@article{MAKHILLJEAS201813916100,
    title = {Polyethylene Polymer Modified Bitumen: Process Optimization and
Modeling of Linear Viscoelastic Rheological Properties Using
Response Surface Methodology},
    journal = {Journal of Engineering and Applied Sciences},
    volume = {13},
    number = {9},
    pages = {2818-2827},
    year = {2018},
    issn = {1816-949x},
    doi = {jeasci.2018.2818.2827},
    url = {https://makhillpublications.co/view-article.php?issn=1816-949x&doi=jeasci.2018.2818.2827},
    author = {Nura,Ibrahim,Madzlan and},
    keywords = {Modelling,polymer modified bitumen,linear viscoelastic properties,linear low-density polyethylene,optimization,independent variables},
    abstract = {Polymers are generally, applied to improve the durability and performance of asphalt pavement
structures against premature defects. In this study, the optimization of polyethylene polymer for bitumen
modification has been investigated to determine optimum proportions for higher linear viscoelastic properties.
A Response Surface Methodology (RSM) Central Composite Design (CCD) design was applied with two with
two independent variables polyethylene content and temperature and three linear viscoelastic responses
Complex Modulus (CM), Phase Angle (PA) and Viscosity (V). The results showed that a high correlation
coefficient (R<sup>2</sup>) of 0.9998, 0.9962 and 0.9998 were obtained for complex modulus, phase angle and viscosity
which indicates that, the model&#146;s values are in strong correlation with the values of the experiment. The model
also indicates that temperature is the most influencing factor among the two independent variables responsible
for linear viscoelastic properties of the modified binder. Based on numerical optimization using proposed
quadratic model, the optimum mix can be achieved with a 4% polyethylene at a temperature of 25&deg;C.}
    }