Investigation the Physical and Rheological Properties of Bitumen Modified with Warm Mix Asphalt Additive

Authors : İslam GOKALP

Pages : 182-189

Doi:10.36222/ejt.966398

View : 18 | Download : 3

Publication Date : 2021-12-30

Article Type : Research Paper

Abstract :Bituminous binders constitute 4-7% of the flexible pavements by weight play an important role on the structural and functional performance of pavements. Traditional hot mix asphalt insert ignore into journalissuearticles values(HMA); production is done at 150-190 °C that results high-energy usage, smoke and odor emission therefore significant cost loss and environmental damage. Increasing environmental awareness has questioned whether HMA can be produced at lower temperatures. Consequently, warm mix asphalt insert ignore into journalissuearticles values(WMA); and cold asphalt applications were developed as alternatives. WMA applications researched within the scope can be done by using organic, chemical additives or foaming methods. WMA is generally an application based on the reduction of the viscosity of bitumen. The aim was to modify the base bitumen by adding WMA additive called Sasobit, the most widely used chemical product in the world, ranging from 1% to 5% and investigate the changes in physical and rheological properties of bitumen. In this research, penetration, softening and flash point, viscosity tests were applied, thermal sensitivity was analysed, and rheological properties of base and short-term aging from, which required high-temperature grade of bitumen, were investigated using dynamic shear rheometer. Eventually, Sasobit modification significantly changed all studied properties of bitumen except of flash point.
Keywords : Bitumen, Modification, Polymer, Sasobit, Warm mix asphalt