Characterization of effects of reclaimed asphalt pavement (RAP) source and content on dynamic modulus of hot mix asphalt concrete

Ali Jamshidi, Greg White, Mehdi Hosseinpour, Kiyofumi Kurumisawa, Meor Othman Hamzah

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The effects of the reclaimed asphalt pavement (RAP) source and content on the dynamic modulus (E *) of hot mix asphalt concrete were characterized. Two parameters were proposed: the non-dimensional dynamic modulus-temperature index (∇E T *) and non-dimensional dynamic modulus-frequency index (∇E fr *). Parameter ∇E fr * indicates the increase of relative E * per unit percent RAP from different sources during frequency and temperature sweeps, while ∇E T * characterizes the reduction of relative E * per 1 °C temperature increase. An analysis of the results showed that ∇E T * of RAP mixes were 6.80% to 12% higher than those of the control samples, indicating less temperature susceptibility. Furthermore, an analysis of ∇E fr * trends showed temperature independency at higher temperature ranges. In addition, the results showed that the activation energy (AE) of the mixes was 1.51 MJ/mol/K to 9.86 MJ/mol/K higher than that of the control samples (without RAP), which depends on the RAP content and source. Moreover, E * linearly increases as AE increases. In conclusion, the increase of intermolecular forces owing to the higher AE in the blended binders increased the mix stiffness, which resulted in a higher E * in mixes containing RAP.

Original languageEnglish
JournalConstruction and Building Materials
Volume217
Pages (from-to)487-497
ISSN0950-0618
DOIs
Publication statusPublished - 2019

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Asphalt concrete
Asphalt pavements
Activation energy
Temperature
Binders
Stiffness

Keywords

  • RAP source
  • Activation energy
  • Dynamic modulus
  • Phase angle

Cite this

@article{45b5a9dd68b849e894a3defa28bef4af,
title = "Characterization of effects of reclaimed asphalt pavement (RAP) source and content on dynamic modulus of hot mix asphalt concrete",
abstract = "The effects of the reclaimed asphalt pavement (RAP) source and content on the dynamic modulus (E *) of hot mix asphalt concrete were characterized. Two parameters were proposed: the non-dimensional dynamic modulus-temperature index (∇E T *) and non-dimensional dynamic modulus-frequency index (∇E fr *). Parameter ∇E fr * indicates the increase of relative E * per unit percent RAP from different sources during frequency and temperature sweeps, while ∇E T * characterizes the reduction of relative E * per 1 °C temperature increase. An analysis of the results showed that ∇E T * of RAP mixes were 6.80{\%} to 12{\%} higher than those of the control samples, indicating less temperature susceptibility. Furthermore, an analysis of ∇E fr * trends showed temperature independency at higher temperature ranges. In addition, the results showed that the activation energy (AE) of the mixes was 1.51 MJ/mol/K to 9.86 MJ/mol/K higher than that of the control samples (without RAP), which depends on the RAP content and source. Moreover, E * linearly increases as AE increases. In conclusion, the increase of intermolecular forces owing to the higher AE in the blended binders increased the mix stiffness, which resulted in a higher E * in mixes containing RAP.",
keywords = "RAP source, Activation energy, Dynamic modulus, Phase angle, RAP source, Activation energy, Dynamic modulus, Phase angle",
author = "Ali Jamshidi and Greg White and Mehdi Hosseinpour and Kiyofumi Kurumisawa and Hamzah, {Meor Othman}",
year = "2019",
doi = "10.1016/j.conbuildmat.2019.05.059",
language = "English",
volume = "217",
pages = "487--497",
journal = "Construction and Building Materials",
issn = "0950-0618",
publisher = "Elsevier",

}

Characterization of effects of reclaimed asphalt pavement (RAP) source and content on dynamic modulus of hot mix asphalt concrete. / Jamshidi, Ali; White, Greg; Hosseinpour, Mehdi; Kurumisawa, Kiyofumi; Hamzah, Meor Othman.

In: Construction and Building Materials, Vol. 217, 2019, p. 487-497.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Characterization of effects of reclaimed asphalt pavement (RAP) source and content on dynamic modulus of hot mix asphalt concrete

AU - Jamshidi, Ali

AU - White, Greg

AU - Hosseinpour, Mehdi

AU - Kurumisawa, Kiyofumi

AU - Hamzah, Meor Othman

PY - 2019

Y1 - 2019

N2 - The effects of the reclaimed asphalt pavement (RAP) source and content on the dynamic modulus (E *) of hot mix asphalt concrete were characterized. Two parameters were proposed: the non-dimensional dynamic modulus-temperature index (∇E T *) and non-dimensional dynamic modulus-frequency index (∇E fr *). Parameter ∇E fr * indicates the increase of relative E * per unit percent RAP from different sources during frequency and temperature sweeps, while ∇E T * characterizes the reduction of relative E * per 1 °C temperature increase. An analysis of the results showed that ∇E T * of RAP mixes were 6.80% to 12% higher than those of the control samples, indicating less temperature susceptibility. Furthermore, an analysis of ∇E fr * trends showed temperature independency at higher temperature ranges. In addition, the results showed that the activation energy (AE) of the mixes was 1.51 MJ/mol/K to 9.86 MJ/mol/K higher than that of the control samples (without RAP), which depends on the RAP content and source. Moreover, E * linearly increases as AE increases. In conclusion, the increase of intermolecular forces owing to the higher AE in the blended binders increased the mix stiffness, which resulted in a higher E * in mixes containing RAP.

AB - The effects of the reclaimed asphalt pavement (RAP) source and content on the dynamic modulus (E *) of hot mix asphalt concrete were characterized. Two parameters were proposed: the non-dimensional dynamic modulus-temperature index (∇E T *) and non-dimensional dynamic modulus-frequency index (∇E fr *). Parameter ∇E fr * indicates the increase of relative E * per unit percent RAP from different sources during frequency and temperature sweeps, while ∇E T * characterizes the reduction of relative E * per 1 °C temperature increase. An analysis of the results showed that ∇E T * of RAP mixes were 6.80% to 12% higher than those of the control samples, indicating less temperature susceptibility. Furthermore, an analysis of ∇E fr * trends showed temperature independency at higher temperature ranges. In addition, the results showed that the activation energy (AE) of the mixes was 1.51 MJ/mol/K to 9.86 MJ/mol/K higher than that of the control samples (without RAP), which depends on the RAP content and source. Moreover, E * linearly increases as AE increases. In conclusion, the increase of intermolecular forces owing to the higher AE in the blended binders increased the mix stiffness, which resulted in a higher E * in mixes containing RAP.

KW - RAP source

KW - Activation energy

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KW - RAP source

KW - Activation energy

KW - Dynamic modulus

KW - Phase angle

U2 - 10.1016/j.conbuildmat.2019.05.059

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SN - 0950-0618

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