A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Influence of unburnt carbon in the performance of concrete mixtures
Four fly ashes from coal-fired electric generating plants with LOI content of about 4,7,9, and 11 %, were used to manufacture concrete mixtures. A small amount of superplasticizer was required to compensate the slump decrease caused by fly ash with high LOI content. The performance of the concrete mixtures was assessed and compared with two reference mixtures without fly ash in terms of compressive strength at early and late ages, water-permeability, chloride diffusion and carbonation rate. It was found that fly ashes with a smaller LOI content did not necessarily perform better than those with a higher amount of LOI material. These results disagree with the conformity criteria of the European standard EN 450 (1). No relationship between the fly ash LOI content and the concrete performance was found.
Influence of unburnt carbon in the performance of concrete mixtures
Four fly ashes from coal-fired electric generating plants with LOI content of about 4,7,9, and 11 %, were used to manufacture concrete mixtures. A small amount of superplasticizer was required to compensate the slump decrease caused by fly ash with high LOI content. The performance of the concrete mixtures was assessed and compared with two reference mixtures without fly ash in terms of compressive strength at early and late ages, water-permeability, chloride diffusion and carbonation rate. It was found that fly ashes with a smaller LOI content did not necessarily perform better than those with a higher amount of LOI material. These results disagree with the conformity criteria of the European standard EN 450 (1). No relationship between the fly ash LOI content and the concrete performance was found.
Influence of unburnt carbon in the performance of concrete mixtures
Coppola, L. (author) / Troli, R. (author) / Zaffaroni, P. (author) / Belz, G. (author) / Collepardi, M. (author)
1998
17 Seiten, 6 Bilder, 3 Tabellen, 8 Quellen
Conference paper
English
Influence of Unburnt Carbon in the Performance of Concrete Mixtures
| British Library Conference Proceedings | 1998
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