Soft bitumen asphalt produced using RAP

• Soft bitumen asphalt concrete is a common paving material in Scandinavia. The purpose of this investigation was to indicate the possibility to compensate for the stiff binder of reclaimed asphalt pavement (RAP) by using softer binders compared to the mix design. Characterization of binder mixing and diffusion were carried out using viscosity measurements and tests on asphalt concrete comprised stiffness modulus and cyclic compression testing. Acquired results suggest that virgin and reclaimed binders mix and the viscosity can be predicted using simple mixing models. In the case of asphalt made from mixing virgin and recycled material, the mechanical properties indicates fully mixed binders and mixing occurs during sample manufacturing. In general, this study suggests that soft asphalt mixtures can be produced using RAP and that nominal binder viscosity of the final product can be obtained by compensating the stiff binder of the RAP by virgin bitumen of a softer grade.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Samhällsbyggnadsteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Civil Engineering (hsv//eng)

Nyckelord

Diffusion

Equiviscous

Mixing model

Reclaimed asphalt

Soft bitumen

Asphalt

Asphalt mixtures

Binders

Bins

Bituminous materials

Characterization

Color image processing

Compression testing

Concrete mixing

Concrete testing

Concretes

Mixing

Reclamation

Viscosity

Viscosity measurement

Binder viscosity

Mix designs

Mixing models

Reclaimed asphalt pavements

Recycled materials

Stiffness moduli

Asphalt concrete

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)