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Open AccessArticle

Improving Asphalt Mixture Performance by Partially Replacing Bitumen with Waste Motor Oil and Elastomer Modifiers

1
CTAC, Centre for Territory, Environment and Construction, University of Minho, 4800 058 Guimarães, Portugal
2
Wacker Chemical Corporation, 6870 Tilghman Street, Allentown, PA 18106-9346, USA
3
Department of Civil, Construction and Environmental Engineering, Iowa State University, Ames, IA 50011-3232, USA
*
Author to whom correspondence should be addressed.
Appl. Sci. 2017, 7(8), 794; https://doi.org/10.3390/app7080794
Received: 21 July 2017 / Revised: 1 August 2017 / Accepted: 2 August 2017 / Published: 5 August 2017
(This article belongs to the Special Issue Advanced Asphalt Materials and Paving Technologies)
The environmental concern about waste generation and the gradual decrease of oil reserves has led the way to finding new waste materials that may partially replace the bitumens used in the road paving industry. Used motor oil from vehicles is a waste product that could answer that demand, but it can also drastically reduce the viscosity, increasing the asphalt mixture’s rutting potential. Therefore, polymer modification should be used in order to avoid compromising the required performance of asphalt mixtures when higher amounts of waste motor oil are used. Thus, this study was aimed at assessing the performance of an asphalt binder/mixture obtained by replacing part of a paving grade bitumen (35/50) with 10% waste motor oil and 5% styrene-butadiene-styrene (SBS) as an elastomer modifier. A comparison was also made with the results of a previous study using a blend of bio-oil from fast pyrolysis and ground tire rubber modifier as a partial substitute for usual PG64-22 bitumen. The asphalt binders were tested by means of Fourier infrared spectra and dynamic shear rheology, namely by assessing their continuous high-performance grade. Later, the water sensitivity, fatigue cracking resistance, dynamic modulus and rut resistance performance of the resulting asphalt mixtures was evaluated. It was concluded that the new binder studied in this work improves the asphalt mixture’s performance, making it an excellent solution for paving works. View Full-Text
Keywords: waste motor oil; styrene-butadiene-styrene; bitumen modification; bio-binder; asphalt mixtures; performance waste motor oil; styrene-butadiene-styrene; bitumen modification; bio-binder; asphalt mixtures; performance
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MDPI and ACS Style

Fernandes, S.; Peralta, J.; Oliveira, J.R.M.; Williams, R.C.; Silva, H.M.R.D. Improving Asphalt Mixture Performance by Partially Replacing Bitumen with Waste Motor Oil and Elastomer Modifiers. Appl. Sci. 2017, 7, 794.

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