History dependence of water diffusion in asphalt binders Academic Article

abstract

• Despite the importance of hysteresis of water diffusion in polymeric materials, only limited literature is available on this subject. The FT-IR-ATR spectroscopy technique was used to investigate the effect of cycling moisture boundary conditions on the diffusivity of moisture of three asphalt binders. Each sample passed through three hydration cycles and two dehydration cycles. The existence of hysteresis of moisture diffusivity in asphalt binders is validated. The increase in moisture diffusivity is primarily attributed to the change in microstructure of the asphalt binder after being exposed to moisture. This is supported by atomic force microscope images of asphalt binder before and after exposure to water. Evidence to an increase of water trapped in the form of vapour even after dehydration was observed, and this may also contribute to the increase in diffusivity. This topic is still under investigation by this research group. 2011 Taylor & Francis.

authors

• Little, Dallas

published proceedings

• INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING

author list (cited authors)

• Vasconcelos, K. L., Bhasin, A., & Little, D. N.

citation count

• 33

complete list of authors

• Vasconcelos, Kamilla L||Bhasin, Amit||Little, Dallas N

publication date

• October 2011

publisher

• Taylor & Francis  Publisher

published in

• The International Journal of Pavement Engineering  Journal

keywords

• Asphalt Binder
• History Dependence
• Water Diffusion

Digital Object Identifier (DOI)

• 10.1080/10298436.2010.535536

start page

• 497

end page

• 506

volume

• 12

issue

• 5

URL

• http://dx.doi.org/10.1080/10298436.2010.535536