2015 Volume 70 Issue 3 Pages I_205-I_212
The permeation type repairing method is one of the most effective repairing methods to the porous asphalt mixtures. When the permeation type repair material is penetrated from the surface of the porous asphalt mixture, the effect of the water interception layer and the effect of the adhesion enhancing of coarse aggregate are exerted internally. However, it has been very difficult to evaluate the filling situation of repair materials in the porous asphalt mixture nondestructively. Inthisstudy, weproposeanewevaluationmethodofafillingsituationofthepermeationtyperepairmaterialtotheporous asphalt mixture by the X-ray computed tomography (CT). The proposed method is applied to the experiments of filling situation of the permeation type repairing of the porous asphalt mixtures. In the proposed method, the CT value distribution of each material and the porous asphalt mixture are estimated by the least-square method. As the result, we can supposed the CT value distribution of each material to be the Gaussian distribution. The results also show the proposed method can estimate the materials composition ratio in the test specimen with 5% of differences and can estimate the filling rate and adhesion quantity to coarse aggregate at each depth.
