Fatigue Analysis of Bitumen Modified with Composite of Nano-SiO2 and Styrene Butadiene Styrene Polymer

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Published Jul 19, 2020
DOI https://doi.org/10.3221/IGF-ESIS.53.17

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Sajad Rezaei
Pooyesh Institute of Higher Education, Iran
https://orcid.org/0000-0001-7394-8001 Seyed Mohsen Damadi
Payame Noor University, Iran
Ali Edrisi
KN Toosi University of technology, Iran
Mansour Fakhri
KN Toosi University of technology, Iran
Mohammad Worya Khordehbinan
Pooyesh Institute of Higher Education, Iran

Abstract

Since fatigue cracking is caused in the middle-temperature conditions due to the stresses from heavy traffic and as the bitumen plays a very important role in controlling this failure, therefore, in recent years, the production of the modified bitumen that can give a good performance in the middle temperatures has always attracted the interest of researchers. One of these bitumen modifiers is the styrene butadiene styrene (SBS) polymer. Due to the phase separation of bitumen and polymer, aging and oxidation, this polymer may not exhibit expected field performance at middle temperatures. Therefore, in this research, it is attempted to analyze the middle-temperature performance using the combination of nano-SiO2 and SBS polymer in the bitumen modification. In this paper, the addition of SBS and nano-SiO2 to the base bitumen resulted in the reduction of the complex modulus, phase angle, storage modulus and loss modulus at middle temperatures, thereby improving the potential of fatigue failure resistance. In general, considering the requirement for the rotational viscosity value up to 3 Pa.s at 135 °C and also, regarding the economic issues in choosing a lower percentage, the combination of 4.5% SBS + 3% nano-SiO2 is selected as the optimal composite.

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    Issue
    Vol. 14 No. 53 (2020): July 2020
    Section
    Fatigue

    How to Cite

    Rezaei, S. (2020) “Fatigue Analysis of Bitumen Modified with Composite of Nano-SiO2 and Styrene Butadiene Styrene Polymer”, Frattura ed Integrità Strutturale, 14(53), pp. 202–209. doi: 10.3221/IGF-ESIS.53.17.
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