TY - GEN
T1 - Assessment of moisture transport in hot mix asphalt using X-ray computed tomography
AU - Arambula, E.
AU - Masad, E.
AU - Epps Martin, A.
AU - Ketcham, Richard A.
AU - Abbas, Ala R.
PY - 2007
Y1 - 2007
N2 - The majority of the research on moisture damage is based on the hypothesis that infiltration of surface water is the main source of moisture. Of the two other principal mechanisms of water transport, permeation of water vapor and capillary rise of subsurface water, the latter has been least explored. In this study a laboratory test and analysis methods based on X-ray computed tomography (CT) were established to assess the water transport through capillary action. Also, a computer program was developed to analyze the distribution of connected air voids. The amount and size of air voids filled with water were used in the capillary rise equation to estimate the statistical distribution of the contact angles between the water and the asphalt mastic. The results were able to show the influence of air void size on capillary rise and contact angles, and showed clear differences between the moisture conditioned and unconditioned specimens.
AB - The majority of the research on moisture damage is based on the hypothesis that infiltration of surface water is the main source of moisture. Of the two other principal mechanisms of water transport, permeation of water vapor and capillary rise of subsurface water, the latter has been least explored. In this study a laboratory test and analysis methods based on X-ray computed tomography (CT) were established to assess the water transport through capillary action. Also, a computer program was developed to analyze the distribution of connected air voids. The amount and size of air voids filled with water were used in the capillary rise equation to estimate the statistical distribution of the contact angles between the water and the asphalt mastic. The results were able to show the influence of air void size on capillary rise and contact angles, and showed clear differences between the moisture conditioned and unconditioned specimens.
UR - http://www.scopus.com/inward/record.url?scp=84858047937&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84858047937
SN - 9780415448802
T3 - Advanced Characterisation of Pavement and Soil Engineering Materials - Proceedings of the International Conference on Advanced Characterisation of Pavement and Soil Engineering Materials
SP - 729
EP - 738
BT - Advanced Characterisation of Pavement and Soil Engineering Materials - Proceedings of the International Conference on Advanced Characterisation of Pavement and Soil Engineering Materials
T2 - International Conference on Advanced Characterisation of Pavement and Soil Engineering Materials
Y2 - 20 June 2007 through 22 June 2007
ER -