Functional grading of viscoelastic defined hot mix asphalt layers

Abstract In the design of layered flexible pavements with the mechanistic-empirical (M-E) method, the material characterization of layers is critical for the correct calculation of mechanical responses. The surface layers of flexible pavements produced as hot mix asphalt (HMA) behave as a viscoelast...

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Autor principal:	Bostancioğlu,Murat
Lenguaje:	English
Publicado:	Escuela de Construcción Civil, Pontificia Universidad Católica de Chile 2020
Materias:	Hot mix asphalt mechanistic-empirical pavement design creep-compliance viscoelastic material functional grading fatigue
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-915X2020000300258
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spelling	oai:scielo:S0718-915X20200003002582021-02-16Functional grading of viscoelastic defined hot mix asphalt layersBostancioğlu,Murat Hot mix asphalt mechanistic-empirical pavement design creep-compliance viscoelastic material functional grading fatigue Abstract In the design of layered flexible pavements with the mechanistic-empirical (M-E) method, the material characterization of layers is critical for the correct calculation of mechanical responses. The surface layers of flexible pavements produced as hot mix asphalt (HMA) behave as a viscoelastic material under real field conditions. In this study, in which the HMA surface layer was defined viscoelastic by creep-compliance method, functional grading was applied to the surface layer at the same time to increase the fatigue strength of the pavement. Functional grading application was performed in the form of 3, 5, 7, and 9 sub-layers with linear and exponential functions. The pavement life values due to the mechanical responses that occurred in the pavement were determined by the Asphalt Institute and Shell methods. The study results show that the fatigue strength of the viscoelastic surface layer increases significantly as a result of functional grading. Especially in sections with exponential grading, an improvement of more than 10% was achieved even when a small number of sub-layers used. These results show that functional grading can also be successfully applied in field studies, and even with three sub-layers, significant improvements can be provided.info:eu-repo/semantics/openAccessEscuela de Construcción Civil, Pontificia Universidad Católica de ChileRevista de la construcción v.19 n.3 20202020-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-915X2020000300258en10.7764/rdlc.19.3.258
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Hot mix asphalt mechanistic-empirical pavement design creep-compliance viscoelastic material functional grading fatigue
spellingShingle	Hot mix asphalt mechanistic-empirical pavement design creep-compliance viscoelastic material functional grading fatigue Bostancioğlu,Murat Functional grading of viscoelastic defined hot mix asphalt layers
description	Abstract In the design of layered flexible pavements with the mechanistic-empirical (M-E) method, the material characterization of layers is critical for the correct calculation of mechanical responses. The surface layers of flexible pavements produced as hot mix asphalt (HMA) behave as a viscoelastic material under real field conditions. In this study, in which the HMA surface layer was defined viscoelastic by creep-compliance method, functional grading was applied to the surface layer at the same time to increase the fatigue strength of the pavement. Functional grading application was performed in the form of 3, 5, 7, and 9 sub-layers with linear and exponential functions. The pavement life values due to the mechanical responses that occurred in the pavement were determined by the Asphalt Institute and Shell methods. The study results show that the fatigue strength of the viscoelastic surface layer increases significantly as a result of functional grading. Especially in sections with exponential grading, an improvement of more than 10% was achieved even when a small number of sub-layers used. These results show that functional grading can also be successfully applied in field studies, and even with three sub-layers, significant improvements can be provided.
author	Bostancioğlu,Murat
author_facet	Bostancioğlu,Murat
author_sort	Bostancioğlu,Murat
title	Functional grading of viscoelastic defined hot mix asphalt layers
title_short	Functional grading of viscoelastic defined hot mix asphalt layers
title_full	Functional grading of viscoelastic defined hot mix asphalt layers
title_fullStr	Functional grading of viscoelastic defined hot mix asphalt layers
title_full_unstemmed	Functional grading of viscoelastic defined hot mix asphalt layers
title_sort	functional grading of viscoelastic defined hot mix asphalt layers
publisher	Escuela de Construcción Civil, Pontificia Universidad Católica de Chile
publishDate	2020
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-915X2020000300258
work_keys_str_mv	AT bostancio287lumurat functionalgradingofviscoelasticdefinedhotmixasphaltlayers
_version_	1714206309660753920

Functional grading of viscoelastic defined hot mix asphalt layers

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