Rheological Quantification of Bitumen Aging: Definition of a New Sensitive Parameter
Bitumen is undoubtedly the most important material in the construction and rehabilitation of flexible road pavements. By increasing the temperature, bitumen changes from brittle solid, to viscoelastic solid and finally to Newtonian fluid. The rheological characteristics of bitumen also vary greatly...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2010-12-01
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| Series: | Applied Rheology |
| Subjects: | |
| Online Access: | https://doi.org/10.3933/applrheol-20-63293 |
| _version_ | 1818595083542331392 |
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| author | Peralta Joana Hilliou Loic Silva Hugo M.R.D. Machado Ana V. Pais Jorge C. Oliveira Joel R.M. |
| author_facet | Peralta Joana Hilliou Loic Silva Hugo M.R.D. Machado Ana V. Pais Jorge C. Oliveira Joel R.M. |
| author_sort | Peralta Joana |
| collection | DOAJ |
| description | Bitumen is undoubtedly the most important material in the construction and rehabilitation of flexible road pavements. By increasing the temperature, bitumen changes from brittle solid, to viscoelastic solid and finally to Newtonian fluid. The rheological characteristics of bitumen also vary greatly due to aging, which is a phenomenon initiated in the phases of production and application of bituminous (asphalt) mixtures and continued during the life of road pavements. The aim of this work is to study several rheological parameters in order to evaluate if they are able to quantify the aging of various types of bitumens. Four bitumens from the same distillation column in the refinery, but with different penetration grades, were aged by using the RTFOT method, which simulates the aging of the bitumen during the asphalt mixture production and pavement construction. The original (base) and aged bitumens were characterized with conventional tests used in the paving industry, and the results were compared with the rheological characteristics obtained with small amplitude oscillatory shear tests. Aging was assessed at high temperatures (110 to 180°C) through the activation energy computed from the temperature dependence of the Newtonian viscosity. However, the comparison of the characteristic relaxation times extracted from master curves measured at medium/low temperatures (between 25 to 80ºC), proved to be the most sensitive indicator of bitumen aging. |
| first_indexed | 2024-12-16T11:10:23Z |
| format | Article |
| id | doaj.art-0a5993cc33154d4db216c66cf4de3445 |
| institution | Directory Open Access Journal |
| issn | 1617-8106 |
| language | English |
| last_indexed | 2024-12-16T11:10:23Z |
| publishDate | 2010-12-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Applied Rheology |
| spelling | doaj.art-0a5993cc33154d4db216c66cf4de34452022-12-21T22:33:44ZengDe GruyterApplied Rheology1617-81062010-12-0120610.3933/applrheol-20-63293Rheological Quantification of Bitumen Aging: Definition of a New Sensitive ParameterPeralta Joana0Hilliou Loic1Silva Hugo M.R.D.2Machado Ana V.3Pais Jorge C.4Oliveira Joel R.M.5C-TAC - Territory, Environment and Construction Centre, Department of Civil Engineering, University of Minho, Campus de Azurém, 4800-058Guimarães, PortugalInstitute for Polymers and Composites/I3N, University of Minho, Campus de Azurém 4800-058Guimarães, PortugalC-TAC - Territory, Environment and Construction Centre, Department of Civil Engineering, University of Minho, Campus de Azurém, 4800-058Guimarães, PortugalInstitute for Polymers and Composites/I3N, University of Minho, Campus de Azurém 4800-058Guimarães, PortugalC-TAC - Territory, Environment and Construction Centre, Department of Civil Engineering, University of Minho, Campus de Azurém, 4800-058Guimarães, PortugalC-TAC - Territory, Environment and Construction Centre, Department of Civil Engineering, University of Minho, Campus de Azurém, 4800-058Guimarães, PortugalBitumen is undoubtedly the most important material in the construction and rehabilitation of flexible road pavements. By increasing the temperature, bitumen changes from brittle solid, to viscoelastic solid and finally to Newtonian fluid. The rheological characteristics of bitumen also vary greatly due to aging, which is a phenomenon initiated in the phases of production and application of bituminous (asphalt) mixtures and continued during the life of road pavements. The aim of this work is to study several rheological parameters in order to evaluate if they are able to quantify the aging of various types of bitumens. Four bitumens from the same distillation column in the refinery, but with different penetration grades, were aged by using the RTFOT method, which simulates the aging of the bitumen during the asphalt mixture production and pavement construction. The original (base) and aged bitumens were characterized with conventional tests used in the paving industry, and the results were compared with the rheological characteristics obtained with small amplitude oscillatory shear tests. Aging was assessed at high temperatures (110 to 180°C) through the activation energy computed from the temperature dependence of the Newtonian viscosity. However, the comparison of the characteristic relaxation times extracted from master curves measured at medium/low temperatures (between 25 to 80ºC), proved to be the most sensitive indicator of bitumen aging.https://doi.org/10.3933/applrheol-20-63293bitumenagingactivation energymaster curverelaxation timepaving industry |
| spellingShingle | Peralta Joana Hilliou Loic Silva Hugo M.R.D. Machado Ana V. Pais Jorge C. Oliveira Joel R.M. Rheological Quantification of Bitumen Aging: Definition of a New Sensitive Parameter Applied Rheology bitumen aging activation energy master curve relaxation time paving industry |
| title | Rheological Quantification of Bitumen Aging: Definition of a New Sensitive Parameter |
| title_full | Rheological Quantification of Bitumen Aging: Definition of a New Sensitive Parameter |
| title_fullStr | Rheological Quantification of Bitumen Aging: Definition of a New Sensitive Parameter |
| title_full_unstemmed | Rheological Quantification of Bitumen Aging: Definition of a New Sensitive Parameter |
| title_short | Rheological Quantification of Bitumen Aging: Definition of a New Sensitive Parameter |
| title_sort | rheological quantification of bitumen aging definition of a new sensitive parameter |
| topic | bitumen aging activation energy master curve relaxation time paving industry |
| url | https://doi.org/10.3933/applrheol-20-63293 |
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