Permeable pavement is widely used to improve the water circulation systems in urban areas. The advantages of using permeable pavement include the storage of rainwater, reduction of runoff, out-flow delay and reduction of peak discharge. Permeable friction course (PFC) is mixed as a thin surface layer of asphalt pavement in order to achieve environmental and safety benefits. This mixture creates a surface course of a permeable compacted mix of aggregates, consisting of sand, binder, and asphalt, that is blended hot in the mixing stage. The aim of this research is to determine the best characteristics of such permeable mixtures. In this study, three aggregate distributions of minimum, medium, and maximum specifications are utilised to select the best proportions of asphalt cement for a porous asphalt surface. The results show that the medium gradation meets the requirements and can thus be considered the best gradient. The optimal binder content is found to be 6.3% for permeable asphalt mixtures

Whatever vehicle is traveling, it needs to stop in order to arrive road users their different goals. In most universities, parking becomes an important campus resource, for being as a place to come frequently and to spend long period. Now days parking problems increase with repaid growth of car ownership. So traffic and parking impact can be consider as a major source of contention within any community and can raise additional costs for universities, as well as urban areas facilities. The study aims to evaluate the current parking situation on the university campus in terms of the available supply and required demand of parking spaces in order to recommend future parking spaces need for the next five years. Data has had been collected according to field traffic and engineering survey, Videography method was used for this purpose. Inventories, Interviews and questionnaires included. Data analysis conducted with the aided of AASHTO and equation methods. The study concluded future parking required is 140 vehicle- spaces for the year 2026, according to population rate of growth also illegal parking leads to interference with the movements of pedestrians and their crossing, as well as reducing the capacity of the roads in the study area. Doi: 10.28991/cej-2021-03091767 Full Text: PDF

The permeable pavement seems to be an established stormwater management solution that may be utilized in parking and low-traffic areas. These pavements can reduce the amount of runoff that reduces the environmental impact compared with a traditional drainage system. Traditional drainage systems, which carry stormwater runoff quickly to a stream by piped systems, cause increases in runoff volume, peak flow, and pollutants are taken to rivers. This paper tests permeable asphalt pavement in a purpose-designed laboratory apparatus. To understand the hydraulic flow conditions and the runoff performance that occurred within two layers of permeable and conventional pavement. The thickness of the permeable layer is 25, 37.5, and 50 mm, and the conventional layer is 80mm. An artificial rainfall covering an area of 1.5 ×1.0 m2 is constructed to study the relationship between surface runoff and subsurface runoff from a permeable pavement under different geometric design parameters of a roadway. Five slopes set at 0.0, 2.5, 5.0, 7.5 and 10 % in a short direction, and four discharge as 20, 40,60 and 80 L/min are tested. The result demonstrated that 50 mm thickness is suitable for permeable asphalt pavement under the most slope, increasing subsurface runoff and decreasing surface runoff water.

Designing mixtures of asphalt with a porous structure to gain good trainability decreases both the propagation and generation of traffic noise. Porous asphalt (PA) mixtures use crushed stone, a small proportion of processing sand, admixtures, and asphalt binders. Therefore, this study aims to examine the impact of adding crumbed rubber into the mix of PA. However, the optimum amount of the binder used in the reference mixture without crumb rubber (CR) and the mixture with 10, 15, and 20% of crumbed rubber waste was identified by utilizing drain down. The test of Cantabro loss, air voids, and indirect tests of tensile and permeability were performed on samples to identify the influence of adding crumbed rubber on the features of the PA mixes. The optimum asphalt content achieved is 6.3%. The results indicated that CR decreases PA permeability, while the additional amount of crumbed rubber in PA negatively influences PA characteristics.

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