Laboratory Evaluation of the Effect of Warm Mix Asphalt Additive on the Performance of Bitumen and Asphalt Mixture Containing Polypropylene Waste and Nanoclay

Author

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

Abstract

The improvement of asphalt materials to develop the overall performance of bitumen and asphalt mixtures has been the focus of several researches that have been carried out in the past few decades. Using plastic waste in asphalt modification is one of the measures taken in this direction. The use of waste materials in the construction of pavements not only improves the properties of asphalt, but also significantly saves the cost of pavement materials and helps to solve the problems of disposing of such waste materials that can cause water pollution. Become soil and air, they are dangerous. Therefore, in this research, the effect of semi-heated asphalt additives, nanoclay and polypropylene waste on the performance characteristics of bitumen and asphalt mixtures was evaluated. In the present research, nanoclay (3% bitumen weight), polypropylene waste (1%, 2% and 3% bitumen weight) and 2 semi-heated additives (2% Sasobit and also 0.3% Zycotherm) were used to modify pure bitumen (85/100). ) used. Several bitumen rheological tests and mixture performance tests were conducted. The results of the bitumen rheological behavior test showed that the addition of composite additives leads to an increase in the high temperature behavior of bitumen. Bitumen storage stability test also showed that using nanoclay improves the storage stability of polypropylene-containing bitumen. The rutting resistance of bitumen increases with the addition of nanoclay and polypropylene. In addition, nanoclay and semi-heated additive can increase the fatigue behavior of polypropylene modified bitumen. The results of the sample test showed that the use of polypropylene, semi-warm additives and nanoclay improves the performance characteristics of bitumen and asphalt mixtures.

Keywords

References

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