The environmental, social and economic sustainability of our infrastructure network is clearly of paramount importance to the roadengineering sector as well to society at large. Sustainable road materials and reduced transport of those materials therefore play a significant role. Cold mix asphalt (CMA) emulsion technology could be one of the better options for the road industry to explore more ...

in this study an empirical model which can be used to predict the rutting parameter (g*/sinδ) for neat and powder rubber modified bitumen describes. the model was developed using 36 unique powder rubber modified bitumen combinations, rubber concentrations were varied at 5% intervals between 5 and 20%. the effects of powder rubber particle size on model accuracy were also studied ultimately a mo...

in this study, different contents of nano-silica, 2 wt.%, 4 wt.% and 6 wt.%, have been added to bitumen tomodify the physical, mechanical and rheological properties of warm mix asphalt (wma). wma iscontaining 2 wt.% of sasobit (mixture of long-chain hydrocarbons). various quality control tests have beencarried out to characterize the modified bitumen and wma. the rheological investigations show...

in this investigation, the mechanical properties of the blends of blown bitumen110/10, heavy vacuum slops (h.v.s), bitumen 60/70 penetration grade and isotactic polypropylene (ipp) were studied for the first time. our results showed that modulus varies non-linearly and at certain asphaltenes contents a peak appears. considering these phenomena it is revealed that in the absence of ipp, interact...

Lindberg SW1*, Agner T2 and Pedersen EB1 1Department of Occupational and Environmental Medicine, University of Copenhagen, Bispebjerg Hospital, 2400 Copenhagen NV, Denmark 2Department of Dermatology, University of Copenhagen, Bispebjerg Hospital, 2400 Copenhagen NV, Denmark *Corresponding author: Sara Lindberg, Department of Occupational and Environmental Medicine, Bispebjerg Hospital, Denmark,...

The cold in-place recycling (CIPR) is a process where the existing bituminous pavement is recycled without application of heat. In CIPR process the scarified material from the existing pavement is crushed to the required gradation and binder in cold form (emulsion or cutback or foamed bitumen) is added. Externally acquired Reclaimed Bituminous Pavement (RBP) or fresh aggregates are also added d...

Road construction is an important part of economic development, and the most pressing problem improving quality road surfaces. pavements are a combination mineral fillers bitumen, in which bitumen used as durable waterproof binder. Bitumen modification can improve by increasing plasticity interval, adhesion to metal materials, resistance aging, expanding operating temperature range. Softening p...

Tar bitumens are increasingly being used as a binder in road works. They consist of a standard product of about 70% bitumen and 25-30% tar. Tar bitumens are classifiable as the pyrolysis products of organic materials and are applied hot. Depending on the temperature used there are emissions of various intensities of polycyclic aromatic hydrocarbons (PAH), some of which are carcinogenic. A total...

• Molecular pull-off simulation of bitumen-aggregate interface was performed. Cohesive debonding percentage rises with bitumen film thickness and temperature. Less cohesive more adhesive occur at higher velocities. Stronger alkaline minerals are prone to have debonding. When an asphalt mixture cracks, occurs along bitumen-mineral interfaces within films. At microscale, the two processes can hap...