Background to Multiple Stress Creep Recovery for AASHTO TP-70 & ASTM M320

1. Multiple Stress Creep Recovery A review of the technology, test set up and analysis. Presenter: John Casola, Asphalt Market & Products Manager

3. Selected Excerpts from the Binder ETG

4. Overview of the premise: By: John D’Angelo & Raj Dongre’

20. Procedures are available for use from both ASTM & AASHTO

21. Testing Procedure

23. Applied Stress Loading

24. Accumulated Strain from Repeated Loading

25. Accumulated Strain from Repeated Loading on a Modified Binder

26. Example of a Newtonian material Neat binder PG64-28 tested to MSCR at 64 o C Jnr 3200 Jnr 100

27. Example of a Visco-Elastic Binder Modified binder PG70-28 tested to MSCR at 70 o C 100Pa 3200Pa Jnr 3200 Jnr 100

28. Neat Binder; Max Strain ~60% PG 64-28 at 100Pa

29. Neat Binder; Max Strain ~2000% PG 64-28 at 3200Pa

30. Polymer Modified Binder; Max Strain ~30% PG 70-28 at 100Pa

31. Polymer Modified Binder; Max Strain +700% PG 70-28 at 3200Pa

32. Calculations

33. Reporting

34. Setting Up Malvern Software

35. Creep / Creep-Recovery Mode

37. Creep Un-check Default sampling Set to 100 Set to 1 Click to Linear Set to 1 Set to 10 for every 0.1s

38. Recovery Un-check Default Sampling Click to Linear Set to 9 Set to 20 for every 0.45s Perform Recovery

39. Temperature

40. Temperature

41. Temperature Options Un-Check All

42. No of Repeats

43. Save the Parameter File as ‘100pa’

45. Change Creep Stress to 3200 Just change to 3200

46. Save the Parameter as 3200pa

47. Job Stream Icon for Test Sequencing

48. Add the saved Parameter Files to Script Give it the name MSCR

49. Run the Test

50. Or, Save Script to Add on User Page

51. Add to User Page

52. Or, link to another test for automated testing