Properties of cold asphalt mixtures containing recycled aggregates from construction and demolition waste
- Carretera Magazine No. 214 - July / August 2017
Breixo GÓMEZ-MEIJIDE
Nottingham Transportation Engineering Center (NTEC)
University of Nottingham. University Park
(NG7 SRD Nottingham - United Kingdom)
Ignacio PÉREZ
ETS de Ingeniería de Caminos, Canales y Puertos
Universidade da Coruña. (15071 A Coruña - España)
ABSTRACT
In this investigation, the use of Construction and Demolition Waste (CDW) as aggregates in cold asphalt mixtures was studied. Cold asphalt mixtures, grave-emulsion type, with 100% of recycled aggregates and control mixes, with 100% of natural aggregates, were tested in order to obtain their volumetric properties, as well as the parameters of their visco-elasto-plastic behavior (indirect tensile strength, indirect tensile stiffness modulus, dynamic modulus and resistance to permanent deformation) and non-linear elastic behavior (by means of triaxial tests, such as resilient modulus and resistance to permanent deformation). The results show that CDW are not only suitable for general use in medium/low traffic roads, but also they improve some properties of cold asphalt mixes, compared with those made just with natural aggregates.
KEYWORDS
Cold asphalt mixtures, Construction and demolition waste, Recycling, Mechanical properties, Medium and low traffic roads.
