Quality Assessment of Mixed and Ceramic Recycled Aggregates from Construction and Demolition Wastes in the Concrete Manufacture According to the Spanish Standard †

Materials

Desirພ Rodríguez-Robles¹  Julia Garc໚-González²  Andrés Juan-Valdés²  Julia Mª Morán-del Pozo² 

[1] Superior and Technical School of Agricultural Engineering, University of Leon, Avda. Portugal 41, 24071 Leon, Spain;

关键词: characterization;    composition;    construction and demolition waste (CDW);    ceramic aggregate;    mixed aggregate;    recycled concrete;   

DOI  :  10.3390/ma7085843

来源: mdpi

【 摘 要 】

Construction and demolition waste (CDW) constitutes an increasingly significant problem in society due to the volume generated, rendering sustainable management and disposal problematic. The aim of this study is to identify a possible reuse option in the concrete manufacturing for recycled aggregates with a significant ceramic content: mixed recycled aggregates (MixRA) and ceramic recycled aggregates (CerRA). In order to do so, several tests are conducted in accordance with the Spanish Code on Structural Concrete (EHE-08) to determine the composition in weight and physic-mechanical characteristics (particle size distributions, fine content, sand equivalent, density, water absorption, flakiness index, and resistance to fragmentation) of the samples for the partial inclusion of the recycled aggregates in concrete mixes. The results of these tests clearly support the hypothesis that this type of material may be suitable for such partial replacements if simple pretreatment is carried out. Furthermore, this measure of reuse is in line with European, national, and regional policies on sustainable development, and presents a solution to the environmental problem caused by the generation of CDW.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.