Effect of various filler types on the properties of porous asphalt mixture

International Conference on Innovative Technology, Engineering and Sciences 2018

工业技术;自然科学

Mohd Shukry, Nurul Athma^1 ; Hassan, Norhidayah Abdul^1 ; Abdullah, Mohd Ezree^2 ; Hainin, Mohd Rosli^1 ; Md Yusoff, Nur Izzi^3 ; Jaya, Ramadhansyah Putra^1 ; Mohamed, Azman^1

Faculty of Civil Engineering, Universiti Teknologi Malaysia, Johor, Malaysia^1

Faculty of Civil and Environmental Engineering, Universiti Tun Hussein Onn Malaysia, Johor, Malaysia^2

Department of Civil and Structural Engineering, Universiti Kebangsaan Malaysia, Selangor, Malaysia^3

关键词: Chemical compositions;    Coating properties;    Energy dispersive x-ray;    Field emission scanning electron microscopes;    Indirect tensile strength;    Polymer-modified binders;    Porous asphalt mixtures;    Superpave gyratory compactors;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/342/1/012036/pdf
DOI  :  10.1088/1757-899X/342/1/012036

来源: IOP

【 摘 要 】

The open structure of porous asphalt exposes a large surface area to the effects of air and water, which accelerates the oxidation rate and affects the coating properties of the binder. These factors may influence the adhesive strength of the binder-aggregate and lead to cohesive failure within the binder film, contributing to aggregate stripping and moisture damage. The addition of fillers in asphalt mixtures has been identified to stiffen the asphalt binder and improve mixture strength. This study investigates the effect of various filler types (hydrated lime, cement, and diatomite) on the properties of porous asphalt. Compacted samples of porous asphalt were prepared using Superpave gyratory compactor at the target air void content of 21%. Each sample was incorporated with 2% of filler and polymer-modified binder of PG76. The morphology and chemical composition of fillers were investigated with a field emission scanning electron microscope (FESEM) and energy dispersive X-ray (EDX) analysis. The properties of porous asphalt were evaluated in terms of permeability, abrasion loss, resilient modulus, and indirect tensile strength. All mixtures were found to show high permeability rates. Mixtures with hydrated lime exhibited lower abrasion loss compared to mixtures with cement and diatomite. The use of diatomite increases the resistance of the mixtures to rutting and moisture damage compared to other fillers as shown by the enhanced resilient modulus and indirect tensile strength.