A proposal for the maximum use of recycled concrete sand in masonry mortar design

• Autores: Enrique Fernández Ledesma, José Ramón Jiménez, J. Ayuso, V. Corinaldesi, F.J. Iglesias Godino
• Localización: Materiales de construcción, ISSN 0465-2746, Vol. 66, Nº. 321, 2016
• Idioma: inglés
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• Dialnet Métricas: 8 Citas
• Resumen

  • Natural sand mining from rivers and seashores is causing serious environmental problems in many parts of the world, whereas the fine fraction from recycling concrete waste is underutilized as a construction material. The aim of this paper is to determine the maximum replacement level of natural sand by recycled sand in the manufacturing of masonry mortar (M-10). For this purpose, five replacement levels were tested: 0%, 25%, 50%, 75% and 100% by volume. The mixes were made using cement CEM II/BL 32.5 N in a volumetric proportion of cement-to-aggregate of 1:5. A commercial admixture was used at a constant content. The amount of water was variable to achieve a consistency of 175±10 mm. The short- and long-term mortar properties were evaluated. The data were analyzed using a one-way ANOVA. In conclusion, a maximum percentage of 50% recycled concrete sand can be used in an indoor environment.