Effect of curing age on the durability of high-volume fly ash concrete
- Author
- Nele De Belie (UGent) , Stijn Lammertijn and Kathelijne Cox
- Organization
- Abstract
- High volume fly ash (HVFA) concrete is one of the "green" alternatives developed to reduce the energy consumption and CO2 emission related to the cement production. The pozzolanic reaction of fly ash is a retarded process compared to the cement hydration. As a result, the strength, microstructure development and consequently also the durability behavior of fly ash mixtures will be strongly influenced by age. After all, durability is, to a large extent, determined by the possibility for aggressive substances to penetrate into the concrete, and the latter is in turn determined by the porosity and transport properties of the concrete. This paper describes the results of tests on 4 fly ash mixtures, each with different fly ash replacement level namely 0, 35, 50 and 67 %, but with the same water-to-cementitious materials ratio. The experiments were executed at the age of 1, 3 and 6 months. Permeable porosity and gas permeability increased with increasing fly ash content. A reduction in porosity was noticed between 1 and 3 months for the fly ash mixtures due to the pozzolanic reaction. The carbonation depth was considerably higher for the 50 and 67 % fly ash mixtures at all ages compared to the ordinary Portland cement concrete. Carbonation appeared to have a negative effect on gas permeability, especially for the 50 and 67 % mixtures.
- Keywords
- carbonation, permeability, porosity, fly ash, durability
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Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-691073
- MLA
- De Belie, Nele, et al. “Effect of Curing Age on the Durability of High-Volume Fly Ash Concrete.” Durability of Building Materials and Components 11 : Globality and Locality in Durability : Proceedings of the Eleventh International Conference, Vol 1 : Durability of Materials I, edited by A Nil Türkeri and Özkan Sengül, DBMC, 2008, pp. 169–77.
- APA
- De Belie, N., Lammertijn, S., & Cox, K. (2008). Effect of curing age on the durability of high-volume fly ash concrete. In A. N. Türkeri & Ö. Sengül (Eds.), Durability of building materials and components 11 : globality and locality in durability : proceedings of the eleventh international conference, vol 1 : durability of materials I (pp. 169–177). Istanbul, Turkey: DBMC.
- Chicago author-date
- De Belie, Nele, Stijn Lammertijn, and Kathelijne Cox. 2008. “Effect of Curing Age on the Durability of High-Volume Fly Ash Concrete.” In Durability of Building Materials and Components 11 : Globality and Locality in Durability : Proceedings of the Eleventh International Conference, Vol 1 : Durability of Materials I, edited by A Nil Türkeri and Özkan Sengül, 169–77. Istanbul, Turkey: DBMC.
- Chicago author-date (all authors)
- De Belie, Nele, Stijn Lammertijn, and Kathelijne Cox. 2008. “Effect of Curing Age on the Durability of High-Volume Fly Ash Concrete.” In Durability of Building Materials and Components 11 : Globality and Locality in Durability : Proceedings of the Eleventh International Conference, Vol 1 : Durability of Materials I, ed by. A Nil Türkeri and Özkan Sengül, 169–177. Istanbul, Turkey: DBMC.
- Vancouver
- 1.De Belie N, Lammertijn S, Cox K. Effect of curing age on the durability of high-volume fly ash concrete. In: Türkeri AN, Sengül Ö, editors. Durability of building materials and components 11 : globality and locality in durability : proceedings of the eleventh international conference, vol 1 : durability of materials I. Istanbul, Turkey: DBMC; 2008. p. 169–77.
- IEEE
- [1]N. De Belie, S. Lammertijn, and K. Cox, “Effect of curing age on the durability of high-volume fly ash concrete,” in Durability of building materials and components 11 : globality and locality in durability : proceedings of the eleventh international conference, vol 1 : durability of materials I, Istanbul, Turkey, 2008, pp. 169–177.
@inproceedings{691073,
abstract = {{High volume fly ash (HVFA) concrete is one of the "green" alternatives developed to reduce the energy consumption and CO2 emission related to the cement production. The pozzolanic reaction of fly ash is a retarded process compared to the cement hydration. As a result, the strength, microstructure development and consequently also the durability behavior of fly ash mixtures will be strongly influenced by age. After all, durability is, to a large extent, determined by the possibility for aggressive substances to penetrate into the concrete, and the latter is in turn determined by the porosity and transport properties of the concrete.
This paper describes the results of tests on 4 fly ash mixtures, each with different fly ash replacement level namely 0, 35, 50 and 67 %, but with the same water-to-cementitious materials ratio. The experiments were executed at the age of 1, 3 and 6 months. Permeable porosity and gas permeability increased with increasing fly ash content. A reduction in porosity was noticed between 1 and 3 months for the fly ash mixtures due to the pozzolanic reaction. The carbonation depth was considerably higher for the 50 and 67 % fly ash mixtures at all ages compared to the ordinary Portland cement concrete. Carbonation appeared to have a negative effect on gas permeability, especially for the 50 and 67 % mixtures.}},
author = {{De Belie, Nele and Lammertijn, Stijn and Cox, Kathelijne}},
booktitle = {{Durability of building materials and components 11 : globality and locality in durability : proceedings of the eleventh international conference, vol 1 : durability of materials I}},
editor = {{Türkeri, A Nil and Sengül, Özkan}},
isbn = {{978-975-561-325-3 (SET)}},
keywords = {{carbonation,permeability,porosity,fly ash,durability}},
language = {{eng}},
location = {{Istanbul, Turkey}},
pages = {{169--177}},
publisher = {{DBMC}},
title = {{Effect of curing age on the durability of high-volume fly ash concrete}},
year = {{2008}},
}