Micromechanical shear modulus modeling of activated crumb rubber modified asphalt cements

Jose R. Medina; B. Shane Underwood

doi:10.1016/j.conbuildmat.2017.05.208

Micromechanical shear modulus modeling of activated crumb rubber modified asphalt cements

Jose R. Medina, B. Shane Underwood

Sustainable Engineering and the Built Environment, School of (IAFSE-SEBE)

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

The rheological properties of three asphalt cements containing reacted and activated rubber (RAR) are evaluated to quantify the relative effects of swelling, splitting, and absorption. Rheological testing and electron microscopy are used to measure the dynamic shear modulus, |G^∗|, and rubber particle changes respectively. It is found that |G^∗| increased for all RAR and that particles swell 15.8–49.3% with those in softer asphalt showing the greatest swelling. Micromechanical models are used to predict |G^∗| of the materials. The Hashin and Christensen models are found to accurately predict the measured moduli after accounting for the swelling, splitting, and absorption.

Original language	English (US)
Pages (from-to)	56-65
Number of pages	10
Journal	Construction and Building Materials
Volume	150
DOIs	https://doi.org/10.1016/j.conbuildmat.2017.05.208
State	Published - Sep 30 2017

Keywords

Activated mineral binder stabilizer (AMBS)
Activated rubber
Composite models
Crumb rubber
Crumb rubber splitting
Micromechanical models
Modified binder
Rheology

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction
Materials Science(all)

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10.1016/j.conbuildmat.2017.05.208

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title = "Micromechanical shear modulus modeling of activated crumb rubber modified asphalt cements",

abstract = "The rheological properties of three asphalt cements containing reacted and activated rubber (RAR) are evaluated to quantify the relative effects of swelling, splitting, and absorption. Rheological testing and electron microscopy are used to measure the dynamic shear modulus, |G∗|, and rubber particle changes respectively. It is found that |G∗| increased for all RAR and that particles swell 15.8–49.3% with those in softer asphalt showing the greatest swelling. Micromechanical models are used to predict |G∗| of the materials. The Hashin and Christensen models are found to accurately predict the measured moduli after accounting for the swelling, splitting, and absorption.",

keywords = "Activated mineral binder stabilizer (AMBS), Activated rubber, Composite models, Crumb rubber, Crumb rubber splitting, Micromechanical models, Modified binder, Rheology",

author = "Medina, {Jose R.} and Underwood, {B. Shane}",

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doi = "10.1016/j.conbuildmat.2017.05.208",

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AU - Medina, Jose R.

AU - Underwood, B. Shane

PY - 2017/9/30

Y1 - 2017/9/30

N2 - The rheological properties of three asphalt cements containing reacted and activated rubber (RAR) are evaluated to quantify the relative effects of swelling, splitting, and absorption. Rheological testing and electron microscopy are used to measure the dynamic shear modulus, |G∗|, and rubber particle changes respectively. It is found that |G∗| increased for all RAR and that particles swell 15.8–49.3% with those in softer asphalt showing the greatest swelling. Micromechanical models are used to predict |G∗| of the materials. The Hashin and Christensen models are found to accurately predict the measured moduli after accounting for the swelling, splitting, and absorption.

AB - The rheological properties of three asphalt cements containing reacted and activated rubber (RAR) are evaluated to quantify the relative effects of swelling, splitting, and absorption. Rheological testing and electron microscopy are used to measure the dynamic shear modulus, |G∗|, and rubber particle changes respectively. It is found that |G∗| increased for all RAR and that particles swell 15.8–49.3% with those in softer asphalt showing the greatest swelling. Micromechanical models are used to predict |G∗| of the materials. The Hashin and Christensen models are found to accurately predict the measured moduli after accounting for the swelling, splitting, and absorption.

KW - Activated mineral binder stabilizer (AMBS)

KW - Activated rubber

KW - Composite models

KW - Crumb rubber

KW - Crumb rubber splitting

KW - Micromechanical models

KW - Modified binder

KW - Rheology

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JO - Construction and Building Materials

JF - Construction and Building Materials

ER -

Micromechanical shear modulus modeling of activated crumb rubber modified asphalt cements

Abstract

Keywords

ASJC Scopus subject areas

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