Finding the Optimum Mixing Time for Reclaimed Rubber Modified Bitumen by Assessing the Rotational Viscosity and Rheological Properties

Modifying the mixing process between bitumen and crumb rubber and conducting it to reach the product with high quality are important so elevating energy efficiency will be attainable. Mixing conditions have certain effects on interaction between bitumen and crumb rubber. Optimizing mixing condition is the most important property which is surveyed in this research. The results of the rotational viscosity test indicate that changes the mixing time caused some changes in the final products properties. These effects of mixing time are not linear thus excessive mixing time could harm desired characteristics. The aim of this study was to evaluate how mixing time could affect the viscosity and to define and find the optimum mixing time. Rheological analysis shows that the addition of this type of modifier would increase High temperature Grade also would improve the rutting susceptibility.

Keywords:

Modified bitumen , crumb reclaimed rubber , optimum mixing time , Rotational viscosity , Rutting resistance