01045153

Component

https://doi.org/10.3141/2005-06

http://scholar.google.com...gett&publication_year=2007

The purpose of this research was to investigate the influence of reclaimed asphalt pavement (RAP) on the mechanical properties of recycled base materials typical of northern Utah. Two sources of RAP, two sources of base, and five RAP contents were evaluated in a full-factorial experimental design in which the California bearing ratio (CBR) test, free–free resonant column test, and tube suction test were used to measure strength, stiffness, and moisture susceptibility, respectively. A fixed-effects analysis of variance was performed on the collected data. The results indicate that, on average, CBR values decrease between 13% and 29% with each 25% increase in RAP. For stiffness testing at the optimum moisture content determined for each blend, the general trend was a decrease in stiffness from 0 to 25% RAP, followed by a steady increase in stiffness as the RAP content was increased from 25% to 100%. Following a 72-h oven-drying period, however, the general trend reversed; an increase in stiffness occurred as the RAP content was increased from 0 to 25%, and a decrease in stiffness was observed for RAP contents above 25%. For the moisture-susceptible base material tested in this study, additions of 25% and 50% RAP actually increased the moisture susceptibility of the recycled material compared with the neat base, although the blended material was classified as non-moisture-susceptible when the RAP content was 75% or higher. Base stabilization may be required in many instances to ensure adequate strength and durability of recycled materials.

01082341

English

pp 44-52

2007

Transportation Research Record: Journal of the Transportation Research Board

9780309104319

Print

Figures (4) ; References (16) ; Tables (4)

Base course (Pavements); California bearing ratio; Mechanical properties; Moisture content; Recycled materials; Stiffness; Strain (Mechanics); Strength of materials; Subbase materials

Moisture susceptibility

Utah

Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways

TRIS, TRB, ATRI

Feb 8 2007 7:09PM

• Advanced Approaches to Characterizing Nonlinear Pavement System Responses
• Consideration of Finite Slab Size in Backcalculation Analysis of Jointed Concrete Pavements
• Development of Transfer Functions for Spectral Compatibility of Inertial Profilers Used in Long-Term Pavement Performance Program
• Early-Life Performance of Cold-in-Place Pavement Recycling with Foamed Asphalt Technique
• Effectiveness of Transverse and Longitudinal Pavement Grooving in Wet-Skidding Control
• Effects of Slab Temperature Profiles on Use of Falling Weight Deflectometer Data to Monitor Joint Performance and Detect Voids
• Engineering Framework for Self-Consistent Analysis of Falling Weight Deflectometer Data
• Evaluation of New Mechanistic–Empirical Pavement Design Guide Rutting Models for Multiple-Axle Loads
• Evaluation of Rubblized Pavement Sections in Michigan
• Forwardcalculation of Pavement Moduli with Load-Deflection Data
• Noninvasive Measurement of Three-Dimensional Permanent Strains in Asphalt Concrete with X-Ray Tomography Imaging
• Performance Evaluation of Bonded Concrete Pavement Overlays After 11 Years
• Prediction of Wet-Pavement Skid Resistance and Hydroplaning Potential
• Resilient Modulus of Base Course Containing Recycled Asphalt Pavement
• Stripping Detection in Asphalt Pavements with Seismic Methods
• Ultrathin Bonded Wearing Course as Pavement Preservation Treatment for Jointed Concrete Pavements
• Wavelet Analysis of Energy Content in Pavement Roughness and Truck Dynamic Axle Loads