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Review

Using Recycled Aggregates from Construction and Demolition Waste in Unbound Layers of Pavements

1
Department of Civil, Chemical, Environmental and Materials Engineering (DICAM), University of Bologna, Via Terracini 28, 40131 Bologna, Italy
2
Department of Agricultural and Food Sciences (DISTAL), University of Bologna, Viale Fanin 48, 40127 Bologna, Italy
*
Author to whom correspondence should be addressed.
Sustainability 2020, 12(22), 9386; https://0-doi-org.brum.beds.ac.uk/10.3390/su12229386
Received: 29 September 2020 / Revised: 3 November 2020 / Accepted: 5 November 2020 / Published: 11 November 2020
(This article belongs to the Special Issue Sustainable Urban Surfaces)
Pavements are an expensive part of transportation infrastructures, as their construction and maintenance require large amounts of resources and materials every year and all over the world. A sustainable solution for considering environmental concerns about roads and pavements, in general, is utilizing recycled materials for their construction. This has been shown to lower the carbon footprint of the construction sector and to result in natural resource conservation, in reduction of harmful emissions and in minimization of overall costs for pavement construction and maintenance. One of the main groups of recycled materials which has attracted much attention since the end of the last century is construction and demolition waste aggregates (CDW). This paper reviews the completed studies referring to the use of the construction and demolition waste aggregates in unbound layers of pavements and compare the in-hand results from various engineering assessments of these aggregates and mixes. A number of tests and evaluations are applied in order to enhance the required quality and durability of the pavements under given traffic volumes traffic loads and climate actions. Today, unbound recycled aggregates (RA) are mainly used in the lower layers, such as subgrade, capping, sub-base and base, but in rural roads they can be adopted also for bound layers, towards the surface of the structure and may be constituents of bound layers and of novel surfacing applications. View Full-Text
Keywords: recycled materials; construction and demolition; pavements; sustainability; waste recycled materials; construction and demolition; pavements; sustainability; waste
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MDPI and ACS Style

Pourkhorshidi, S.; Sangiorgi, C.; Torreggiani, D.; Tassinari, P. Using Recycled Aggregates from Construction and Demolition Waste in Unbound Layers of Pavements. Sustainability 2020, 12, 9386. https://0-doi-org.brum.beds.ac.uk/10.3390/su12229386

AMA Style

Pourkhorshidi S, Sangiorgi C, Torreggiani D, Tassinari P. Using Recycled Aggregates from Construction and Demolition Waste in Unbound Layers of Pavements. Sustainability. 2020; 12(22):9386. https://0-doi-org.brum.beds.ac.uk/10.3390/su12229386

Chicago/Turabian Style

Pourkhorshidi, Sajjad, Cesare Sangiorgi, Daniele Torreggiani, and Patrizia Tassinari. 2020. "Using Recycled Aggregates from Construction and Demolition Waste in Unbound Layers of Pavements" Sustainability 12, no. 22: 9386. https://0-doi-org.brum.beds.ac.uk/10.3390/su12229386

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