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A Comparative Study of Different Complex Shear Modulus Master Curve Techniques for Sulfur Extended Asphalt Modified with Recycled Polyethylene Waste

Research Authors
Yasser M.Alghrafy, Sherif M.El-Badawy, El-Sayed M.Abd Alla
Research Department
Research Date
Research Year
2021
Research Journal
International Journal of Pavement Research and Technology
Research Publisher
Springer
Research Website
https://link.springer.com/article/10.1007/s42947-021-00070-w
Research Abstract

This study aims to compare different historical predictive master curve techniques which model the rheological properties of asphalt binders in terms of dynamic shear modulus (G*). The investigated models are the Sigmoidal model, Generalized Logistic Sigmoidal model (GLS), Christensen-Anderson model (CA), and Christensen-Anderson and Marasteanu (CAM) model. These models are applied on virgin and sulfur-extended asphalts (SEA). Two types of recycled plastic waste; recycled high-density polyethylene (RHDPE) and recycled low-density polyethylene (RLDPE) are used to modify both the virgin asphalt and SEA. The investigated models are employed to describe the rheological viscoelastic characteristics of the different investigated binders at different aging conditions under the influence of different frequencies and temperatures based on dynamic mechanical analysis (DMA). The results of this study show that the performance of the investigated models is affected by binder modification and aging conditions. The G* of virgin and sulfur asphalts (either modified or virgin) can be satisfactorily represented by all models investigated in this study under original and aged conditions. The most accurate model is the generalized modified sigmoidal model followed by the Sigmoidal model, the CAM Model, and CA Model, respectively