9231

8533

كارشناسي ارشد

راه و ترابري

اصفهان: دانشگاه صنعتي اصفهان، دانشكده عمران

1393

[پانزده]، 101ص.:مصور، جدول، نمودار

ص. ع. به فارسي و انگليسي

مهدي ابطحي

عبدالرضا حاجي پور

7/8/93

مهدي حجازي، محسن ابوطالبي اصفهاني

مهندسي عمران

ID8533

112 Performance Evaluation of HMA Constructed Using Modified Sulfur Bitumen and Reinforced with Polypropylene Fibers Amir Kheirollahi Najafabadi Amir kheirollahi@ymail com Date of Submission 05 20 2014 Department of Civil Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisors S M AbtahiAbstractSulfur is one of those chemical materials that is used in the different industries frequently butconsiderable volume of it is produced because of industrial and volcanic processes all over theworld and this amount is excessive On the other hand reserving this volume of sulfur in ausual place is dangerous because of being flammable and toxicity So finding a goodapplication of this material is a vital problem for factories One of the best places to use that is in making the road pavements better and modifying bitumen specifications Although thatusing sulfur in bitumen makes its features better totally in this situation beside of theprobability of pollution and causing fire produced asphalt concrete will be harder and morebrittle So nowadays using some materials in asphalt concrete to solve this problem is usual In this study the application of usual sulfur that is modified by a specific procedure and isnamed Modified or Odorless Sulfur is assessed in the in the combination with the bitumen by Dynamic Shear Rheometer Test and in the asphalt concrete by Marshal Test For this beside of the replacement of the bitumen by 5 10 15 and 20 percent of sulfur by the weightof the bitumen Polypropylene PP fibers is used to prevent the asphalt concrete fromhardening and being brittle The bitumen that is used to making asphalt concrete samples is replaced by 10 20 25 30 35and 45 percent of sulfur by total weight of samples The percentage of PP fibers is 0 15 0 3 0 5 and 1 percent of sample s total weight The used fiber s length is 12 and 18 mm Results show that using 10 15 sulfur in the bitumen improves the properties of thecombination considerably Beside of this using 20 30 sulfur in the bitumen that is usedin making asphalt concrete samples and the application of 0 3 0 5 of 12 mm PP fibers improves strengthening properties of samples and makes produced asphalt concrete moreeconomical Keywords Modified Sulfur PP Fibers Modified Bitumen Sulfur Asphalt Concrete AsphaltConcrete Reinforcing

مهدي ابطحي

عبدالرضا حاجي پور

مهدي حجازي، محسن ابوطالبي اصفهاني