01550546

Component

https://doi.org/10.3141/2524-13

Full-depth reclamation (FDR) with or without various stabilizers has been successfully used as a rehabilitation strategy in California since 2001. Long-term field monitoring on several FDR projects that used foamed asphalt with portland cement as the stabilizer combined with a comprehensive laboratory study resulted in the preparation of guidelines and specification language for this rehabilitation strategy in 2008. However, the design criteria were essentially empirical, in line with California design procedures for a rehabilitation project of this level. Recently, interest has grown in the use of cement, engineered emulsion, and no-stabilizer FDR strategies in addition to foamed asphalt and in the use of mechanistic design in a greater range of rehabilitation projects. Consequently, the research initiative was extended to a second phase including accelerated load testing on an instrumented test track constructed with these four FDR strategies to gather data for developing performance models that could be included in mechanistic–empirical rehabilitation design procedures. This paper summarizes results of the second set of tests in this accelerated loading study, which compared no-stabilizer and portland cement strategies. The portland cement stabilized section outperformed the unstabilized section in all measured aspects. The most notable observation was in relation to rutting performance; the unstabilized section reached a terminal rut depth of 13 mm after approximately 490,000 equivalent standard axle loads were applied, compared with the cement section, which had a rut depth of only 3.0 mm after more than 43.3 million equivalent standard axle loads. No cracking was observed on either section at the end of testing. Advantages of using portland cement over unstabilized pulverized material are clearly evident from the results.

01593959

15-2188

English

pp 133–142

2015

Transportation Research Record: Journal of the Transportation Research Board

9780309369534

Print

Figures (11) ; Photos; References (11) ; Tables (1)

Accelerated tests; Full-depth reclamation; Mechanistic-empirical pavement design; Portland cement; Rehabilitation; Rutting; Test tracks

California

Design; Highways; Maintenance and Preservation; Pavements

PRP, TRIS, TRB, ATRI

Dec 30 2014 12:47PM

• Achieving Safer Roads Through the Use of System Dynamics and Porous Friction Courses
• Alternative Source of Climate Data for Mechanistic–Empirical Pavement Performance Prediction
• Calibration of National Rigid Pavement Performance Models for the Pavement Mechanistic–Empirical Design Guide
• Characterization of Load Transfer Behavior for Bonded Concrete Overlays on Asphalt
• Comprehensive Model for Fatigue Analysis of Flexible Pavements Considering Effects of Dynamic Axle Loads
• Development of Predictive Models for Initiation and Propagation of Field Transverse Cracking
• Effects of Binder, Curing Time, Temperature, and Trafficking on Moduli of Stabilized and Unstabilized Full-Depth Reclamation Materials
• Evaluation and Implementation of PG 76-22 Asphalt Rubber Binder in Florida
• Evaluation of Effects of Variations in Aggregate Base Layer Properties on Flexible Pavement Performance
• Initial Performance of Virginia’s Interstate 81 In-Place Pavement Recycling Project
• Investigation of Different Methods for Obtaining Asphalt Mixture Creep Compliance for Use in Pavement Mechanistic–Empirical Design Software
• Life-Cycle Cost–Based Decision Framework for Failed Portland Cement Concrete Pavement Materials in Indiana
• Mechanism of Transverse Crack Development in Continuously Reinforced Concrete Pavement at Early Ages
• State Design Procedure for Rigid Pavements Based on the AASHTO Mechanistic–Empirical Pavement Design Guide