Abstract
When the filler–bitumen ratio of asphalt mortar changes, its adhesion and viscoelasticity will also change, as well as its mechanical performances, such as fatigue durability at normal temperature and low-temperature ductility. Thus, the filler–bitumen ratio directly affects the asphalt mortar’s performance. This paper tested the physical indexes of the No. 70 matrix asphalt mortar modified by additive Sasobit (SB) and Sasowam (SW) through dynamic shear rheometer and bending beam rheometer under different temperature conditions, and comprehensively analyzed the high-temperature anti-rutting and fatigue performance, low-temperature crack resistance performance, and ductility of asphalt mortar. The results show that ore powder not only can increase the anti-rutting factor but also can increase the aging resistance of asphalt. SB has better performances than SW at high temperatures. As for the filler–bitumen ratio of asphalt mortar with additive SB, the recommended value is between 0.8 and 1.2, and the value may be a little larger for that with SW.
Highlights
Asphalt is often the choice of highway pavement material in the world
The results show that ore powder can increase the anti-rutting factor and can increase the aging resistance of asphalt
The overloaded vehicles will cause the early damage of asphalt pavement, including high-temperature rutting, low-temperature cracks, subsidence, potholes, etc
Summary
Asphalt is often the choice of highway pavement material in the world. With the traffic growth, the overloaded vehicles will cause the early damage of asphalt pavement, including high-temperature rutting, low-temperature cracks, subsidence, potholes, etc. Zhang et al [7] studied the asphalt mortar property with SHRP equipment dynamic shear rheometer (DSR) and bend beam rheometer (BBR), tested and analyzed the effect of filler–bitumen ratio on performance of mortar at high and low temperatures in 2004; and they recommended that the filler–bitumen ratio should not exceed 1.4 for high-temperature performance and not exceed 1.0 for low-temperature performance. They did not give the minimum value of filler–bitumen ratio, and did not consider additive in asphalt. A filler–bitumen ratio of asphalt mortar is recommended
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
