Microstructure Analysis and Permanent Deformation of Porous Asphalt incorporating Steel Fiber

Abstract

Porous asphalt composition is frequently used for the surface extraction layer of pavements because to its open structure and high air void percentage, which lessens disturbance and offers protection during precipitation. Porous asphalt composition has a high air void percentage. This would make it possible for water to be stored horizontally inside the pavement layer as well as moved about within that layer. It is possible that this may lessen the impacts of splash and spray, hence improving drivers’ sight during rainstorms. On the other hand, because to the large percentage of air voids contained inside it, the porous asphalt would be prone to rutting, cracking, and peeling. The goal of this research is to explore the microstructure of porous asphalt that has been mixed with steel fibers in proportions ranging from 0 percent to 0.3 percent. The second objective was to analyze the long-term deformation of porous asphalt that had either 0 or 0.3 percent steel fiber content. In this study, a porous asphalt composition was developed with the help of Marshall mix design. Using sieve analysis, the whole mixture of coarse, fine, filler, bituminous binder, and a range of aggregate sizes was separated into its component parts. Pictures taken using a scanning electron microscope (SEM), an energy dispersive x-ray (EDX), an x-ray diffractometer (XRD), and a fourier transform infrared spectrometer (FTIR) are being used in this inquiry (FTIR). The findings point to the possibility that the performance of porous asphalt mixture might be greatly improved by the addition of steel fiber. Additionally, one may make the case that steel fiber has a longer lifespan than the several other forms of fiber that are used in porous asphalt pavement.