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Stiffness of cold asphalt mixtures with recycled aggregates from construction and demolition waste

Gómez-Meijide, B. / Pérez, I. / Airey, G. / Thom, N.

Highlights • The stiffness of cold asphalt mixtures (CAM) containing CDW as aggregate were studied. • CAMs with CDWA frequently achieved higher stiffness than control mixes. • CAMs with CDWA were less temperature susceptible and more fatigue resistant. • CAMs with CDWA were more complicated to design. • Clear dependency of stiffness on the compaction process (static and gyratory).

Abstract The stiffness of cold asphalt mixtures (CAM) with 100% recycled construction and demolition waste aggregates (CDWA) was studied from three different points of view: the indirect tensile stiffness modulus (ITSM), the dynamic modulus at different temperatures and frequencies and the correlation between them. It was found that CAM with CDWA frequently achieved higher stiffness than control mixes using natural aggregate (NA), but that they required significantly higher bitumen and water contents. They were less temperature susceptible, therefore potentially more fatigue resistant, but more complicated to design. Finally, a clear dependency on the compaction process (static and gyratory) was also found.

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Stiffness of cold asphalt mixtures with recycled aggregates from construction and demolition waste

Gómez-Meijide, B. / Pérez, I. / Airey, G. / Thom, N.

Highlights • The stiffness of cold asphalt mixtures (CAM) containing CDW as aggregate were studied. • CAMs with CDWA frequently achieved higher stiffness than control mixes. • CAMs with CDWA were less temperature susceptible and more fatigue resistant. • CAMs with CDWA were more complicated to design. • Clear dependency of stiffness on the compaction process (static and gyratory).

Abstract The stiffness of cold asphalt mixtures (CAM) with 100% recycled construction and demolition waste aggregates (CDWA) was studied from three different points of view: the indirect tensile stiffness modulus (ITSM), the dynamic modulus at different temperatures and frequencies and the correlation between them. It was found that CAM with CDWA frequently achieved higher stiffness than control mixes using natural aggregate (NA), but that they required significantly higher bitumen and water contents. They were less temperature susceptible, therefore potentially more fatigue resistant, but more complicated to design. Finally, a clear dependency on the compaction process (static and gyratory) was also found.

Stiffness of cold asphalt mixtures with recycled aggregates from construction and demolition waste

Gómez-Meijide, B. / Pérez, I. / Airey, G. / Thom, N.

Highlights • The stiffness of cold asphalt mixtures (CAM) containing CDW as aggregate were studied. • CAMs with CDWA frequently achieved higher stiffness than control mixes. • CAMs with CDWA were less temperature susceptible and more fatigue resistant. • CAMs with CDWA were more complicated to design. • Clear dependency of stiffness on the compaction process (static and gyratory).

Abstract The stiffness of cold asphalt mixtures (CAM) with 100% recycled construction and demolition waste aggregates (CDWA) was studied from three different points of view: the indirect tensile stiffness modulus (ITSM), the dynamic modulus at different temperatures and frequencies and the correlation between them. It was found that CAM with CDWA frequently achieved higher stiffness than control mixes using natural aggregate (NA), but that they required significantly higher bitumen and water contents. They were less temperature susceptible, therefore potentially more fatigue resistant, but more complicated to design. Finally, a clear dependency on the compaction process (static and gyratory) was also found.

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Title:

Stiffness of cold asphalt mixtures with recycled aggregates from construction and demolition waste

Contributors:

Gómez-Meijide, B. (author) / Pérez, I. (author) / Airey, G. (author) / Thom, N. (author)

Published in:

Construction and Building Materials ; 77 ; 168-178

Publication date:

2014-12-24

Size:

11 pages

ISSN:

DOI:

https://doi.org/10.1016/j.conbuildmat.2014.12.045

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

CAM , cold asphalt mixtures , HMA , hot mix asphalt , CDWA , construction and demolition waste aggregates , ITSM , indirect tensile stiffness modulus , NA , natural aggregate , Construction and demolition waste , Cold asphalt mixture , Stiffness , Dynamic modulus , Master curves

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