Recycled blocks with improved sound and fire insulation containing construction and demolition waste.

Carlos Leiva, Jaime Solís-Guzmán, Madelyn Marrero, Celia García Arenas

Department of Chemical and Environmental Engineering, E.S. Ingenieros Industriales, University of Seville, 41092 Seville, Spain.

Waste management (New York, N.Y.) 2013 Mar

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The environmental problem posed by construction and demolition waste (C&D waste) is derived not only from the high volume produced, but also from its treatment and disposal. Treatment plants receive C&D waste which is then transformed into a recycled mixed aggregate. The byproduct is mainly used for low-value-added applications such as land escape restoration, despite the high quality of the aggregate. In the present work, the chemical composition properties and grading curve properties of these aggregates are defined. Furthermore, the resulting recycled concrete with a high proportion of recycled composition, from 20% to 100% replacement of fine and coarse aggregate, is characterized physically and mechanically. An environmental study of the new construction material when all aggregates are substituted by C&D waste shows a low toxicity level, similar to that of other construction materials. The new material also has improved properties with respect to standard concrete such as high fire resistance, good heat insulation, and acoustic insulation. Copyright © 2012 Elsevier Ltd. All rights reserved.

Citation

Carlos Leiva, Jaime Solís-Guzmán, Madelyn Marrero, Celia García Arenas. Recycled blocks with improved sound and fire insulation containing construction and demolition waste. Waste management (New York, N.Y.). 2013 Mar;33(3):663-71