Asphalt oxidation is a chemical reaction between asphalt binders and oxygen that causes irreversible changes in the properties of asphalt materials used in pavement structures. This paper explores the influence of the air void phase of asphalt mixtures on Hollister Co Canada Coupons
oxidation. Microstructures of an asphalt mixture with probable internal air void structures were generated and implemented in finite elements, and they were used in Hollister Canada Outlet
combination with oxygen diffusion and chemical kinetics models to estimate the changes generated in the mechanical
properties of the material. The results confirm that the air void phase strongly impacts the stiffening processes caused by oxidation in asphalt mixtures.
We present a new method that allows to enumerate many classes of column-convex polygons, according to their perimeter, width and area. The first step of this method leads to a functional equation which defines implicitly the generating function for the class of polygons under consideration. The second step consists in solving this equation. We apply systematically our method to all the usual classes of column-convex polygons: thus, we first refine some already known results for parallelogram polygons, directed and convex polygons, and convex polygons, and then we obtain two new results, namely the generating function for column-convex polygons and directed column-convex polygons.