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Paving with Precast Concrete Made with Recycled Mixed Ceramic Aggregates: A Viable Technical Option for the Valorization of Construction and Demolition Wastes (CDW)
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Materials
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1
Cita Bibliográfica
Juan Valdés, A.; García González, J.; Rodríguez Robles, D.; Guerra Romero, M. I.; López Gayarre, F.; De Belie, N.; Morán Del Pozo, J. M. (2018). Paving with Precast Concrete Made with Recycled Mixed Ceramic Aggregates: A Viable Technical Option for the Valorization of Construction and Demolition Wastes (CDW). Materials, 12(1), https://doi.org/10.3390/MA12010024
Editorial
MDPI
Fecha
2018
Resumen
materialsArticle
Paving with Precast Concrete Made with Recycled
Mixed Ceramic Aggregates: A Viable Technical
Option for the Valorization of Construction and
Demolition Wastes (CDW)
Andrés Juan-Valdés 1,* , Julia García-González 2, Desirée Rodríguez-Robles 3,
Manuel Ignacio Guerra-Romero 1, Fernando López Gayarre 4, Nele De Belie 5
and Julia M. Morán-del Pozo 1
1 Department of Agricultural Engineering and Sciencies, University of León, 24071 León, Spain;
ignacio.guerra@unileon.es (M.I.G.-R.); julia.moran@unileon.es (J.M.M.-d.P.)
2 Department of Agriculture and Feeding, University of La Rioja, 26006 Logroño, Spain;
julia.garciag@unirioja.es
3 Department of Agronomy and Forestry Engineering, University of Extremadura, 06007 Badajoz, Spain;
desireerodriguez@unex.es
4 Department of Construction, Campus de Gijón, University of Oviedo, 33203 Gijón, Spain; gayarre@uniovi.es
5 Magnel Laboratory for Concrete Research, Ghent University, 9052 Ghent, Belgium; Nele.DeBelie@ugent.be
* Correspondence: andres.juan@unileon.es; Tel.: +34-987-291000
Received: 4 December 2018; Accepted: 18 December 2018; Published: 21 December 2018
Abstract: This research aimed to prove the feasibility of producing two types of precast elements
widely used in construction, such as curbstones and paving blocks, using recycled concrete made
with a 50% substitution of the natural gravel by recycled mixed aggregates with a significant ceramic
content (>30%). In order to prove the quality of such mass concrete recycled precast elements, two
different mixes were used: the first one was a conventional concrete mix provided by Prefabricados
de Hormigón Pavimentos Páramo S.L., one of the collaborating companies in this study, and the
other was a mixture in which wt 50% of the natural coarse aggregates were substituted for recycled
mixed aggregates ceramic (RMAc). This recycled aggregate is a heterogeneous mixture of unbound
aggregates, concrete, ceramic, etc., used as a secondary recycled aggregate and commonly produced
in a lot of recycling plants in many European countries. This material was supplied by Tecnología
y Reciclado S.L., the other collaborating company. Both mixtures were representative in order to
establish the comparative behavior between them, taking into account that smaller percentages of
replacement of the natural with recycled aggregates will also produce good results. This percentage of
substitution represents a high saving of natural resources (gravel) and maintains a balanced behavior
of the recycled concrete, so this new material can be considered to be a viable and reliable option
for precast mass concrete paving elements. The characterization of the recycled precast elements,
covering mechanical, microstructural, and durability properties, showed mostly similar behavior
when compared to the analogous industrially-produced pieces made with conventional concrete.
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