Title:
Potential Recycling of Bottom and Fly Ashes in Acoustic Mortars and Concretes
Author(s):
Carlos Leiva, Luis F. Vilches, Celia Arenas, Silvia Delgado, and Constantino Fernandez-Pereira
Publication:
Materials Journal
Volume:
109
Issue:
5
Appears on pages(s):
529-536
Keywords:
bottom ash; fly ash; leaching; reflection coefficient; sound absorption.
DOI:
10.14359/51684084
Date:
9/1/2012
Abstract:
This study performed an evaluation of the physical, mechanical, and sound absorption characteristics of mortars and concrete containing co-combustion bottom (BA) and fly ashes (FA). The objectives were to produce building elements capable of reducing noise and to use co-combustion residues. The obtained results demonstrated that the use of BA in a concrete formulation (up to 60 wt%) produced an increase of sound absorption capacity—similar to the sound absorption capacity observed in porous concrete (PC) commonly used in acoustic barriers—but the mechanical strength decreased. The FA mortars presented a high reflection coefficient (RFC) and also showed reduced mechanical strength, similar to the BA concrete. According to different leaching test results, no problems were found in this product.