Hot-Mix Asphalt Overlay Design Concepts for Rubblized Portland Cement Concrete Pavements

Abstract

The Illinois Department of Transportation’s (IDOT’s) first interstate rubblization project was constructed in 1990 on I-57 near Pesotum as part of a rehabilitation study. Hot-mix asphalt overlays (HMA OL) were constructed over a rubblized jointed reinforced concrete pavement (JRCP) with a granular subbase. Excellent performance was achieved on the project, which had accommodated 7.5 million equivalent single-axle loads through 1998. Periodically collected falling weight deflectometer (FWD) data indicate the sections have retained their structural capacity and integrity. HMA fatigue distress has not developed. The success of the project prompted IDOT to consider portland cement concrete pavement (PCCP) rubblization and HMA OL a viable and cost-effective rehabilitation option. Rubblization is particularly appropriate for eliminating reflective cracking and for use when PCCP patching quantities are high or concrete deterioration is in an advanced stage. HMA OL fatigue considerations control the HMA OL thickness requirement for rubblized PCCPs. HMA OLs for rubblized PCCPs, generally in the 150-mm to 250-mm (6-in. to 10-in.) range, are thicker than those used in the traditional PCCP rehabilitation and HMA OL projects. IDOT uses mechanisticempirical (M-E) flexible pavement design procedures for full-depth asphalt and conventional flexible pavements. M-E–based HMA OL design procedures for rubblized PCCPs are being developed. In the M-E design procedures, the tensile strain at the bottom of the HMA layer is used to consider HMA fatigue. The structural behavior and HMA OL fatigue performance of the Pesotum sections are used in the initial development of the M-E–based HMA OL design procedures for rubblized PCCPs. Results from other rubblized PCCP projects are being used to refine and validate the M-E design concepts.

Get full access to this article

View all access options for this article.

References

Thompson

M. R.

NCHRP Synthesis of Highway Practice 144: Breaking/ Cracking and Seating Concrete Pavements. TRB, National Research Council, Washington, D.C., 1989, 45 pp.

Schutzbach

Crack and Seat Method of Pavement Rehabilitation. In Transportation Research Record 1215, TRB, National Research Council, Washington, D.C., 1989, pp. 197–211.

Guidelines for Use of HMA Overlays to Rehabilitate PCC Pavements. Information Series 117. National Asphalt Pavement Association, 1994.

Thompson

M. R.

, VanMatre

, Lippert

, and Jenkins

. HMA Overlay Construction with One-Pass/Lane-Width PCCP Rubblization. Journal of the Association of Asphalt Paving Technologists, Vol. 66, 1997.

Thompson

M. R.

, and Elliott

R. P.

. ILLI-PAVE-Based Response Algorithms for Design of Conventional Flexible Pavements. In Transportation Research Record 1043, TRB, National Research Council, Washington, D.C., 1985, pp. 50–57.

Coree

B. J.

, Galal

K. A.

, and Haddock

J. E.

. Verification of Design Parameters for Overlaid Rubblized PCC Pavement. Final Report. Indiana Department of Transportation, Division of Research, West Lafayette, 1997.

Subgrade Stability Manual. Bureau of Materials and Physical Research, Illinois Department of Transportation, Springfield, 1982.

Portland Cement Concrete Rehabilitation Rubblizing Prior to Overlay with Asphalt Concrete. Technical Bulletin 3. Asphalt Institute, 1989.

AASHTO Guide for Design of Pavement Structures. AASHTO, Washington, D.C., 1993.

10.

Thickness Design—Asphalt Pavements for Highways and Streets. Manual Series 1(MS-1). Asphalt Institute, 1991.

11.

Gomez

, and Thompson

M. R.

. Structural Coefficients and Thickness Equivalence Ratios. Transportation Engineering Series 38, Civil Engineering Studies. University of Illinois, Urbana-Champaign 1983.

12.

Mechanistic Pavement Design. Supplement, Section 7, Illinois Department of Transportation Design Manual. Illinois Department of Transportation, Springfield, 1989.

13.

Full-Depth Bituminous Concrete Pavement Design for Local Agencies. Bureau of Local Roads and Streets. Illinois Department of Transportation, Springfield, 1995.

14.

Conventional Flexible Pavement Design for Local Agencies. Bureau of Local Roads and Streets, Illinois Department of Transportation, Springfield, 1995.

15.

Hill

H. J.

, and Thompson

M. R.

. Early Life Study of the FA409 Full-Depth Asphalt Concrete Pavement Sections. Project IHR-510: Mechanistic Evaluation of Illinois Flexible Pavement Design Procedures. Illinois Cooperative Highway and Transportation Research Program, University of Illinois, Urbana-Champaign, 1988.

16.

Garg

, and Thompson

M. R.

. Mechanistic-Empirical Evaluation of the Mn/ROAD Low Volume Road Test Sections. Transportation Engineering Series 96, Civil Engineering Studies, Illinois Cooperative Highway and Transportation Series 262. University of Illinois, Urbana-Champaign, 1998.

17.

Alvarez

, and Thompson

M. R.

. Mechanistic-Empirical Evaluation of the Mn/ROAD Mainline Flexible Pavement Sections. Civil Engineering Studies, Transportation Engineering Series 97, Illinois Cooperative Highway and Transportation Series 263. University of Illinois, Urbana-Champaign, 1998.

18.

Thompson

M. R.

ILLI-PAVE Based NDT Analysis Procedures. Nondestructive Testing of Pavements and Backcalculation of Moduli. STP 1026. American Society for Testing and Materials, Conshohocken, Pa., 1989.

19.

Thompson

M. R.

Mechanistic-Empirical (M-E) Flexible Pavement Design. In Transportation Research Record 1539, TRB, National Research Council, Washington, D.C., 1996, pp. 1–5.