RT Journal Article
T1 Recycled Aggregates from Construction and DemolitionWaste in the Manufacture of Urban Pavements
A1 Contreras Llanes, Manuel
A1 Romero, Maximina
A1 Gázquez González, Manuel Jesús
A1 Bolívar Raya, Juan Pedro
AB Construction and Demolition Waste (CDW) is among the largest waste streams  n the world. Therefore, within the Circular Economy concept, there is a growing interest in its reuse. The purpose of this work was to study the use of recycled aggregates (RAs) obtained by a specific separation method from CDW, replacing natural aggregates (NAs) in the manufacture of precast concrete elements, such as kerbstones and paver blocks. The physical and  technological properties of precast products formulated with RAs were analysed in accordance with current regulations, comparing them with those of commercial products manufactured with NAs. The results indicated that partial or total substitution of NAs by RAs increased the water absorption and apparent porosity values of the precast elements while reducing the bulk density and compressive strength. However, all units manufactured with RAs showed breaking load values higher than the minimum required by EN 1338 and, in some cases, slightly higher average tensile strength values than the reference material. In addition, some of the compositions including RAs gave rise to pieces that, according to their flexural strength, were classified as class 1 and marked S in accordance with EN 1340. According to abrasion resistance, in most cases, the precast elements are classified as Class 4 and I ( 20 mm). Finally, precast concrete produced from RAs satisfies the tolerance requirements for classification as class 3 ( 1.5 kg m??2). Therefore, it could be suitable for use in high pedestrian or traffic areas. 
PB MDPI
SN 1996-1944
YR 2021
FD 2021
LK http://hdl.handle.net/10272/20873
UL http://hdl.handle.net/10272/20873
LA eng
NO Contreras-Llanes, M.; Romero, M.; Gázquez, M.J.; Bolívar, J.P. Recycled Aggregates from Construction and Demolition Waste in the Manufacture of Urban Pavements. Materials 2021, 14, 6605. https://doi.org/10.3390/ma14216605
NO This research was partially supported by the Centre for the Development of IndustrialTechnology (CDTI) to the Spanish Ministry of Economy, Industry and Competitiveness (MINECO),by the project “Eco-efficient concrete urban paving from mixed recycled aggregates obtained fromCDW” (Ref.: IDI-20180931). This research has been partially supported by RENSMA (ResearchCentre for Natural Resources, Health and Environment), University of Huelva, Spain.
DS Repositorio Institucional de la Universidad de Huelva
RD 1 jun 2026