Engineering properties of asphalt binder modified with cup lump rubber

12th International Civil Engineering Post Graduate Conference;3rd International Symposium on Expertise of Engineering Design

土木建筑工程

Mohd Azahar, Norfazira^1 ; Abdul Hassan, Norhidayah^1 ; Putrajaya, Ramadhansyah^2 ; Rosli Hainin, Mohd^1 ; Che Puan, Othman^1 ; Athma Mohd Shukry, Nurul^1 ; Azril Hezmi, Muhammad^1

School of Civil Engineering, Faculty of Engineering, Universiti Teknologi, Johor, Johor Bahru

81310, Malaysia^1

Faculty of Civil Engineering and Earth Resources, Universiti Malaysia Pahang, Pahang, Gambang

26300, Malaysia^2

关键词: Asphalt binders;    Engineering properties;    Laboratory test;    Limited information;    Rubber modified asphalt;    Softening points;    Storage stability;    Temperature susceptibility;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/220/1/012014/pdf
DOI  :  10.1088/1755-1315/220/1/012014

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

Polymers are being extensively used for modification of asphalt which yields several key benefits over conventional asphalt. Interest in using natural rubber polymer i.e. cup lump in asphalt modification has increased recently due to fluctuation in natural rubber prices and demand for improved asphalt properties. Since this current innovative road building technique is still new and there is limited information available on this topic, more studies are needed for better understanding the cup lump rubber modified asphalt (CMA). Therefore, this study investigates the engineering properties of the rubberised asphalt binder with 5, 10 and 15% cup lump rubber compared to conventional asphalt binder of 60/70 pen. Laboratory tests, i.e. penetration, softening point, ductility, viscosity, loss on heating and storage stability were performed and compared to the specification. From the results, the addition of cup lump rubber was found to harden the asphalt binder, produced low ductility, high softening point and viscosity resulting in less temperature susceptibility. Remarkably, 5% cup lump rubber gives better performance compared to other rubber percentages.