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Concrete Repair Best Practices:
A Series of Case Studies
Prepared by:
Michael Darter, Ph.D., P.Eng.
Applied Research Associates, Inc.
Final Report Prepared for Missouri Department of Transportation
November 2017 Project TR201618 Report cmr17-013
TECHNICAL REPORT DOCUMENTATION PAGE
1. Report No. cmr 17-013 2. Government Accession No. 3. Recipient’s Catalog No.
4. Title and Subtitle 5. Report Date
Concrete Repair Best Practices: A Series of Case Studies Originally prepared June 2017 to
September 2017
Published: November 2017
6. Performing Organization Code
7. Author(s) 8. Performing Organization Report
Michael Darter No.
9. Performing Organization Name and Address 10. Work Unit No.
Applied Research Associates, Inc.
11. Contract or Grant No.
MoDOT project# TR201618
12. Sponsoring Agency Name and Address 13. Type of Report and Period
Missouri Department of Transportation (SPR) Covered
Construction and Materials Division Final Report (July 2013-January 2015)
P.O. Box 270, Jefferson City, MO 65102 14. Sponsoring Agency Code
15. Supplementary Notes
Conducted in cooperation with the U.S. Department of Transportation, Federal Highway Administration. MoDOT
research reports are available in the Innovation Library at http://www.modot.org/services/or/byDate.htm.
This report is available at https://library.modot.mo.gov/RDT/reports/TR201618/cmr17-013.pdf.
16. Abstract
Concrete pavement restoration (CPR) techniques have gained greater national significance as DOT agencies attempt to
further extend infrastructure service lives prior to required major rehabilitation or reconstruction. Various publications
have documented design procedures and materials for CPR techniques, but less has been written about best practices
for their construction, based on information from contractor and DOT agency practitioners. This report consolidates
best practice case studies for six CPR techniques: cross-stitching, dowel bar retrofit, diamond grinding, full depth
repair, partial depth repair and slab stabilization. Technical briefs for each CPR case study have also been written to
accompany the main report. They have been separately published.
17. Key Words 18. Distribution Statement
Acceptance; Best practices; Concrete pavements; No restrictions. This document is available through
Construction and maintenance; Information organization; the National Technical Information Service,
Repairing Springfield, VA 22161.
19. Security Classif. (of this report) 20. Security Classif. (of this page) 21. No. of 22. Price
Unclassified. Unclassified. Pages
119
Form DOT F 1700.7 (8-72) Reproduction of completed page authorized
Concrete Repair Best Practices:
A Series of Case Studies
Final Report
Prepared for
Missouri Department of Transportation
Research Unit
Construction and Materials Division
Prepared by
Applied Research Associates, Inc.
Champaign, Illinois
November 2017
Overview of the Report
This report is a compilation of six individual case studies on different repair methods. In
addition, a technical brief has also been prepared for each case study. They have been separately
published (see list below).
Table of Contents for Case Studies
#1 Cross-Stitching Case Study for Kansas and Other Leading States .......................................................... 7
#2 Dowel Bar Retrofit Case Study for Washington and Other Leading States .......................................... 18
#3 Diamond Grinding Case Study for Utah and Other Leading States ...................................................... 37
#4 Full Depth Repair Case Study for California, Missouri and Other Leading States ............................... 59
#5 Partial Depth Repair Case Study for Minnesota and Other Leading States ........................................... 92
#6 Slab Stabilization Case Study for Missouri ......................................................................................... 107
List of Figures for Case Studies
Figure 1. Kansas DOT, concrete pavement details, cross-stitching of joints and cracks. ........................... 10
Figure 2. Kansas DOT, concrete pavement details, tiebar insertion, RD 723. ........................................... 11
Figure 3. AASHTOWare Pavement ME Design example output for a JPCP CPR grinding project, with
and without DBR. ....................................................................................................................................... 22
Figure 4. Washington State DOT DBR design and plan layout diagram for perpendicular joints.
(Washington State DOT Standard Plan for DBR, A-60.20-03) .................................................................. 23
Figure 5. Washington State DOT DBR design and layout diagram for skewed joints. (Washington State
DOT Standard Plan for DBR, A-60.20-03) ................................................................................................ 24
Figure 6. Washington State DOT DBR placement detail. (Washington State DOT Standard Plan for DBR,
A-60.20-03) ................................................................................................................................................. 24
Figure 7. Washington State DOT DBR cross-section layout diagram. (Washington State DOT Standard
Plan for DBR, A-60.20-03) ......................................................................................................................... 25
Figure 8. Inserting dowel bar assembly into slot. (Photo Courtesy of Jeff Uhlmeyer, WSDOT)............... 28
Figure 9. Texas US 69 JPCP diamond grinding (52% reduction). ............................................................. 38
Figure 10. Survival analysis of diamond grinding of Utah non-doweled JPCP. ........................................ 53
Figure 11. Comparison of service life of non-doweled JPCP with and without CPR in Utah.................... 54
Figure 12. Slab and base replacement. (Caltrans Concrete Pavement Guide, 2015) ................................. 61
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