01333320

Component

https://doi.org/10.3141/2208-02

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

This study evaluated the rutting resistance of plant-produced asphalt concrete (AC) mixtures in the laboratory. Nineteen plant-produced AC mixtures were used; these mixtures contained reclaimed asphalt pavement (RAP) amounts that ranged from 0% to 25%. Tests on the mixtures included the dynamic modulus (|E*|) test at multiple temperatures and the flow number (FN) test at 54°C to characterize stiffness and rutting resistance, respectively. Mixtures that contained no RAP showed |E*| values comparable to those that contained 25% RAP in most cases. For most of the 19 mixtures tested, mixtures with lower FNs either contained no RAP, contained 25% RAP, or had PG 64-22 as the design binder grade. Mixtures that contained moderate amounts of RAP (10% and 15%), regardless of design binder grade, had higher FNs than mixtures with either high or low RAP amounts. Statistical analysis showed that the RAP amount was the most significant factor to affect rutting resistance in the mixtures studied. A linear inverse relationship between RAP and FN appeared to describe the data well. As the RAP amount increased, a downward trend occurred in both effective binder content (P sub be) and rutting parameter (G*/sin δ). The effect of RAP on FN was unexpected, because it showed the rutting resistance to decrease with increased RAP. Possible reasons might have been the use of softer asphalt binder in mixtures with higher RAP and the observed decrease in both P sub be and G*/sin δ with increased RAP amounts. More rutting-related mechanistic studies are needed of AC mixtures that contain RAP.

01356747

11-1840

English

pp 9-16

2011

Transportation Research Record: Journal of the Transportation Research Board

9780309167390

Print

Figures (5) ; References (18) ; Tables (5)

Asphalt concrete; Binder content; Dynamic modulus of elasticity; Laboratory tests; Recycled materials; Rutting; Stiffness

Flow number

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

TRIS, TRB, ATRI

Feb 17 2011 5:56PM

• 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
• Estimating the Effect of Recycled Asphalt Pavements and Asphalt Shingles on Fresh Binder, Low-Temperature Properties Without Extraction and Recovery
• 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
• Use of Data from Specific Pavement Studies Experiment 5 in the Long-Term Pavement Performance Program to Compare Virgin and Recycled Asphalt Pavements