Investigation for Flood Flow quantification of Porous Asphalt with Different Surface and Subsurface Thickness

Abstract

Permeable pavement can be considered one of the most successful alternatives solution to traditional asphalt, which industrially widely used due to their ability to allow rainwater or water from another source to leak through the earth surface to a tank below the surface; and that can be used for water-saving due lack of rains or to increase groundwater, as well as for irrigation. Another advantage that these permeable pavements may offer is their ability to remove contaminants that affect vehicle traffic, by moving across the pavement to the drainage system. The study aims to select the associations between the rainfall's intensity, the quantity of surface and subsurface runoff depending on the open-graded material and computational models to evaluate the porous pavements design. In this study, three aggregate distributions which are minimum, medium and maximum specifications are used. The results show that the medium gradation has met the requirements, and it is considered the best gradient, crumbed rubber are used. The optimal binder content satisfy the requirements is 6.3% for the porous asphalt mixtures. Nevertheless, when crumbed rubber is used with (10, 15 and 20)%. Crumb rubber percent used is 15% by the weight of Asphalt cement utilised for porous mix. The experimental results are utilised to produce mathematic models that estimated the surface and subsurface runoff for asphalt pavement. By the benefit of non-linear regression modelling using (SPSS) statistics software and making several equations to express those events to extend the software application, to sum up, cases that were not experimentally studied.