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Rheological Behaviour of a Bitumen Modified with Metal Oxides Obtained by Regeneration Processes

Author

Listed:
  • Tullio Giuffrè

    (Faculty of Engineering and Architecture, University of Enna Kore, Viale delle Olimpiadi, 94100 Enna, Italy)

  • Marco Morreale

    (Faculty of Engineering and Architecture, University of Enna Kore, Viale delle Olimpiadi, 94100 Enna, Italy)

  • Giovanni Tesoriere

    (Faculty of Engineering and Architecture, University of Enna Kore, Viale delle Olimpiadi, 94100 Enna, Italy)

  • Salvatore Trubia

    (Faculty of Engineering and Architecture, University of Enna Kore, Viale delle Olimpiadi, 94100 Enna, Italy)

Abstract

Nowadays, one important challenge is to demonstrate an innovative and integrated approach for the sustainable construction of roads considering the whole life cycle of the infrastructure. Road pavements with multiple asphalt layers generally undergo prolonged environmental exposure and the alternation between solar irradiation and low temperatures. As a result, relaxation or progressive removal of the material with a negative impact on the resistance to plastic deformation occur, also leading to the formation of slits and to dimensional variations, which are commonly defined as thermal cracking. This suggests the use of suitable bitumen modifiers. For these, important parameters are the optimal mixing time and mixing temperature, in order to reduce problems related to the stability of the bitumen. Therefore, the behaviour, upon changing the temperature, of bituminous mixtures containing (as fillers) a series of metal oxides coming, as secondary products, from spent acid solutions regeneration processes, was investigated. This is intended in order to recover and reuse those otherwise dangerous wastes coming from several industrial (especially, metallurgical) processes. The study was aimed at evaluating the properties of bituminous blends by performing rheological tests under dynamic shear regime. More specifically, five different bitumen matrices were prepared (70/100 bitumen and blends with metal oxides and/or SBS copolymer). Results showed that the addition of iron oxides leads to an increase of the softening point and the complex modulus. The increase is even more emphasized when SBS is added to the blend.

Suggested Citation

  • Tullio Giuffrè & Marco Morreale & Giovanni Tesoriere & Salvatore Trubia, 2018. "Rheological Behaviour of a Bitumen Modified with Metal Oxides Obtained by Regeneration Processes," Sustainability, MDPI, vol. 10(3), pages 1-11, February.
    • Handle: RePEc:gam:jsusta:v:10:y:2018:i:3:p:604-:d:133723
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    References listed on IDEAS

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    1. Laura Moretti & Vittorio Mandrone & Antonio D’Andrea & Silvia Caro, 2017. "Comparative “from Cradle to Gate” Life Cycle Assessments of Hot Mix Asphalt (HMA) Materials," Sustainability, MDPI, vol. 9(3), pages 1-16, March.
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