Abstract:
Pavement with long service life and low maintenance and rehabilitation
costs are favored; thus, the need for high-quality bitumen is growing. This situation
has led to the use of polymers as modifiers to enhance the properties of pavement to
be more resistive to high temperature and stress during service life. Recently natural
rubber in coagulated form has been identified as a biopolymer due to its high resilience
and elastomeric properties. Therefore, this research was conducted to investigate the
physical and rheological performance of bitumen with cup lump natural rubber with
four percentages (3, 6, 9 and 12%) by weight of bitumen. The raw rubber was
processed and treated before blending with bitumen. The modified bitumen was
tested for physical and rheological properties. The incorporation of cup lump rubber
decreased the penetration and increased the softening point. Furthermore, it also
enhances the rheological properties in term of complex modulus (G*) and phase
angle (δ).
