Investigation of design parameters of permeable asphalt mixtures contai̇ni̇ng waste materi̇als modified with fiber additives

In areas where urbanization is intense, rainwater is mostly collected on impermeable surfaces and leakage into groundwater is prevented. Permeable coating applications, which can be qualified as environmentally friendly especially for residential areas, greatly reduce the runoff, keep the rainwater clean and allow groundwater to be fed through infiltration. Permeable Coatings reduce environmental noise pollution due to their porous structure. Considering these benefits, it is clear that these coatings will help make cities more suitable for human nature. On the other hand, there is a need to improve the performance of these coatings, which have a short service life due to their porous structure. In this study, in order to contribute to the more widespread use of permeable asphalt, it was considered to improve the performance of the coating mixtures by using basalt fiber polypropylene, glass fiber and crumb rubber without compromising the hydraulic permeability level. The slag material released during the ferrochrome production process was used as aggregate in the permeable asphalt mixture design. With the recycling of ferrochrome slag in an area suitable for its properties, optimum benefit is aimed in economic and environmental terms. In the study, besides the ferrochrome slag obtained from Elazığ Ferrochrome Plant and polymer bituminous binder (PMB 76-22), F-type fly ash as filler addition and cellulosic fiber for bitumen stabilization were used. In the study, a mixture design was carried out for ferrochrome slag aggregate. The effects of the addition of polypropylene, basalt fiber, glass fiber and crumb rubber at the rates of 0.2%, 0.4%, 0.6%, 0.8% and 1,0% of mixture weight on the blend performance at 6.0% and 6.5% bitumen rates where the best design results are achieved has been determined. Design tests such as volume analysis, permeability, Cantabro abrasion loss, indirect tensile strength and resistance to moisture damage were carried out on the prepared samples.