Permanent Deformation of Polymer Modified Porous Asphalt

Hydroplaning phenomenon in rainy areas has caused the reduction of safety in the roads. Using a layer of porous asphalt with void about 18% can drain the water from the road and send it out, It also can decrease sound pollution. Low stability and durability and mechanical characteristics of this asphalt and high permanent deformation are limitations of porous asphalt. In these study effects of SBR and APP polymers on porous asphalt regarding permanent deformation was evaluated.
Choosing the best aggregate for creating void above 18% and mix design of asphalt through use of cantabero method were the important parts of the study. The results of experiments showed that adding polymer increases specific weight, improving percentage of the void in asphalt, and amplifying strength and stability of porous asphalt.
During the creep test, it was determined that porous polymer modified bituminous mixtures will have the least primary and permanent deformation than the specimens were made with pure bitumen. Adding polymer causes more amount of viscoelastic recovery, increase of stiffness modulus in all temperatures and all stresses and also decreases of creep deformation in porous asphalt.