Effects of Cross Linking Agents on Stability amp Rheological

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Hypothesis and Objective,Hypothesis,Cross linking of elastomeric polymers used for. bitumen modification can significantly increase value. of such polymers, Evaluation of effectiveness of various cross linking. agents in improving stability rheological properties. of modified binders,The New Grading System M332,PG xx z yy. 1 Climate xx yy,2 Traffic conditions Trucks S H V E Traffic. 3 Reliability and Volume,4 Modification Speed,PG 76 E 10.
Performance,Grade Summer Winter,Average 7 day Min pavement. max pavement design temp,design temp,Middle East Region PG grading Requirements. Source Eng M S Aazam MOT KSA 2006,Multiple Stress Creep and Recovery MSCR. ASTM 7045 10 AASHTO T350,MSCR B5 46 C,Creep stress 0 1 10. kPa 3 2 kPa,10 cycles 1,1 sec constant creep,g 0 1 Stress 3 2 kPa.
9 sec zero stress,Output Creep Stress 0 1 kPa,Model Prediction. compliance Jnr 0 001,and Percent 0 25 50 75 100 125 150 175 200. Recovery R at 0 1 time s,kPa and 3 2 kPa,1 AASHTO MP19 Specifications. Based on NCHRP 9 10 Project Report 459,Rolling Thin Film Oven Residue T 240. Mass change max percent f 1 00,MSCR T350 Traffic Grades Test Temperature.
G 6 8 times Higher,Standard Traffic S Grade,Jnr3 2 max 4 0 kPa 1 Jnrdiff max 75. Heavy Traffic H Grade,Jnr3 2 max 2 0 kPa 1 Jnrdiff max 75. Very Heavy Traffic V Grade,Jnr3 2 max 1 0 kPa 1 Jnrdiff max 75. Extremely Heavy Traffic E Grade,Jnr3 2 max 0 5 kPa 1 Jnrdiff max 75. Advanced Performance Grading System,for Qatar AASHTO MP19.
Direct and effective consideration of Traffic,Adjusting the Jnr limits Measured at. Environmental Grade,Traffic Volume,Traffic Speed Load Rate. Design ESALsa,Million Standingb Slowc Standardd,0 3 to 3 H Standard S. 3 to 10 V High H,10 to 30 E Very high V,30 E Extremely high E. b Standing Traffic Average traffic speed is 20 km h C Slow Traffic Average traffic. speed 20 to 70 km h d Standard Traffic average traffic speed is 70 km h. Materials to Produce PG 76 E 10,One bitumen 60 70 Pen Grade from Middle East.
Source PG 64,One Target Modified Grade PG 76 E 10,2 Polymers. Elastomer Linear and Radial SBS,Functionalized Oxidize PE. 7 Cross Linking Agents,Sulfur based,Non sulfur based. Cross Linking Agents Used,Cross linking CL1,CL2 CL3 CL4 CL5 CL6 CL7. Agent Sulfur,Physical State FP FP FP Gel FP FP FP, Color Yellow Yellow Yellow Yellow Yellow Yello brown Yello brown.
2 07 1 59 1 54 NA NA 1 1 1 1,Melting Point,113 82 63 NA NA 107 107. H2O Not very,IS IS IS IS Partially Partially,Solubility soluble. Odor MO C C C MO MO MO, Values obtained from manufacturer s specification FP Fine Powder IS Insoluble. C Characteristic MO Mild to odorless,Trail Testing with Sulphur CL1. Convert 60 70 Pen to PG 76 E 10, To select Elastomer and Functionalized Polyethylene to be used.
PMB Elastomer F Polyethylene Cross linking Agent,1 4 0 0 1 CL1. 2 4 1 5 0 1 CL1,6 4 1 5 0 225 CL1,8 4 5 1 0 225 CL1. 9 3 5 1 5 0 225 CL1, Neat Bitumen Radial Elastomer Note All are by weight of neat bitumen. Results of Initial Trial Testing,4 Elastomer and 1 5. Polyethylene Selected,Experimental Plan Second Phase.
None to 0 3 CL Vary Curing Time,Binder Elastomer Polyethylene Cross linking Agent. 3 4 1 5 0 1 CL1,4 4 1 5 0 225 CL1,5 4 1 5 0 1 CL2,6 4 1 5 0 1 CL3. 7 4 1 5 0 25 CL4,8 4 1 5 0 1 CL5,9 4 1 5 0 1 CL5 with extended curing. 10 4 1 5 0 225 CL5 with extended curing,11 4 1 5 0 3 CL6. 12 4 1 5 0 3 CL7, Neat Bitumen Note All are by weight of neat bitumen.
Testing Methods,Evaluation,Test Method Standards Test Conditions. Parameters Response,AASHTO T 316 Test Temperatures C 135. Rotational,or Viscosity Speed rpm,Viscometer RV,ASTM D 4402 1 20 100. Multiple Stress Test Temperatures C 76,AASHTO TP70 or Jnr and. Creep Recovery Stress Levels kPa,ASTM D7405 Stress Sensitivity.
MSCR Test 0 1 3 2,Test Temperatures C 76,Storage Stability ASTM D5892 Stress Levels kPa. Stress Sensitivity,RV Results,RE Sulfur is the only failure. Effects of Cross Linking Agents on Stability amp Rheological Properties of Polymer Modified Bitumen Tirupan Mandal Ryan Sylla and Hussain Bahia University of Wisconsin Madison USA Shayan Barmand RAETEX Doha Qatar Stockholm Sweden June 15 2015 6th Conference of the European Asphalt Technology Association Hypothesis and Objective Hypothesis Cross linking of elastomeric polymers used

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