Surface free energy and moisture susceptibility evaluation of asphalt binders modified with surfactant-based chemical additive

Muhammad Rafiq Kakar, Meor Othman Hamzah, Mohammad Nishat Akhtar, David Woodward

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Warm mix additives are used to lower the production and application temperature of asphalt mixtures.Moisture damage is one of the main reported issues with warm mix asphalt due to its lower productiontemperature and the possible presence of moisture being trapped during the mixing process. This paper considers the use surface free energy evaluation as a fundamental material property to assess mixture performance. Cecabase® chemical surfactant additive was used to prepare warm mix asphalt binders. Contact angle measurements were determined with a Goniometer to evaluate surface free energy measures such as work of adhesion, work of debonding and compatibility ratio. The results show that the use of the surfactant-based additive reduces surface free energy. It increases after short-term (Rolling Thin Film Oven) and reduces after long-term (Pressure Aging Vessel) aging. The analytical measurements based on surface free energy results illustrate that the surfactant-based warm mix additive improves the spreadibility of asphalt binder over the aggregate particles. The work of adhesion slightly improves with the addition of Cecabase® content. Compatibility ratio is an indicator of moisture susceptibility and indicates that the granite aggregates are less resistant to moisture damage compared to the limestone aggregates used in this laboratory study.
LanguageEnglish
Pages2342-2353
JournalJournal of Cleaner Production
Volume112
Issue number4
Early online date31 Oct 2015
DOIs
Publication statusPublished - 20 Jan 2016

Fingerprint

Asphalt
Free energy
Binders
Surface active agents
Moisture
Adhesion
Aging of materials
Goniometers
Asphalt mixtures
Granite
Debonding
Ovens
Angle measurement
Limestone
Contact angle
Materials properties
Thin films
Temperature

Keywords

  • Warm mix asphalt
  • Surface free energy
  • Physico-chemical properties
  • Moisture susceptibility

Cite this

Kakar, Muhammad Rafiq ; Hamzah, Meor Othman ; Akhtar, Mohammad Nishat ; Woodward, David. / Surface free energy and moisture susceptibility evaluation of asphalt binders modified with surfactant-based chemical additive. In: Journal of Cleaner Production. 2016 ; Vol. 112, No. 4. pp. 2342-2353.
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Surface free energy and moisture susceptibility evaluation of asphalt binders modified with surfactant-based chemical additive. / Kakar, Muhammad Rafiq; Hamzah, Meor Othman; Akhtar, Mohammad Nishat; Woodward, David.

In: Journal of Cleaner Production, Vol. 112, No. 4, 20.01.2016, p. 2342-2353.

Research output: Contribution to journalArticle

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