Abstract
Rainwater that is not properly collected causes stagnant water, where the water will be polluted by pollutants and contaminants. Thus, it is necessary to innovate to increase the availability of clean water using porous asphalt which is researched to reduce pollutants in polluted water. In this study, filtration of rainwater and stormwater runoff will be carried out using porous asphalt as a filter media with six different filtrate variations. Parameters analysed were pH, Total Dissolved Solids (TDS), and conductivity. The tests carried out were Optimum Asphalt Content (OAC) testing using the Marshall test method with a percentage of asphalt content used was 4-6%, Cantabro Loss testing, porosity, and permeability tests on porous asphalt specimens, as well as testing the filtration effect of porous asphalt. Rainwater and stormwater runoff that flowed through porous asphalt samples without the addition of filter media increased pH, TDS, and conductivity. In rainwater and stormwater runoff filtration, the highest increase in pH occurred in variation 3, namely porous asphalt + aggregate + limestone. The largest reduction in TDS and conductivity values occurred in Variation 7, namely porous asphalt + aggregate + coconut shell activated carbon + sponge + cotton.
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