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Descripción
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| An experimental study on the effect of real scale hot-dry climate conditions and full scale cast-in-place by pumping of Self-Compacting Concrete (SCC) with fly ash (FA) was carried out. The influence of water to binder ratio (w/b), mixing scale, curing conditions and cast-in-place by pumping on the early age and hardened properties and on the hardened microstructure were analyzed in SCC samples manufactured in the laboratory, in a full scale concrete plant and in an on-site application of pumped SCC. The aim of the study was to compare the early age and hardened properties of SCC mixtures manufactured in laboratory conditions and in real scale applications. It was found that the samples manufactured outside the laboratory showed changes on their properties that can be related to changes in their microstructure. The increase of w/b produced larger air gaps at the interfacial transition zone (ITZ), increased total porosity and mezzo-porosity and reduced apparent density, compressive strength and ultrasonic pulse parameters. The use of an industrial mixer in hot-dry real scale climate conditions increased w/b required to achieve self-compactability, amplified fly ash reactivity and enlarged air gaps in the ITZ. Cast in-place by pumping in hot-dry climate conditions accelerated cement hydration at early age and increased mezzo-porosity and air permeability, while reduced compressive strength. | |
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Internacional
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JCR del ISI
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Si |
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Título de la revista
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Construction and Building Materials |
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ISSN
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0950-0618 |
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Factor de impacto JCR
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3,485 |
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Información de impacto
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Volumen
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191 |
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DOI
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10.1016/j.conbuildmat.2018.10.110 |
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Número de revista
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Desde la página
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1128 |
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Hasta la página
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1138 |
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Mes
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SIN MES |
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Ranking
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Q1 (JCR) |