01475497

Component

https://doi.org/10.3141/2371-02

http://scholar.google.com...azar&publication_year=2013

The incorporation of reclaimed asphalt pavement (RAP) into asphalt mixtures exposes some challenges from the design perspective because of the aged asphalt binder in RAP. Steps are being taken to offset the addition of stiff materials, often with the use of rejuvenating additives. This paper summarizes the laboratory evaluation of one of the available biorejuvenating agents called BituTech RAP. High RAP content mixtures used in Manitoba, Canada, were evaluated to study the impact of BituTech RAP on the viscoelastic properties of asphalt mixtures to overcome any possible moisture damage or thermal cracking problems that might arise in such a wet–freeze environment. The laboratory experiment consisted of the production and test of mixtures that contained 15% and 50% RAP, with and without BituTech RAP. The 2S2P1D analogical model was used to generate the complex modulus (E*) of the various evaluated mixtures and to assess the influence of BituTech RAP on the storage and loss moduli. The addition of BituTech RAP improved the moisture resistance of the mixtures that contained RAP, as observed after three freeze–thaw cycles. The addition of BituTech RAP restored the thermal cracking properties of the mixtures revealed by the thermal stress restrained specimen test. The use of BituTech RAP could result in cost savings without the need to use a softer binder, as long as the high-temperature properties of the mixtures were not jeopardized.

01500961

13-2253

English

pp 13-22

2013

Transportation Research Record: Journal of the Transportation Research Board

9780309286947

Print

Figures (6) ; References (13) ; Tables (3)

Asphalt mixtures; Binders; Dynamic modulus of elasticity; Freeze thaw durability; Mix design; Moisture damage; Reclaimed asphalt pavements; Viscoelasticity

Manitoba

Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I31: Bituminous Binders and Materials

TRIS, TRB, ATRI

Feb 5 2013 12:30PM

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• Evaluation of Environmental Susceptibility of Bituminous Mastic Viscosity as a Function of Mineral and Biomass Fillers
• Forensic Study on the Cracking of New Jersey’s Long-Term Pavement Performance Specific Pavement Study Sections
• Laboratory Evaluation of Asphalt Mixtures That Contain Biobinder Technologies
• Long-Term Performance of Pavement with High Recycled Asphalt Content: Case Studies
• Low-Temperature Performance Characterization of Biomodified Asphalt Mixtures That Contain Reclaimed Asphalt Pavement
• Modeling of the Resilient Modulus for Recycled Asphalt Pavement Applications in Base Course Layers
• Moisture Damage Evaluation of Asphalt Mixes That Contain Mining Byproducts: Results from Traditional and Fracture Energy Tests
• Performance Characterization of Asphalt Mixtures at High Asphalt Binder Replacement with Recycled Asphalt Shingles
• Performance Enhancement of Crumb Rubber–Modified Asphalts Through Control of the Developed Internal Network Structure
• Reacted and Activated Rubber: Elastomeric Asphalt Extender