Arquitectura

URI permanente para esta comunidadhttps://hdl.handle.net/11441/33251

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Examinando Arquitectura por Materia "Absorción"

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    Empirical definition of effective water / cement ratio in mortars with recycled aggregate depending on the absorption
    (2015) Velay-Lizancos, Mª Mirian; Martinez-Lage, Isabel; Vazquez-Herrero, Cristina; Vazquez-Burgo, Pablo
    The use of recycled aggregates from construction and demolition wastes for the manufacture of mortars and concretes is a subject of great interest from the point of view of sustainable construction since it can reduce the exploitation of quarries replacing natural aggregate by recycled aggregate and it can reduce the volume of wastes in landfills. In order to study the influence of recycled aggregate on concrete and mortar strength, the effective water/cement ratio must be the same in concretes or mortars compared. The effective water/cement ratio is defined as the amount of water available to react with the cement of the mixture. Discrepancies among authors arise in the definition of how much is the amount of available water, which depends on the absorption and moisture of the aggregates at the time of the batch. Therefore, in this research, an experimental study is developed empirically to find the amount of water which reacts with the cement mortar in various mixtures with different ratios of recycled aggregate depending on the absorption of the aggregates. Subsequently, the relations between the amount of water which doesn’t react with the cement and aggregate absorption of each of the mixtures were analyzed. Finally, a definition of the effective water/cement ratio depending on absorption is proposed, based on the empirical study developed.