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Descripción
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| Self-Compacting Concretes (SCC) are sustainable materials because they replace large amounts of cement by the use of low embodied energy and CO2 mineral additions. The addition of such fine materials not only enhances the workability of the mix, but also enlarges the durability due to the reduction of intrinsic permeability. However, the addition of fine materials may alter the behaviour of the mix during pumping, making it shear-thickening and requiring unexpectedly high pumping pressures in some cases. These effects make necessary the development of some kind of quality control methodology for assessing the performance of these mixes during pumping. This paper presents preliminary results obtained in an ongoing experimental program on the behaviour of SCC mixes during pumping and early ages (EA); with the overall goal of identifying a set of parameters useable for quality control while pumping those mixes. Results obtained so far, suggest that the function linking pressure gradient with discharge rate is not linear for some SCC mixes, making not directly applicable QC methods based on the assumption of a linear behaviour. Results also show that the selected EA indicators allow a proper assessment of the changes which affect later SCC hardened performance. | |
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Internacional
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Si |
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Nombre congreso
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II International Conference on Concrete Sustainability (ICCS16) |
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Tipo de participación
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960 |
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Lugar del congreso
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Madrid, España |
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Revisores
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Si |
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ISBN o ISSN
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978-84-945077-7-9 |
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DOI
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Fecha inicio congreso
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13/06/2016 |
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Fecha fin congreso
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15/06/2016 |
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Desde la página
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797 |
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Hasta la página
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808 |
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Título de las actas
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ICCS16 Concrete Sustainability. Proceedings of the Second International Conference on Concrete Sustainability, held in Madrid, Spain on 13 - 15 June 2016 |