Abstract
The article presents one of the main parameters of bitumens used for asphalt concrete mixtures production—viscosity. The authors analyse technological ageing process and its influence on viscosity of selected bitumens. Dependence of the viscosity of bitumens on type and amount of the additives, temperature and ageing is described through experiments. Research findings show that the employment of different types of additives increases bitumen viscosity and positively effect the bitumen ageing resistance. Practical application of presented conclusions and recommendations will enable to improve the main characteristics of asphalt concrete pavements and traffic conditions on roads.
Highlights
All over the world, the most widely spread road pavement is asphalt concrete pavements
In accordance with the definition, viscosity is a ratio of the bitumen shearing stress that arises between two layers during the motion one over the other [3]
The viscosity is the main factor in determining basing on the Bitumen Test Data Chart (BTDC) - the optimal temperature of mixing bitumen with the mineral aggregate and in specifYing the lowest acceptable temperature of compaction within the technological range of temperature
Summary
The most widely spread road pavement is asphalt concrete pavements. They are fi1m, deformative, they have better cohesion with the vehicle wheels and are distinguished in other positive features [I]. Cohesion and viscosity are inversely proportional to temperature; their values decrease with increasing temperature and increase when the temperature decreases. These features of bitumen are very important when applying bitumen in production and utilisation of asphalt concrete mixes. The viscosity is the main factor in determining basing on the Bitumen Test Data Chart (BTDC) - the optimal temperature of mixing bitumen with the mineral aggregate and in specifYing the lowest acceptable temperature of compaction within the technological range of temperature. The higher viscosity at 60 °C, the better deformation resistance [6]
Sign-in/Register to view highlights & summary 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.
