the cement substitution ratio was varied from 0% to 50%. Carbonation depth was measured after 14, 21 and 28 days of exposure to 2% CO2 in carbonation chamber, while the twin samples were exposed to natural carbonation. It was shown that accelerated carbonation depths were similar in both groups for mixtures up to 30% of FA, but they were doubled and tripled for larger replacement levels. Using the previously modified fib carbonation model for service life design, the prediction of natural carbonation was made. A reliability of proposed modification was assessed by comparison between pre-dicted and measured values of natural carbonation after 19 and 34 months of exposure. PB - Springer, Cham C3 - International RILEM Conference on Synergising Expertise towards Sustainability and Robustness of Cement-based Materials and Concrete Structures T1 - Influence of Fly Ash as Cement Substitution on Accelerated and Natural Carbonation of Concrete EP - 1152 SP - 1141 VL - 44 DO - 10.1007/978-3-031-33187-9_106 ER -
@conference{ author = "Carević, Vedran and Radević, Aleksandar and Ignjatović, Ivan", year = "2023", abstract = "The use of fly ash (FA) for the production of new concrete seems to be a promising solution for “greening” of construction industry. However, re-placement of cement with supplementary cementitious materials such as fly ash influences concrete performance especially in terms of durability. One of major durability problems worldwide is carbonation-induced corrosion, given that a large number of infrastructural objects are exposed to a CO2-rich environment. The objective of this research was to analyse the influence of cement substitution level on accelerated and natural carbonation of concrete. Experimental program considered testing of 10 concrete mixtures selected in two groups – with water to binder ratio of 0,5 (400 kg/m3 of binders) and 0,6 (300 kg/m3 of binders), while in each group the cement substitution ratio was varied from 0% to 50%. Carbonation depth was measured after 14, 21 and 28 days of exposure to 2% CO2 in carbonation chamber, while the twin samples were exposed to natural carbonation. It was shown that accelerated carbonation depths were similar in both groups for mixtures up to 30% of FA, but they were doubled and tripled for larger replacement levels. Using the previously modified fib carbonation model for service life design, the prediction of natural carbonation was made. A reliability of proposed modification was assessed by comparison between pre-dicted and measured values of natural carbonation after 19 and 34 months of exposure.", publisher = "Springer, Cham", journal = "International RILEM Conference on Synergising Expertise towards Sustainability and Robustness of Cement-based Materials and Concrete Structures", title = "Influence of Fly Ash as Cement Substitution on Accelerated and Natural Carbonation of Concrete", pages = "1152-1141", volume = "44", doi = "10.1007/978-3-031-33187-9_106" }
Carević, V., Radević, A.,& Ignjatović, I.. (2023). Influence of Fly Ash as Cement Substitution on Accelerated and Natural Carbonation of Concrete. in International RILEM Conference on Synergising Expertise towards Sustainability and Robustness of Cement-based Materials and Concrete Structures Springer, Cham., 44, 1141-1152. https://doi.org/10.1007/978-3-031-33187-9_106
Carević V, Radević A, Ignjatović I. Influence of Fly Ash as Cement Substitution on Accelerated and Natural Carbonation of Concrete. in International RILEM Conference on Synergising Expertise towards Sustainability and Robustness of Cement-based Materials and Concrete Structures. 2023;44:1141-1152. doi:10.1007/978-3-031-33187-9_106 .
Carević, Vedran, Radević, Aleksandar, Ignjatović, Ivan, "Influence of Fly Ash as Cement Substitution on Accelerated and Natural Carbonation of Concrete" in International RILEM Conference on Synergising Expertise towards Sustainability and Robustness of Cement-based Materials and Concrete Structures, 44 (2023):1141-1152, https://doi.org/10.1007/978-3-031-33187-9_106 . .