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Direct Tension Test The Direct Tension Test provides a information - PowerPoint PPT Presentation

Sep 21, 2023 •110 likes •196 views

Direct Tension Test The Direct Tension Test provides a information on facture and strain tolerance of the binder. New low temperature binder Spec. Thermal stress compared to strength Strain at Failure vs Temperature 20 10/20 19 18

  1. Direct Tension Test The Direct Tension Test provides a information on facture and strain tolerance of the binder.

  2. New low temperature binder Spec. Thermal stress compared to strength

  3. Strain at Failure vs Temperature 20 10/20 19 18 EVA_Modified 17 16 15 14 Strain at Failure, % 50/70 13 12 SBS_Modified 11 10 9 8 7 6 5 4 3 2 1 0 -40 -34 -28 -22 -16 -10 -4 2 8 Temperature, °C

  4. Superpave Plus Specifications � The Direct Tension Tester provides information on the strain tolerance and fracture properties of the binder. � The strain at Tcr + 3 ° C can tell a lot about what is in the binder.

  5. DT Strains by Modifier Type PG Grade Modifier Phase Tcr Strain Tcr+ 3 Angle 76-23 Novophalt 82.4 -19 1.63 70-27 SBR/ 3% 75.2 -27 3.22 82-27 SBS/ 4.25% 63.6 -29 3.61 70-25 SBS/ 4% 73.8 -27 3.87 76-29 SB/ 6% 66.5 -29 3.60 70-24 - 87.6 -23 1.64 70-31 EVA GRF 79.1 -33 1.57 70-31 EVA 79.4 -31 1.94

  6. PCCAS Binder Study PG Delta Tcr Tcr Strain Grade Original Tcr+ 3 BBR DTT B –1 86 -23.8 -22.8 1.27 65.7-23.8 B – 2 74.5 -30.9 -32.8 2.55 63.4-30.9 B – 3 86.7 -29.7 -30.5 2.25 66.1-29.7

  7. Strain @ Failure for Tcr + 3°C 15 PG 64-22, Unmodified 14 B-2, 3% SBS PMA 13 12 PSR, 4% SBS PMA 11 10 Strain at Failure, % 9 8 7 T cr + 3°C 6 5 4 3 2 1 0 -40 -34 -28 -22 -16 -10 Temperature, °C

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