Physical and rheological properties of nano-TiO2 and nanocomposite modified bitumens
Küçük Resim Yok
Tarih
2020
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Sci Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Usage of nano-TiO2 and nano-TiO2/styrene-butadiene-styrene (SBS) nano-composite as a modifier in bitumen was studied. To this end, conventional test methods including softening point and penetration tests were applied to binders to examine the physical changes after nano-TiO2 modification. the rheological characterizations of base and nano modified binder were performed by means of constructing master curves of complex viscosity (eta*), storage (G') and loss modulus (G '') by time-temperature superposition principle. Short-term aging behavior of binders were investigated by means of roll thin film oven test (RTFOT). Dynamic shear rheometer (DSR) was employed to determinate high temperature performance grade (PG) of bitumens by using Superpave specification. Multiple stress creep recovery (MSCR) test, up-to-date method proposed for high temperature performance grades, was applied to short-term aged bitumen. the performance grades of base and nano modified bitumens determined by Superpave specification and MSCR method were also compared. the results suggest that addition of nano-TiO2 has a positive influence on stiffness of bitumen whereas the nanocomposite modifier formed by means of nano-TiO2 and SBS polymer could satisfactorily be employed as modifier in bitumen as better rheological parameters were obtained compared to pure SBS modification. (C) 2020 Elsevier Ltd. All rights reserved.
Açıklama
Anahtar Kelimeler
Bitumen, Rheology, Modification, Nano-TiO2, Nanomaterials
Kaynak
Construction and Building Materials
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
243
