Excellent Roadway Performance & Durability

Roadway Durability Profile: Fracture Toughness  After Aging

  • An Ideal Rejuvenator improves fracture toughness in mixes
    • Aging performance with RAP is similar to No-RAP mixes
    • ReLIXER can help maintain aging performance unlike Petrochemical Rejuvenators
  • 30-50% RAP mixes give equivalent performance to No-RAP mixes, at a lower cost too

Aging Behavior of Bitumen with ReLIXER® & “Soft” Bitumen

​​“Softer” Grade bitumen are used to rejuvenate RAP mixes. However, the methods used to achieve a “Softer” bitumen can significantly impact the resultant properties.

PAV aged Base Bitumen, Base Bitumen + ReLIXER and a “Softer” Bitumen were tested using Bending Beam Rheometry (BBR).  The rejuvenated sample closely maintains the DTc of the Base Bitumen, while the “Softer” Grade Bitumen has an unacceptably highΔTc.

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Fracture Toughness of Roadway with High RAP + ReLIXER

Fracture toughness of high-RAP Mixes dosed with 4 % ReLIXER, 45 % binder replacement for medium traffic roadways were evaluated. 

Two aging regimes were evaluated – a short term oven aging of 4-hours and a 12-hour loose mix oven aging at 135 °C. The Mix dosed with ReLIXER showed outstanding fracture toughness properties for both aging regimes. 

For a comparison, a mix was also made with a “Softer” Grade Binder and evaluated for I-FIT and DCT results, which were inferior to the rejuvenated mixes.

High-RAP Mixes with ReLIXER®: Comparable Crack Resistance

GLOVER-ROWE TEST

  • Lab: EMPA Test Results: 5211.0193.100.01
  • Mix Type: AC B11 S Type
    High Traffic, Moderate Climate
  • Virgin Binder: 70/100
  • Total Binder: 5.06 %
  • ReLIXER: 7.5 % of RAP Bitumen
  • Aging: 2X PAV
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Deeper Insight