Creep compliance of asphalt binders by indentation

Abstract A solution for measuring creep compliance of asphalt binders is obtained by testing samples using a spherical indenter at intermediate temperatures. The initial assumptions considered a semi-infinite medium with no friction. Solutions were obtained to correct for the finite height and radiu...

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Autores principales:	Delgadillo,Rodrigo, Filonzi,Angelo, Bahia,Hussain, Roohi Sefidmazgi,Nima
Lenguaje:	English
Publicado:	Escuela de Construcción Civil, Pontificia Universidad Católica de Chile 2018
Materias:	Spherical indenter indentation test asphalt binder viscoelasticity creep compliance rheology.
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-915X2018000100085
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spelling	oai:scielo:S0718-915X20180001000852018-08-22Creep compliance of asphalt binders by indentationDelgadillo,RodrigoFilonzi,AngeloBahia,HussainRoohi Sefidmazgi,Nima Spherical indenter indentation test asphalt binder viscoelasticity creep compliance rheology. Abstract A solution for measuring creep compliance of asphalt binders is obtained by testing samples using a spherical indenter at intermediate temperatures. The initial assumptions considered a semi-infinite medium with no friction. Solutions were obtained to correct for the finite height and radius of the samples. Three non-modified asphalt binders were tested at intermediate temperatures (20 - 25 °C) using three load levels (25 - 50 - 75 g). Three sample radius (25 - 35 - 50 mm) and three sample heights (15 - 30 - 50 mm) were considered, thus obtaining a total of nine sample sizes. The binders were also tested in creep using a dynamic shear rheometer and results were compared with indentation. For the three asphalt binders analyzed, creep compliances obtained by indentation turned to be lower than the values measured using dynamic shear rheometers. One probable reason for this difference is the excessive aging that is induced on the surface of samples to be indented during sample preparation, as well as the effects of friction and indentation depth during testing. Future studies should consider the effect of friction in the indentation, which seem not to be totally negligible.info:eu-repo/semantics/openAccessEscuela de Construcción Civil, Pontificia Universidad Católica de ChileRevista de la construcción v.17 n.1 20182018-04-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-915X2018000100085en10.7764/rdlc.17.1.85
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Spherical indenter indentation test asphalt binder viscoelasticity creep compliance rheology.
spellingShingle	Spherical indenter indentation test asphalt binder viscoelasticity creep compliance rheology. Delgadillo,Rodrigo Filonzi,Angelo Bahia,Hussain Roohi Sefidmazgi,Nima Creep compliance of asphalt binders by indentation
description	Abstract A solution for measuring creep compliance of asphalt binders is obtained by testing samples using a spherical indenter at intermediate temperatures. The initial assumptions considered a semi-infinite medium with no friction. Solutions were obtained to correct for the finite height and radius of the samples. Three non-modified asphalt binders were tested at intermediate temperatures (20 - 25 °C) using three load levels (25 - 50 - 75 g). Three sample radius (25 - 35 - 50 mm) and three sample heights (15 - 30 - 50 mm) were considered, thus obtaining a total of nine sample sizes. The binders were also tested in creep using a dynamic shear rheometer and results were compared with indentation. For the three asphalt binders analyzed, creep compliances obtained by indentation turned to be lower than the values measured using dynamic shear rheometers. One probable reason for this difference is the excessive aging that is induced on the surface of samples to be indented during sample preparation, as well as the effects of friction and indentation depth during testing. Future studies should consider the effect of friction in the indentation, which seem not to be totally negligible.
author	Delgadillo,Rodrigo Filonzi,Angelo Bahia,Hussain Roohi Sefidmazgi,Nima
author_facet	Delgadillo,Rodrigo Filonzi,Angelo Bahia,Hussain Roohi Sefidmazgi,Nima
author_sort	Delgadillo,Rodrigo
title	Creep compliance of asphalt binders by indentation
title_short	Creep compliance of asphalt binders by indentation
title_full	Creep compliance of asphalt binders by indentation
title_fullStr	Creep compliance of asphalt binders by indentation
title_full_unstemmed	Creep compliance of asphalt binders by indentation
title_sort	creep compliance of asphalt binders by indentation
publisher	Escuela de Construcción Civil, Pontificia Universidad Católica de Chile
publishDate	2018
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-915X2018000100085
work_keys_str_mv	AT delgadillorodrigo creepcomplianceofasphaltbindersbyindentation AT filonziangelo creepcomplianceofasphaltbindersbyindentation AT bahiahussain creepcomplianceofasphaltbindersbyindentation AT roohisefidmazginima creepcomplianceofasphaltbindersbyindentation
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Creep compliance of asphalt binders by indentation

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