خواص آسفالت پليمري حاصل از اختالط پس‌مانده تقطير در خالء و ضايعات واحد توليد پلي اتيلن و الستيك استيرن - بوتادي ان‌

The Properties of Polymer-Modified Asphalt Drived from Vacuum Bottom and Wastes of PE and SBR Plants

The polymeric and non-p olymeric petrochemical wastes are environmen tally unfavorable mate rials. We have to found a way to reuse these wastes in a safe manner. In styrene-buta diene rubber (SBR) production plant two maj or wastes are produced one is a fine rub ber powder and the other is recycled N-methyl pyrrolidone (NMP). In high-d ensity polyeth ylene (HDPE) production plant also a low molecular weight poly mer waste is produced which does not degrade in environment eas ily. On the other hand , bitumen is usually blended with thermoplastics, rubbers and an oil to produce polymermodified bitumens. Effect of SBR, PE and NMP wastes on vacuum bottom residue of crude oi l distillation was investigated. The results of penetration , softe ning poi nt and Frass tests revealed the advan tages of SBR and PE wastes at high temperatures and sugges t NMP waste as a good bitumen ex tender. The results of the Marshal test on the prepared polymer-modified hot-mi x asphalt of the optimum formulation highli ght the super iority of its strength and its lower flow as compared with those of standard 60170 penetration grade bitumen.