01336798

Component

https://doi.org/10.3141/2208-07

http://scholar.google.com...ahia&publication_year=2011

The use of recycled asphalt pavements (RAP) and recycled asphalt shingles (RAS) as components of new asphalt mixes is expected to reduce construction costs, protect the environment, and conserve dwindling natural resources. However, the use of high percentages of RAP and RAS requires mix adjustments to accommodate the stiffer binder, which in turn requires quantification of the effect of the RAP and RAS binder on the fresh binder used in the mixture. Current methods for such estimates are performed on the basis of either chemical extraction and recovery of the binder or backcalculation from gyratory compacted samples. The former is not desirable because of the unknown effects of the chemical solvents on the binder, and the latter requires extensive laboratory work and resources. This paper modifies the analysis procedure for estimating the low-temperature properties of RAP binder by means of testing mortars and binders in the recently developed bending beam rheometer. The modified testing procedure was verified by testing artificial RAP materials, and found capable of estimating low-temperature grade of aged binder within 1°C of the known grade. Furthermore, the application of the procedure to RAS allowed for the introduction of the basis for the development of RAP and RAS blending charts to estimate the final grade of blended binder in mixtures. The feasibility of extending the procedure to study the effect of RAP and RAS on binder fracture properties is also presented in this paper.

01356747

11-2470

English

pp 48-55

2011

Transportation Research Record: Journal of the Transportation Research Board

9780309167390

Print

Figures (7) ; References (14) ; Tables (4)

Asphalt mixtures; Bituminous binders; Blends; Fracture properties; Low temperature tests; Mix design; Recycled materials; Rheometers; Shingles

Asphalt shingles; Bending beam tests; Performance grades

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

TRIS, TRB, ATRI

Feb 17 2011 6:10PM

• Effect of Mineral Filler Characteristics on Asphalt Mastic and Mixture Rutting Potential
• Effects of Recycled Asphalt Pavement Amounts on Low-Temperature Cracking Performance of Asphalt Mixtures Using Acoustic Emissions
• Fatigue Evaluation of Warm-Mix Asphalt Mixtures: Use of Uniaxial, Cyclic, Direct Tension Compression Test
• Full-Scale Structural Evaluation of Fatigue Characteristics in High Reclaimed Asphalt Pavement and Warm-Mix Asphalt
• Hot-Mix Asphalt That Contains Nickel Slag Aggregate: Laboratory Evaluation of Use in Highway Construction
• Influence of Production Temperature and Aggregate Moisture Content on the Initial Performance of Warm-Mix Asphalt
• Low-Temperature Fracture Characteristics of Selected Warm-Mix Asphalt Concretes
• Novel Moisture-Conditioning Method for Adhesive Failure of Hot- and Warm-Mix Asphalt Binders
• Performance Characteristics of Thin-Lift Overlay Mixtures: High Reclaimed Asphalt Pavement Content, Recycled Asphalt Shingles, and Warm-Mix Asphalt Technology
• Performance Evaluation of Asphalt Mixtures with High Recycled Asphalt Pavement Content
• Practical Method to Understand the Effect of Aggregate Drying on the Moisture Content of Hot-Mix Asphalt
• Rutting Resistance of Asphalt Concrete Mixtures That Contain Recycled Asphalt Pavement
• Use of Data from Specific Pavement Studies Experiment 5 in the Long-Term Pavement Performance Program to Compare Virgin and Recycled Asphalt Pavements