Chloride diffusion tests as experimental basis for full probabilistic service life prediction and life-cycle assessment of concrete with fly ash in a submerged marine environment
Van den Heede, P.; Maes, M.; Caspeele, R.; De Belie, N. (2012). Chloride diffusion tests as experimental basis for full probabilistic service life prediction and life-cycle assessment of concrete with fly ash in a submerged marine environment, in: Strauss, A. et al. Life-Cycle and Sustainability of Civil Infrastructure SystemsProceedings of the Third International Symposium on Life-Cycle Civil Engineering (IALCCE'12), Vienna, Austria, October 3-6, 2012. pp. 913-920
In: Strauss, A. et al. (2012). Life-Cycle and Sustainability of Civil Infrastructure Systems
Proceedings of the Third International Symposium on Life-Cycle Civil Engineering (IALCCE'12), Vienna, Austria, October 3-6, 2012. CRC Press: Leiden. ISBN 978-0-415-62126-7. 2481 pp., more
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| Abstract |
Today, a correct quantification of the reduced greenhouse gas emissions associated with partial replacement of cement by fly ash (FA), is still lacking. Too often, this environmental benefit is simply equaled with the FA percentage in concrete, an estimation in violation with two basic rules in life cycle assessment: (i) Environmental impacts should be calculated for durability and strength related functional units (FU), (ii) justified impacts of coal fired electricity production should be allocated to its industrial by-product FA. Therefore, a centrically loaded column with a 100 years service life in a submerged marine environment, was adopted as FU with economic allocation of the FA impact. The number of column replacements within 100 years due to corrosion was estimated from probabilistic service life prediction based on chloride diffusion tests. Global warming potentials for concrete with 15-50% FA were at least 45-48 % less than for traditional concrete. |
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