Waste Rubber from End-of-Life Tires in ‘Lean’ Asphalt Mixtures—A Laboratory and Field Investigation in the Arid Climate Region

Waste rubber from end-of-life tires has been proved to be an excellent source of polymeric material for paving applications. Over the years, however, the rubberized asphalt technology has never been used in ‘lean’ (low bitumen content) asphalt mixtures typically used in arid regions. This study offe...

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Autores principales:	Stefano Marini, Michele Lanotte
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	rubberized asphalt lean mixtures permanent deformation cracking performance IRI friction Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/dd08e9db46be4e76a4137475f8caa47f
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spelling	oai:doaj.org-article:dd08e9db46be4e76a4137475f8caa47f2021-11-11T18:47:51ZWaste Rubber from End-of-Life Tires in ‘Lean’ Asphalt Mixtures—A Laboratory and Field Investigation in the Arid Climate Region10.3390/polym132138022073-4360https://doaj.org/article/dd08e9db46be4e76a4137475f8caa47f2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4360/13/21/3802https://doaj.org/toc/2073-4360Waste rubber from end-of-life tires has been proved to be an excellent source of polymeric material for paving applications. Over the years, however, the rubberized asphalt technology has never been used in ‘lean’ (low bitumen content) asphalt mixtures typically used in arid regions. This study offers an insight on the potential benefits and drawbacks resulting from this technology if applied in such ‘lean’ mixes. Results show that the ‘lean’ nature of those asphalt mixes eliminates the potential benefits given by the modified bitumen for rutting performance. Instead, the aggregates gradation plays a major role in the response of the materials, with gap-graded mixtures often outperforming those with a dense-graded gradation. On the contrary, fatigue cracking resistance is affected by the bitumen properties, and rubberized asphalt perform better than others. The performance-based analysis suggests that the current specifications tend to overachieve the goal of reducing permanent deformation while cracking becomes a major concern which can be solved by using rubberized asphalt. In the field, gap-graded asphalt with rubberized bitumen showed the best response in terms of skid resistance and noise reduction.Stefano MariniMichele LanotteMDPI AGarticlerubberized asphaltlean mixturespermanent deformationcracking performanceIRIfrictionOrganic chemistryQD241-441ENPolymers, Vol 13, Iss 3802, p 3802 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	rubberized asphalt lean mixtures permanent deformation cracking performance IRI friction Organic chemistry QD241-441
spellingShingle	rubberized asphalt lean mixtures permanent deformation cracking performance IRI friction Organic chemistry QD241-441 Stefano Marini Michele Lanotte Waste Rubber from End-of-Life Tires in ‘Lean’ Asphalt Mixtures—A Laboratory and Field Investigation in the Arid Climate Region
description	Waste rubber from end-of-life tires has been proved to be an excellent source of polymeric material for paving applications. Over the years, however, the rubberized asphalt technology has never been used in ‘lean’ (low bitumen content) asphalt mixtures typically used in arid regions. This study offers an insight on the potential benefits and drawbacks resulting from this technology if applied in such ‘lean’ mixes. Results show that the ‘lean’ nature of those asphalt mixes eliminates the potential benefits given by the modified bitumen for rutting performance. Instead, the aggregates gradation plays a major role in the response of the materials, with gap-graded mixtures often outperforming those with a dense-graded gradation. On the contrary, fatigue cracking resistance is affected by the bitumen properties, and rubberized asphalt perform better than others. The performance-based analysis suggests that the current specifications tend to overachieve the goal of reducing permanent deformation while cracking becomes a major concern which can be solved by using rubberized asphalt. In the field, gap-graded asphalt with rubberized bitumen showed the best response in terms of skid resistance and noise reduction.
format	article
author	Stefano Marini Michele Lanotte
author_facet	Stefano Marini Michele Lanotte
author_sort	Stefano Marini
title	Waste Rubber from End-of-Life Tires in ‘Lean’ Asphalt Mixtures—A Laboratory and Field Investigation in the Arid Climate Region
title_short	Waste Rubber from End-of-Life Tires in ‘Lean’ Asphalt Mixtures—A Laboratory and Field Investigation in the Arid Climate Region
title_full	Waste Rubber from End-of-Life Tires in ‘Lean’ Asphalt Mixtures—A Laboratory and Field Investigation in the Arid Climate Region
title_fullStr	Waste Rubber from End-of-Life Tires in ‘Lean’ Asphalt Mixtures—A Laboratory and Field Investigation in the Arid Climate Region
title_full_unstemmed	Waste Rubber from End-of-Life Tires in ‘Lean’ Asphalt Mixtures—A Laboratory and Field Investigation in the Arid Climate Region
title_sort	waste rubber from end-of-life tires in ‘lean’ asphalt mixtures—a laboratory and field investigation in the arid climate region
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/dd08e9db46be4e76a4137475f8caa47f
work_keys_str_mv	AT stefanomarini wasterubberfromendoflifetiresinleanasphaltmixturesalaboratoryandfieldinvestigationinthearidclimateregion AT michelelanotte wasterubberfromendoflifetiresinleanasphaltmixturesalaboratoryandfieldinvestigationinthearidclimateregion
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Waste Rubber from End-of-Life Tires in ‘Lean’ Asphalt Mixtures—A Laboratory and Field Investigation in the Arid Climate Region

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