Moisture Susceptibility of Nano-Al2O3 and SiO2 Modified Asphalt Mixtures

KARAHANÇER Ş., ERİŞKİN E., SALTAN M., TERZİ S., Akbas M., Cengizhan A.

International Airfield and Highway Pavements Conference 2019: Testing and Characterization of Pavement Materials, Illinois, United States Of America, 21 - 24 July 2019, pp.127-135, (Full Text) identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.1061/9780784482469.013
  • City: Illinois
  • Country: United States Of America
  • Page Numbers: pp.127-135
  • Keywords: aluminum oxide, moisture susceptibility, nano-modified asphalt, Silica
  • Isparta University of Applied Sciences Affiliated: Yes

Abstract

The aim of the study is to evaluate the performance of hot mix asphalt (HMA) against moisture with nano-materials according to Superpave mix design procedure. In this study, bitumen is modified by silica nano-powder (SiO2NP) and aluminum oxide (Al2O3) nano-particle. Nano-materials are mixed with base bitumen at contents of 0.3% and 3% by nano-silica and aluminum oxide and 0.5 and 5% nano-silica and aluminum oxide by weight of bitumen, respectively. HMA is prepared with nano-modified bitumen at optimum binder contents (OBC). Moisture susceptibility of modified HMA is evaluated according to modified Lottman test procedure. OBCs are increased by modification. HMA samples modified by 0.3% SiO2 and 3% Al2O3 is determined as high resistive to moisture compared to other mixtures.