Investigation the Effect of Polymer Additive on Bitumen Modification in Asphalt Mixtures

In recent years, polymer-modified bitumens have been used to produce asphalt mixtures with better resistance to grooves, fatigue cracks and heat cracks. Research in recent decades has shown that the use of polymers in asphalt mixtures improves their properties and delays breakdowns. The important role of pavement quality on the safety and comfort of road users and also reducing the costs of the operation period, has led researchers in the field of asphalt pavement to produce modified asphalt to increase its resistance and durability against traffic loads and various conditions. Defects in pure bitumen produced in refineries lead to premature failure of asphalt pavements. A variety of additives have been used to modify the behavior of bitumen, including a variety of polymers.Bitumen is one of the most important factors affecting the fatigue performance of asphalt mixtures.Polymer additives as modifiers of bitumen properties and finally asphalt mix have been associated with successful experiments and their basic performance is affected by the physical, chemical and rheological properties of bitumen.