The effect on the asphalt bitumen modifiers

Is not responsible for the viscoelastic properties of the asphalt pavement performance is particularly big role in determining the resistance to permanent deformation and leave the game. Overall, the proportion of imported stretch of asphalt that is related to the viscosity of such irreversible (non-recoverable), an increase in temperature and loading time (loading time) increases. This effect on the part of a and b are shown. Asphalt is an example of a response to a simple tensile test shows. Tension caused by the use of time, a rapid elastic response, followed by a slight increase in tension with time shows up when times be removed. Change stretch remnants due to the viscous behavior of the material. By removing the load, elastic stretch immediately recovered and excess recovery happens remnants. This phenomenon is called the elasticity of delay (Delayed elasticity) is known. Finally, an additional tension remains that non-recyclable and this is directly due to the viscous behavior.

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Call one pavement to the pulse of the traffic load is shown in Figure b. The distinction between the two pieces of elastic response may not be permanent but a little stretch and a great stretch elastic is shown. The drive to continuously shown in Figure b for a single pulse load is small while millions of times on the road and a massive accumulation will happen. The detail that can be deformed. According to what was said, it is clear why deformation at high temperatures and when traffic is slow or static environment is more happening.
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One of the first roles of bitumen modifier increased resistance to permanent deformation at high temperatures asphalt road have a negative effect on the properties of bitumen and asphalt have at other temperatures. This can be achieved in two ways, both of which are permanent way of reducing the tension. The first way is hard so that the overall response of viscoelastic asphalt bitumen decreased. The second method increases the elastic component is viscous bitumen that reduces component.
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Increase the difficulty of tar-like bitumen dynamic stiffness is increased. This improves the flow of materials, increasing the strength of the structure and extend the life of asphalt is desired. Also, by employing thinner layers can be achieved strength similar structure. Increasing component Bitumen increases the flexibility of asphalt is elastic. Increased flexibility in cases where the tensile strain (strain) is much better.