Evaluation of Rutting Resistance of Binder and Mixture Containing Gilsonite, Crumb Rubber and Warm Mix Additives

Document Type : Original Article

Authors

1 Assistant Professor, Department of Civil Engineering, University of Science and Technology of Mazandaran, Behshahr, Iran.

2 Ph.D., Student, Department of Civil Engineering, University of Science and Technology of Mazandaran, Tehran, Iran. (Chief Executive Officer of Ara Tarh Royan Company, Tehran, Iran)

Abstract

Rutting is one of the most important pavement failures that occur due to the accumulation of irreversible strains in the path of the wheels. Various factors are effective in causing this type of failure, one of which is the insufficient strength of the asphalt mixture. One of the ways to improve the strength of asphalt mix is ​​to use different additives. Therefore, in this study, the effect of semi-hot asphalt additives, rubber powder and gilsonite on bituminous resistance of bitumen and asphalt mixture was evaluated. In the present study, gilsonite, rubber powder and 2 semi-hot additives (3% Sasobit and also 0.3% Zycotherm) were used to modify pure bitumen (AC-85/100). Several bitumen rheological tests and mixed functional tests were performed. The results of rheological behavior test showed that the addition of synthetic additives leads to an increase in the high temperature behavior of bitumen. The fuzzy separation of the bitumens gets worse. The grooving strength of bitumens increases with the addition of gilsonite and semi-hot additives. In addition, rubber powder can increase the fatigue behavior of Gilsonite-modified bitumens. In addition, CR can increase the corrosion resistance of Gilsonite-modified bitumen containing Gilsonite. The results of sample testing showed that the use of gilsonite,
semi-hot additives and rubber powder increases the grooving strength of asphalt mixtures.

Keywords

References

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Journal of Transportation Research
Volume 19, Issue 3 - Serial Number 72
February 2022
Pages 283-304

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