Rheological effects of commercial waxes and polyphosphoric acid in bitumen 160/220 - low temperature performance

Edwards Y., Tasdemir Y., Isacsson U.

FUEL, cilt.85, ss.989-997, 2006 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 85
  • Basım Tarihi: 2006
  • Doi Numarası: 10.1016/j.fuel.2005.09.014
  • Dergi Adı: FUEL
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.989-997
  • Anahtar Kelimeler: bitumen rheology, wax, polyphosphoric acid, COMPONENTS
  • Yozgat Bozok Üniversitesi Adresli: Evet

Özet

Effects of adding three commercial waxes and a polyphosphoric acid to three bitumens of 160/220 penetration grade were studied using different types of laboratory equipment, such as dynamic shear rheometer (DSR), bending beam rheometer (BBR), differential scanning calorimeter (DSC), force ductilometer (FD) as well as equipment for determining conventional parameters like penetration, softening point and Fraass breaking point. The paper deals with low-temperature effects, which could influence the thermal cracking resistance of asphalt concrete pavements. The results show that magnitude and type of effect on bitumen rheology depend on the bitumen itself as well as type and amount of additive used. Bitumen composition was found to be of decisive importance. Adding polyethylene wax or polyphosphoric acid, especially to nonwaxy 160/220-penetration grade bitumen, showed positive effects on the rheological behaviour at low temperatures. (c) 2005 Elsevier Ltd. All rights reserved.