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The new environmental targets set to save natural resources and recover waste materials have been the basis for several scientific studies in different research areas. Consequently, this work aims at developing recycled stone mastic asphalt mixtures with high rates of waste materials, including reclaimed asphalt pavements, waste engine oil products, waste polyethylene and crumb rubber. This new solution was compared with a conventional stone mastic asphalt mixture. Several blends of high penetration bitumens modified with waste materials and reclaimed aged bitumen were evaluated through basic and advanced tests, and the most promising solutions were selected to produce recycled stone mastic asphalt mixtures for further characterization. The water sensitivity, permanent deformation and fatigue cracking performance of those mixtures incorporating high rates of different waste materials were generally improved. The exceptional behaviour of these recycled mixtures together with the high incorporation rate of waste materials demonstrate the innovative character of these solutions for the road paving industry.
Sara R.M. Fernandes; Hugo M.R.D. Silva; Joel R.M. Oliveira. Recycled stone mastic asphalt mixtures incorporating high rates of waste materials. Construction and Building Materials 2018, 187, 1 -13.
AMA StyleSara R.M. Fernandes, Hugo M.R.D. Silva, Joel R.M. Oliveira. Recycled stone mastic asphalt mixtures incorporating high rates of waste materials. Construction and Building Materials. 2018; 187 ():1-13.
Chicago/Turabian StyleSara R.M. Fernandes; Hugo M.R.D. Silva; Joel R.M. Oliveira. 2018. "Recycled stone mastic asphalt mixtures incorporating high rates of waste materials." Construction and Building Materials 187, no. : 1-13.
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.
Sara Fernandes; Joana Peralta; Joel R. M. Oliveira; R. Christopher Williams; Hugo M. R. D. Silva. Improving Asphalt Mixture Performance by Partially Replacing Bitumen with Waste Motor Oil and Elastomer Modifiers. Applied Sciences 2017, 7, 794 .
AMA StyleSara Fernandes, Joana Peralta, Joel R. M. Oliveira, R. Christopher Williams, Hugo M. R. D. Silva. Improving Asphalt Mixture Performance by Partially Replacing Bitumen with Waste Motor Oil and Elastomer Modifiers. Applied Sciences. 2017; 7 (8):794.
Chicago/Turabian StyleSara Fernandes; Joana Peralta; Joel R. M. Oliveira; R. Christopher Williams; Hugo M. R. D. Silva. 2017. "Improving Asphalt Mixture Performance by Partially Replacing Bitumen with Waste Motor Oil and Elastomer Modifiers." Applied Sciences 7, no. 8: 794.