01476021

Component

https://doi.org/10.3141/2372-08

http://scholar.google.com...+Kim&publication_year=2013

This paper presents a simplified viscoelastic continuum damage material model for the evaluation of moisture susceptibility of asphalt concrete. The model is based on cyclic direct tension testing and layered viscoelastic analysis. The visual stripping inspection afforded by digital imaging analysis is also proposed as an intuitive and straightforward method for moisture susceptibility evaluation. These methods were applied to a Superpave® 19-mm hot-mix asphalt mixture and corresponding warm-mix asphalt mixtures modified by a polyethylene wax-type additive with and without an antistripping agent. The fatigue life predicted by the simplified viscoelastic continuum damage and layered viscoelastic analysis models had a strong correlation with the percentage of stripping determined from specimen surfaces that were fractured during cyclic direct tension testing of the hot-mix and warm-mix asphalt mixtures with various asphalt contents. In addition, a polyethylene wax-type additive combined with an antistripping agent was found to provide a longer fatigue life and less stripping than a pure polyethylene wax-type additive. The findings from this paper should provide guidance to agencies and material engineers in developing asphalt binder modifiers that lengthen the fatigue life of pavements and reduce moisture susceptibility.

01501488

13-4695

English

pp 61–71

2013

Transportation Research Record: Journal of the Transportation Research Board

9780309286923

Print

Figures (7) ; References (10) ; Tables (1)

Asphalt concrete; Asphalt pavements; Cyclic tests; Hot mix asphalt; Image analysis; Moisture content; Superpave; Tension tests; Warm mix paving mixtures

Viscoelastic continuum damage model

Highways; Materials; Pavements; I31: Bituminous Binders and Materials

TRIS, TRB, ATRI

Feb 5 2013 12:54PM

• Continuum Coupled Moisture–Mechanical Damage Model for Asphalt Concrete
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• Mix Design Factors to Reduce Noise in Hot-Mix Asphalt
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