Abstract
Porous asphalt paving is a modern design method that differs from the usual asphalt pavements' traditional designs. The difference is that the design structure of porous pavements allows the free passage of fluids through their layers, which controls or reduces the amount of runoff or water accumulated in the area by allowing the flow of rain and surface runoff. The cross-structure of this type of paving works as a suitable method for managing rainwater and representing groundwater recharge. The overall benefits of porous asphalt pavements include environmental services and safety features, including controlling the build-up of contaminated metals on the road surface, rainwater management, resistance to slipping accidents, reduced splashing, and spraying pedestrians and drivers.
 In this study, the porous mixture's volumetric and physical properties were tested, and the use of carbon fibers as a type of mixture improver. The results were compared after performing the following steps: Selecting the best gradient for the porous asphalt mixture by selecting the largest proportion of air voids from three gradations group according to specifications (ASTM 7064), then choosing the optimum asphalt ratio according to the standard specifications, which are the value of drain down % and the Cantabro abrasion loss % value, as well as the ratio of air voids. After obtaining the optimum asphalt ratio, samples of the asphalt mixture were prepared. Carbon fibers were added to it at a rate of (0.3%) by weight of the total mix and a length of (2 cm) and prepared samples without additives. They were tested by a Marshall device to calculate the stability and flow value and show the effects of fibers on porous asphalt concrete properties. An increase in the stability value and a decrease in the flow and reduction in the drain down rate during exposure to high temperature were observed for the samples containing carbon fibers, by 48.8%, 44%, and 72%, respectively
Highlights
Sustainable urban drainage pavements (SUDP) are defined as structures that mimic the earth's surface drainage pattern
Carbon fibers are an enhancer for fluid drainage in porous pavements because they absorb free liquid in the mixture, which effectively contributes to getting rid of gaps clogged during high temperatures (Sikora et al, 2015)
9.1.1 Effect of Carbon Fiber on Marshall Properties Because the porous asphalt mixture has a high gaps ratio compared to the usual mixtures, it is subject to oxidation and loss of durability with less time and the idea of adding carbon fibers to the mix to study the volumetric properties and the changes that occur on the results of the tests that contribute to improving their permanence on the one hand and the porous property on the other hand
Summary
Sustainable urban drainage pavements (SUDP) are defined as structures that mimic the earth's surface drainage pattern. The applied porous pavement systems (PPSs) are one of the complete sustainable drainage systems They have attracted attention for many years to provide environmental balance and carry heavy loads on vehicles. By replacing traditional sidewalks with this sidewalk, the number of wet weather accidents can be reduced by more than 75% (Nuruzzaman, 2015) This porous structure consists of a significant proportion of coarse aggregate with less proportion of fine aggregate and filler. Adding durability-enhancing materials in mixtures, especially fibers, is a relatively new idea in porous pavements, and the type of binder is an essential factor. Carbon fibers are an enhancer for fluid drainage in porous pavements because they absorb free liquid in the mixture, which effectively contributes to getting rid of gaps clogged during high temperatures (Sikora et al, 2015).
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
