Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 28, Issue 1, Pages 96-103Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2011.08.041
Keywords
Furfural; Bitumen; Asphalt; Asphalt rubber; CRM binder; Activated crumb rubber; Rheology; Stability
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Funding
- Asphalt Rubber Technology Service (ARTS) at Civil Engineering Department, Clemson University, Clemson, South Carolina, USA
- South Carolina's Department of Health and Environmental Control (DHEC)
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The use of furfural (C5H4O2) as an activation agent has been suggested as a method to improve the rheological properties of asphalt binders due to its compatibility with crumb rubber. This study uses five different crude sources and both ambient and cryogenic produced crumb rubber modifiers (CRM). The rheological properties for furfural activated and conventional CRM binders were evaluated using the dynamic shear rheometer (DSR) and the gel permeation chromatography (GPC). The results indicated that furfural activation has variable effects on the properties of the CRM binder. However, the most pronounced effect is shown in the storage stability improvement which will have an effect on the storage of CRM binder. Also, the activation caused a reduction in the ratio of the small molecular size distribution which is considered an improvement in the binder properties. (C) 2011 Elsevier Ltd. All rights reserved.
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