Onsite Use of Recycled Asphalt Pavement Materials and Geocells to ...

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Onsite Use of Recycled Asphalt Pavement Materials with Geocells to Reconstruct Pavements Damaged by Heavy Trucks Jie Han, Ph.D., P.E. Professor of Geotechnical Engineering Department of Civil, Environmental, and Architectural Engineering University of Kansas, Lawrence Bhagaban Acharya Graduate Research Assistant Department of Civil, Environmental, and Architectural Engineering University of Kansas, Lawrence Jitendra K. Thakur Graduate Research Assistant Department of Civil, Environmental, and Architectural Engineering University of Kansas, Lawrence Robert L. Parsons, Ph.D., P.E. Professor Department of Civil, Environmental, and Architectural Engineering University of Kansas, Lawrence A Report on Research Sponsored by Mid-America Transportation Center University of Nebraska-Lincoln July 2011
Technical Report Documentation Page 1. Report No. 2. Government Accession No. 3. Recipient’s Catalog No. 25-1121-0001-462 4. Title and Subtitle 5. Report Date Onsite Use of Recycled Asphalt Pavement Materials with Geocells to Reconstruct Pavements Damaged by Heavy Trucks 7. Author(s) Jie Han, Bhagaban Acharya, Jitendra K. Thakur, and Robert L. Parsons ii July 2011 6. Performing Organization Code 25-1121-0001-462 8. Performing Organization Name and Address 10. Work Unit No. Mid-America Transportation Center 2200 Vine St. 262 Whittier PO Box 830851 8. Performing Organization Report No. 11. Contract or Grant No. Lincoln, NE 68583-0851 12. Sponsoring Agency Name and Address 13. Type of Report and Period Covered Research and Innovative Technology Administration Final Report 1200 New Jersey Ave., SE 14. Sponsoring Agency Code Washington, D.C. 20590 MATC TRB RiP No. 28887 15. Supplementary Notes 16. Abstract Asphalt pavements deteriorate with traffic (especially heavy trucks) and time. Maintenance and overlaying may solve minor to medium pavement distress problems. When the condition of a pavement becomes badly deteriorated, reconstruction of the pavement may become an economic and feasible solution. Reconstruction of a pavement requires removal of pavement surfaces. On-site use of recycled asphalt pavement materials has obvious benefits from economic, to environmental, to sustainability points of view. One attractive option is to use recycled asphalt pavement (RAP) materials as base courses with a thin new overlay. However, RAP has its limitations; for example, it creeps under a sustained load due to the presence of asphalt binder. A preliminary study conducted by the principal investigators has shown that the use of geocell to confine RAP minimizes creep of RAP under a sustained load. However, the performance of geocell-reinforced RAP as a base course overlaid by an asphalt surface is unknown. This research will utilize the geotechnical test box available at the University of Kansas to simulate the reconstruction of damaged asphalt pavements by geocell-reinforced RAP bases overlaid by a thin asphalt layer and evaluate their performance under cyclic loading. The main objectives of this research are to confirm the concept of using RAPs with geocells to reconstruct damaged pavements by heavy trucks and examine the benefit of geocells to the pavement life as compared with unreinforced base courses. In this research, at least four test sections will be constructed in the geotechnical test box including control sections and geocell-reinforced sections. The properties of RAP including asphalt binder content and viscosity, aggregate properties, compaction curve, and California Bearing Ratio (CBR) will be evaluated in the laboratory. The subgrade will be prepared using an artificial soil by mixing Kansas River sand with Kaolin and compacted at an intermediate strength (i.e., 5% CBR). The pavement sections will be tested under cyclic loading up to 25-mm rut depth. 17. Key Words 18. Distribution Statement RAP; Recycled Asphalt Pavement; Geocells; Reinforcement; Deformation 19. Security Classif. (of this report) 20. Security Classif. (of this page) 21. No. of pages 22. Price Unclassified Unclassified 121
Page 1: Report # MATC-KU: 462 Final Report
Page 5 and 6: 4.3.4 15 cm Thick Geocell-Reinforce
Page 7 and 8: Figure 4.11 Profiles of the HMA sur
Page 9 and 10: Figure 4.48 The permanent deformati
Page 11 and 12: List of Tables Table 2.1 Percentage
Page 13 and 14: Acknowledgements This research was
Page 15 and 16: Abstract Asphalt pavements deterior
Page 17 and 18: 1.1 Background Chapter 1 Introducti
Page 19 and 20: On-site use of RAP materials has re
Page 21 and 22: Chapter 2 Literature Review Recycle
Page 23 and 24: Protection. Geosynthetics are somet
Page 25 and 26: wet weather conditions. Webster and
Page 27 and 28: subgrade can be improved in terms o
Page 29 and 30: annually in the early 1990s (FHWA-H
Page 31 and 32: Figure 2.2 Usage and potential of v
Page 33 and 34: Table 2.1 Percentage of use of RAP
Page 35 and 36: Type of Property Physical Propertie
Page 37 and 38: permeability values. The addition o
Page 39 and 40: Chapter 3 Material Properties and E
Page 41 and 42: Table 3.1 Properties of the RAP bas
Page 43 and 44: 3.3 Asphalt Concrete Figure 3.4 Sta
Page 45 and 46: Table 3.2 Basic Properties of NPA g
Page 47 and 48: Earth pressure cells were installed
Page 49 and 50: central pocket, and one at the top
Page 51 and 52: plate on one end was buried at the
Page 53 and 54:
loading plate to simulate the rubbe
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3.6.7 Dynamic Cone Penetration Test
Page 57 and 58:
Figure 3.15 Light weight deflectome
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Chapter 4 Experimental Data Analysi
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The quantity of RAP placed in each
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Geocell infilled with RAP Geocell i
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Figure 4.4 Prime coat on the RAP ba
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4.2 Cyclic Plate Load Tests Figure
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dynamic deformation moduli from LWD
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Depth (cm.) 0.00 5.00 10.00 15.00 2
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Depth (cm.) 10 14 18 22 26 Before t
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surface at the center was under ten
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4.3.3 15 cm Thick Geocell-Reinforce
Page 79 and 80:
Depth (cm.) 0 10 20 30 40 50 60 0 5
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The permanent deformation was obtai
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Strain on geocell (%) Figure 4.23 T
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Stress distribution angle (°) 50 4
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Figure 4.28 The calculated dynamic
Page 89 and 90:
Elastic deformation (mm.) 3 2.5 2 1
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Strain (%) 0.15 0.1 0.05 0 -0.05 -0
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Page 95 and 96:
The profiles of the HMA surfaces as
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Figure 4.41 shows the measured maxi
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Figure 4.43 The vertical stress at
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Table 4.5 The average CBR values of
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at the distances of 25 and 50 cm aw
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Strain (%) 0.014 0.012 0.01 0.008 0
Page 107 and 108:
Page 109 and 110:
The profiles of the HMA surfaces as
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Figures 4.58 and 4.59 show the meas
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Strain (%) 0.04 0.02 0 -0.02 -0.04
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4.4 Analysis of Test Data Six cycli
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Table 4.7 Average CBR values of tes
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The percentages of air void of the
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Table 4.10 Number of loading cycles
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Table 4.11 Elastic deformation and
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HMA surface compression (mm.) Base
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strain was higher for the geocell a
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Vertical stress (kPa) 250 200 150 1
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Stress distribution angle ( ̊) 80
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6. The subgrade contributed to most
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Berthelot, C., R. Haichert, D. Podb
Page 137:
Pokharel, S. K., J. Han, D. Leshchi
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