Investigation of the Effect of Polymers on the Binder and Porous Asphalt Mixtures

Document Type : Original Article

Authors

1 Ph.D., School of Civil Engineering, Iran University of Science and Technology, Tehran, Iran.

2 Professor, School of Civil Engineering, Iran University of Science and Technology, Tehran, Iran.

Abstract

The safety and convenience of road users have been affected straightly by the pavement surface condition, which would be more serious in special weather conditions. The reduction in skid resistance between tire and pavement surface, splashing, spray, unpleasant light reflection and reduce in driving safety can be count as consequence of water existence on the road surface. Porous Asphalt are using as permeable surface layer which can increase the safety and reduce the noise pollution. This study is focusing on modified porous asphalt with two different types of polymers, one elastomer and one plastomer. The samples has been prepared with 85-100 penetration grade bitumen, lime aggregates, stone powder filler and SBR and EVA polymer in two different content (4 and 5 percentage of bitumen weight). The penetration test, rotational viscosity and elastic recovery test has been performed on the modified bitumen. Moreover, the porous asphalt samples have been tested by resilient modulus test, indirect tensile stress test and wheel track test. Results of bitumen tests shows enhancement in stiffness, viscosity and flexibility of bitumen which improves the bitumen’s performance. In addition, asphalt mixture test results show higher cohesion and adhesion in porous asphalt compared to the control sample, which is the reason of improvement in moisture sensitivity and rutting. Among the all tested samples, the SBR modified samples shows a better performance.

Keywords

References

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Journal of Transportation Research
Volume 16, Issue 4 - Serial Number 61
December 2019
Pages 165-176

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