The Influence of the Affinity between Aggregate and Bitumen on the Mechanical Performance Properties of Asphalt Mixtures

Two of the main problems encountered in flexible pavements are the stripping of coarse aggregates and the formation of rut depth due to increases in the volume of road traffic and heavy vehicle loads, especially in areas where speeds are low. The existence of rut depth also affects the comfort and s...

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Autores principales:	Maria M. A. S. Maia, Marisa Dinis-Almeida, Fernando C. G. Martinho
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	adhesion promoter affinity aggregate–bitumen filler permanent deformation water sensitivity Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/f0acb79670954158bbdfb10cd9d6dd56
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spelling	oai:doaj.org-article:f0acb79670954158bbdfb10cd9d6dd562021-11-11T18:01:30ZThe Influence of the Affinity between Aggregate and Bitumen on the Mechanical Performance Properties of Asphalt Mixtures10.3390/ma142164521996-1944https://doaj.org/article/f0acb79670954158bbdfb10cd9d6dd562021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6452https://doaj.org/toc/1996-1944Two of the main problems encountered in flexible pavements are the stripping of coarse aggregates and the formation of rut depth due to increases in the volume of road traffic and heavy vehicle loads, especially in areas where speeds are low. The existence of rut depth also affects the comfort and safety of road users due to the water accumulation on the pavement surface and reducing tire/pavement friction, which can lead to hydroplaning phenomena. In this research, it was proven that the use of fillers of different origins influences the affinity between aggregates and the binder. The effect of an adhesion promoter in the mix design (such as the amine included in cellulosic fiber pellets) was also studied. Several tests were carried out to determine the binder/aggregate adhesiveness, water sensitivity and resistance to permanent deformation, to evaluate the performance of different blends. It was found that the addition of this additive increased 10% of the aggregate surfaces covered with bitumen when compared with the aggregates without this addition. As expected, the water sensitivity tests showed that the mixture with granitic filler had the lowest indirect tensile strength ratio (ITSR) value (70%), while the mixtures with limestone filler led to the highest percentages (ranging from 83 to 93%). As for the results of the wheel tracking tests (WTT), it was confirmed that the use of limestone filler translates into an improvement in the performance against the permanent deformation of the asphalt mixtures. The mixture with higher bitumen content and adhesion promoter revealed the best average results.Maria M. A. S. MaiaMarisa Dinis-AlmeidaFernando C. G. MartinhoMDPI AGarticleadhesion promoteraffinity aggregate–bitumenfillerpermanent deformationwater sensitivityTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6452, p 6452 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	adhesion promoter affinity aggregate–bitumen filler permanent deformation water sensitivity Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	adhesion promoter affinity aggregate–bitumen filler permanent deformation water sensitivity Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Maria M. A. S. Maia Marisa Dinis-Almeida Fernando C. G. Martinho The Influence of the Affinity between Aggregate and Bitumen on the Mechanical Performance Properties of Asphalt Mixtures
description	Two of the main problems encountered in flexible pavements are the stripping of coarse aggregates and the formation of rut depth due to increases in the volume of road traffic and heavy vehicle loads, especially in areas where speeds are low. The existence of rut depth also affects the comfort and safety of road users due to the water accumulation on the pavement surface and reducing tire/pavement friction, which can lead to hydroplaning phenomena. In this research, it was proven that the use of fillers of different origins influences the affinity between aggregates and the binder. The effect of an adhesion promoter in the mix design (such as the amine included in cellulosic fiber pellets) was also studied. Several tests were carried out to determine the binder/aggregate adhesiveness, water sensitivity and resistance to permanent deformation, to evaluate the performance of different blends. It was found that the addition of this additive increased 10% of the aggregate surfaces covered with bitumen when compared with the aggregates without this addition. As expected, the water sensitivity tests showed that the mixture with granitic filler had the lowest indirect tensile strength ratio (ITSR) value (70%), while the mixtures with limestone filler led to the highest percentages (ranging from 83 to 93%). As for the results of the wheel tracking tests (WTT), it was confirmed that the use of limestone filler translates into an improvement in the performance against the permanent deformation of the asphalt mixtures. The mixture with higher bitumen content and adhesion promoter revealed the best average results.
format	article
author	Maria M. A. S. Maia Marisa Dinis-Almeida Fernando C. G. Martinho
author_facet	Maria M. A. S. Maia Marisa Dinis-Almeida Fernando C. G. Martinho
author_sort	Maria M. A. S. Maia
title	The Influence of the Affinity between Aggregate and Bitumen on the Mechanical Performance Properties of Asphalt Mixtures
title_short	The Influence of the Affinity between Aggregate and Bitumen on the Mechanical Performance Properties of Asphalt Mixtures
title_full	The Influence of the Affinity between Aggregate and Bitumen on the Mechanical Performance Properties of Asphalt Mixtures
title_fullStr	The Influence of the Affinity between Aggregate and Bitumen on the Mechanical Performance Properties of Asphalt Mixtures
title_full_unstemmed	The Influence of the Affinity between Aggregate and Bitumen on the Mechanical Performance Properties of Asphalt Mixtures
title_sort	influence of the affinity between aggregate and bitumen on the mechanical performance properties of asphalt mixtures
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/f0acb79670954158bbdfb10cd9d6dd56
work_keys_str_mv	AT mariamasmaia theinfluenceoftheaffinitybetweenaggregateandbitumenonthemechanicalperformancepropertiesofasphaltmixtures AT marisadinisalmeida theinfluenceoftheaffinitybetweenaggregateandbitumenonthemechanicalperformancepropertiesofasphaltmixtures AT fernandocgmartinho theinfluenceoftheaffinitybetweenaggregateandbitumenonthemechanicalperformancepropertiesofasphaltmixtures AT mariamasmaia influenceoftheaffinitybetweenaggregateandbitumenonthemechanicalperformancepropertiesofasphaltmixtures AT marisadinisalmeida influenceoftheaffinitybetweenaggregateandbitumenonthemechanicalperformancepropertiesofasphaltmixtures AT fernandocgmartinho influenceoftheaffinitybetweenaggregateandbitumenonthemechanicalperformancepropertiesofasphaltmixtures
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The Influence of the Affinity between Aggregate and Bitumen on the Mechanical Performance Properties of Asphalt Mixtures

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