Relationship between processing parameters and aging with the rheological behaviour of SBS modified bitumen

KAYA ÖZDEMİR D., TOPAL A., McNally T.

CONSTRUCTION AND BUILDING MATERIALS, cilt.221, ss.345-350, 2019 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 221
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1016/j.conbuildmat.2019.06.081
  • Dergi Adı: CONSTRUCTION AND BUILDING MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.345-350
  • Anahtar Kelimeler: SBS modified bitumen, Rheology, Aging, Master curves, Black diagrams, Cole-Cole plots, STORAGE STABILITY, MODIFIED ASPHALT, MORPHOLOGY, BLENDS, EVA
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

The influence of shear rate and mixing time and, simulated long-term aging as a function of frequency and temperature on the rheological behaviour of SBS modified bitumen was evaluated from oscillatory rheology measurements. Complex shear modulus (G*) and phase angle (delta) values were measured and Master curves, Black diagrams and Cole-Cole plots constructed in an attempt to assess the effects of mixing conditions (i.e. short term aging) and long term aging on the theological characteristics of SBS modified bitumen. Rutting (G*/sin(delta)) parameters were calculated to obtain the performance grade (PG) temperatures of each modified bitumen. It was observed that higher shear rates and longer mixing times promote oxidative aging of the SBS modified samples relative to neat bitumen and have higher activation energies for flow and temperature susceptibility. Additionally, for the same shear rate and mixing time a similar level of compatibility between SBS and bitumen is obtained. (C) 2019 Elsevier Ltd. All rights reserved.