Effect of Waste Crumb Rubber on Selected Properties of Bitumen

Nabiha Syed; Asim Mushtaq; Raza Muhammad Khan; Asra Nafees; Zaeem Uddin Ali

Nabiha Syed Polymer and Petrochemical Engineering Department, NED University of Engineering and Technology, Karachi, Sindh, Pakistan
Asim Mushtaq Polymer and Petrochemical Engineering Department, NED University of Engineering and Technology, Karachi, Sindh, Pakistan
Raza Muhammad Khan Polymer and Petrochemical Engineering Department, NED University of Engineering and Technology, Karachi, Sindh, Pakistan
Asra Nafees Polymer and Petrochemical Engineering Department, NED University of Engineering and Technology, Karachi, Sindh, Pakistan
Zaeem Uddin Ali Chemical Engineering Department, NED University of Engineering and Technology, Karachi, 75280, Pakistan

Keywords: waste crumb rubber,bitumen,asphalt mixture, Marshall stability value, volumetric properties

Abstract

In recent years the road surface conditions in Pakistan have been getting worse day by day, like rutting, thermal cracking and increased resistance to many forms of traffic-induced stress can be seen. There should be more concern about durability. Polymer modification of bitumen has become the optimal technique in designing better performance of pavements. Working with polymer modified bitumen is an excellent solution to this and a lot of work with various polymers has either been done or in the pipeline. The advantage of polymer modification of bitumen is that offers enhancements in performance and durability, qualifying of pavement distress and reduced life cycle costs when it is differentiated to unmodified bitumen or hot mix bitumen surface dressings.This study considers the sustainable pavement method when recycled rubber is taken from window fittings in crumbed form is mixed with a hot bitumen mixture. The main objective was to inspect the impact of adding recycled crumbed rubber to the bitumen mixture. The dry process method was used in which four different crumb rubber contents (1%, 3%, 5% and 7% wt.) in the asphalt mixture were investigated. The working temperatures to mix the crumbed rubber in the hot bitumen were around 180 °C-190 °C. Considering the Marshall stability esteem and the volumetric properties, acomparative study was done amongst the unmodified bituminous mixture and whole bituminous concrete mixtures. The results introduced that crumb rubber is an added substance in the asphalt mixture, as all the results are inside the normal pre requisites. The crumb rubber addition to the asphalt mixture would loseits strength and quality. It would be more worried about the sturdiness of the asphalt mixture since the crumb rubber in asphalt content changed its properties and can be utilized in additional exploration.