Use of Recycled Aggregates from Demolition Wastes in Concrete: Acoustic Properties

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Title: Use of Recycled Aggregates from Demolition Wastes in Concrete: Acoustic Properties
Authors: Rodríguez, Carlos | Sánchez, Isidro | Martínez, Salvador | Carbajo San Martín, Jesús | Ramis-Soriano, Jaime | García-Legaz, Ignacio
Research Group/s: Durabilidad de Materiales y Construcciones en Ingeniería y Arquitectura | Acústica Aplicada
Center, Department or Service: Universidad de Alicante. Departamento de Ingeniería Civil | Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal
Keywords: Recycled aggregates | Pore structure | Sound absorption
Knowledge Area: Ingeniería de la Construcción | Física Aplicada
Issue Date: 2019
Publisher: WIT Press
Citation: WIT Transactions on Engineering Sciences. 2019, 124: 37-47. doi:10.2495/MC190041
Abstract: The construction industry is one of the most demanding in terms of natural resources, and of the most polluting in terms of emissions to the atmosphere. Concrete is one of the most used materials in engineering and is a paradigm of the consumption of rocks for aggregates, used in polluting industries such as cement production. In trying to reduce the consumption of natural resources, efforts are being made to use waste as recycled aggregates. This fact has evident economic and environmental advantages, but it has a drawback. The concrete prepared with recycled aggregates has lower mechanical strength than ordinary concrete. This decrease of resistance is mainly due to a higher porosity exhibited by the materials from recycled aggregates. But the increase of porosity can be a great advantage in terms of sound absorption. In this work several types of recycled aggregates have been tested, paying special attention to their acoustic behaviour and pore structure. The results show that concrete made with recycled waste are effective in absorbing sound. It might become an alternative to traditional concrete, since recycling samples behave similarly or better in terms of sound absorption, using recycled materials, and increasing their life-cycle. The measurement of acoustic properties, as well as density, has already been undertaken in previous works. This work presents an image analysis methodology that is completely novel, and that helps to understand the acoustic behaviour of concrete elements.
ISSN: 1743-3533
DOI: 10.2495/MC190041
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2019 WIT Press
Peer Review: si
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Appears in Collections:INV - DMCIA - Artículos de Revistas
INV - Acústica Aplicada - Artículos de Revistas

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