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MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
MSCR Method, Testing & Analysis
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MSCR Method, Testing & Analysis

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

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

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  • 1. Multiple Stress Creep Recovery A review of the technology, test set up and analysis. Presenter: John Casola, Asphalt Market & Products Manager
  • 2. Outline <ul><li>Selected excerpts from the recent Binder ETG </li></ul><ul><ul><li>Paper by John D’Angelo & Raj Dongre’ providing background of the method. Discussion of the relationship to Rutting & Elastic Recovery </li></ul></ul><ul><li>Specifics of the testing procedure </li></ul><ul><ul><li>Multiple Stress Creep Recovery </li></ul></ul><ul><li>How to set up and perform the testing </li></ul><ul><ul><li>Understanding the test & results </li></ul></ul><ul><ul><ul><li>Creep and Creep Recovery </li></ul></ul></ul><ul><ul><ul><li>Analysis </li></ul></ul></ul>
  • 3. Selected Excerpts from the Binder ETG
  • 4. Overview of the premise: By: John D’Angelo & Raj Dongre’
  • 5.  
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  • 7. Relationship <ul><li>Modulus </li></ul><ul><li>Stress </li></ul><ul><li>G = --------- </li></ul><ul><li>Strain </li></ul><ul><li>Compliance </li></ul><ul><li>Strain </li></ul><ul><li>J = --------- </li></ul><ul><li>Stress </li></ul>
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  • 20. Procedures are available for use from both ASTM & AASHTO
  • 21. Testing Procedure
  • 22. Multiple Stress Creep Recovery (MSCR) <ul><li>Applied Stress 100Pa for a 1 second Creep period </li></ul><ul><li>Remove the Stress for a 9 second Recovery period </li></ul><ul><li>Repeated for a total of 10 cycles </li></ul><ul><li>Applied Stress 3200Pa for a 1 second Creep period </li></ul><ul><li>Remove Stress for a 9 second Recovery period </li></ul><ul><li>Repeated for a total of 10 cycles </li></ul><ul><li>Goal it investigate differences in linear & non-linear performance of the binder. </li></ul>
  • 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
  • 36. Create Creep/Creep Recovery <ul><li>100Pa; 25mm plates </li></ul><ul><ul><li>Repeat 9 times </li></ul></ul><ul><ul><li>1 Sec Creep Time </li></ul></ul><ul><ul><li>Linear </li></ul></ul><ul><ul><li>10 Data points </li></ul></ul>
  • 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’
  • 44. Create Creep/Creep Recovery <ul><li>3200Pa; 25mm plates </li></ul><ul><ul><li>Repeat 9 times </li></ul></ul><ul><ul><li>1 Sec Creep Time </li></ul></ul><ul><ul><li>Linear </li></ul></ul><ul><ul><li>10 Data points </li></ul></ul>
  • 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
  • 53. In Conclusion <ul><li>Expect to see the specification released in the next 12 months. </li></ul><ul><li>For any questions, feel free to call or email me or the Malvern Help Desk for any assistance. </li></ul><ul><li>In the USA +1 508-480-0200 x 350 </li></ul>
  • 54. Thank you for your interest & time! Contact information <ul><li>Presenter: </li></ul><ul><ul><li>John Casola (US based) </li></ul></ul><ul><ul><li>(+1) 973-740-1543 </li></ul></ul><ul><ul><li>[email_address] </li></ul></ul><ul><ul><li>US Helpdesk: (+1) 508 480 0200 </li></ul></ul><ul><li>Thank you for joining us!!! </li></ul><ul><ul><li>An audio recording of this presentation will be available on the Malvern website soon. Check back with us regularly for future relevant seminars! </li></ul></ul><ul><ul><li>www.malvernevents.com On-Demand Presentations </li></ul></ul>

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