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pavement is constructed, we also recommend using full-depth, tied concrete shoulders. 3. Construct a minimum 4-inch asphalt overlay. The AC overlay must be thick enough to bridge the distressed areas. Also, we recommend the State perform repairs of currently distressed areas before placing an overlay. Depending on the thickness of the overlay, this may be only a short range improvement given the amount of corrosion activity occurring in the test sections. Experience in another State with overlays of 2 Inches on corrosion-distressed CRCP has shown good performance for only 3-4 years. They are presently placing 4-to 6-inch overlays on CRCP and expect to get 10 years of service life. There is also a need to improve the shoulders on the project, particularly. the WB outside shoulder east of the truck weigh station. It is evident the trucks are stopping on the shoulder, presumably to avoid passing through open scales. From our discussions with the State engineers, there was a recognition that the thin CRCP overlay, corrosion of the transverse bars and heavier. than expected traffic loadings are major contributors to the distress. The State may wish to consider using epoxy-coated reinforcing steel on an experimental basis in future CRCP pavements. Another State has placed some CRCP having epoxy-coated reinforcing steel. We are not aware they are experiencing any problems, however, the pavements have not been in place long enough to judge long-term performance. VII. Closing Remarks It is highly gesirable to determine the cause of the distress prior to developing feasible rehabilitation alternatives to ensure that the selected strategy corrects the cause of distress. For any pavement rehabilitation project, the States are encouraged to follow the approach for an engineering and economic analysis as outlined in Mr. Barnhart's November 15, 1983, memorandum. Briefly, this includes the following steps: Establish existing condition of pavement. Identify distress. Determine cause of distress. Develop feasible alternatives. Conduct economic (life cycle cost) and engineering analysis of each alternative. Select most appropriate alternative. Design alternative. Provide feedback on performance. We believe thir a logical, practic31 approach to addressing pavement rehabilitation 1 djects. Our observations recommendations and con lusion are based upon a limited review. We do not feel that we can briefly examine a pavement in a short time period and conclusively give the State 3.7.10
the ultimate so'lution for a problem their engineers have been investigating for many months. We appreciate the opportunity to provide an outside opinion and to provide items for consideration. We hope our visit was as beneficial to the State as it was to us. During the field trip, we observed a close working relationship among our Regional Office, Division Office and the State. We think this spirit of cooperation is excellent, and we look forward to continuing to work with the State and our field offices whenever we can provide assistance. 3.7.11
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3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9
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h. The most common types of pavemen
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Fidh'X TECHSiC.AL .AL1L~!SC!?'r' T
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F!-ih'.A TECHN1C.U XDI'IS3RY T 5010
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TABLE 3. MAXIMUM RECOMMENDED TIEBAR
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?%‘.4 TECHWIC.4L ADVISORY T 3040.
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. C ‘i!\‘*A . . T’ECHSIC4L .U
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CH!\‘.?l TECZSIC'.AL ADVISORY T 5
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TIEBAR PULL-OUT TESTS Proper consol
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'1iK.A TECHNICAL XDVISCIRY T 5040.3
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TECHNICAL PAPER 89-03 -- Benefits o
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critical, as the restraint forces d
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TECRWICAL PAPER 89-04 -- PREFORMED
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maximum expansion. This will allow
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When sealing a width of two lanes o
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BXAHPLB B: The State elects to chan
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References 1. l'Design and Control
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Based on Kansas Standard Plan 707.2
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SlJbJect- Dowel Bar Inserters Date
Page 43 and 44: Dowel Bar Placement: pechanical Ins
Page 45 and 46: TABLE OF CONTENTS Abstract . . . .
Page 47 and 48: In July of 1988 this need for addit
Page 49 and 50: _i -. Corinu Procedure: A metal det
Page 51 and 52: PLACEMENT TOLERANCE SPECIFICATIONS
Page 53 and 54: placing dowels in a satisfactory cl
Page 55 and 56: ar inserter. On the first inserter
Page 57 and 58: extensive searches if a problem is
Page 59 and 60: SUMMARY AND CONCLUSIONS (continued)
Page 61 and 62: TABLE 1. DESCRIPIIOR OF PROJECYS IW
Page 63 and 64: TABLE 3. RANDOM SAMPLING SEQUENCE F
Page 65 and 66: .FICURE 1. COWEURAT?ON AND NuMBml;
Page 67: : __ APPENDIX A. DETAILED DATA FOR
Page 70 and 71: FHWA TECHNICAL ADVISORY T 5080.14 J
Page 74 and 75: FHWA TECiNICAL ADVISORY T 5080.14 J
Page 76 and 77: l.onghJdinal SECTION A-A onalmclion
Page 83: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. REFE
Page 86 and 87: CASE STUDY - CONTINUOUSLY REINFORCE
Page 88 and 89: serve as a leveling course, to corr
Page 90 and 91: v. Details of Field Review It was n
Page 92 and 93: practice, chloride contents above 1
Page 96 and 97: Sing1 e Lane Longitudfnal Bat CRCP
Page 99 and 100: LATERAL LOAD DISTRIBCTION AND THE L
Page 101 and 102: PURPOSE This paper summarizes data
Page 103 and 104: .A thxd study was ?e?ormed 5~ :he S
Page 105 and 106: __. Table 2. Encroachments on outsi
Page 107 and 108: The results presented by Ezery :\*e
Page 109 and 110: from the siab edge. The number of t
Page 111 and 112: -1 5 13 19 25 31 37 43 49 55 51 6i
Page 113 and 114: .A ::cleoier:Cai ?'.'3iU2::0:: Oi 5
Page 116 and 117: .M~&$iU~eTle~t!S and eStZbliSkfXl t
Page 118 and 119: Photos 5 k 6 - Two examples of wide
Page 120 and 121: 0 ,A KC pavement that is widened 18
Page 122 and 123: 13. Gordon K. Ray, ‘Concrete Shou
Page 125 and 126: I-60 Lmqitudinal CrackFnq - l988 in
Page 127 and 128: ill operatfms were cm@etM by July 1
Page 129 and 130: US. Deparmenr ol Transpoftarxx Fede
Page 135 and 136: FHWA TECHKICAL ADVISORY T 5080.17 J
Page 139 and 140: L 2 R'RWA TECEXICAL ADVISORY T 5080
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FFIWA TECHNICAL ADVISORY T 5080.17
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FHwA TECHNICAL ADVISORY T 5080.17 J
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7i%iA TZCHKICAL ADVISCRY T 5C80.17
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FHWA TECHNICAL ADVISORY T 5080.17 J
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1. Platerials FHWA TECHNICAL ADVISO
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3. Mixins B. Batchers (1) (2) (3) (
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1. 2. 3. 4. 5. FHWA TECHNICAL ADVIS
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8. TEMPERATURE CONTROL FHWA TECHNIC
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1. SUBBASE TRIYMING FHWA TECHNICAL
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12. 13. 14. TRUCK REGUIREMENTS FHWA
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16. THICKNESS TEST FHWA TECHNICAL A
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25. 26. (cl (d) FHWA TECHNICAL ADVI
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IO IS 20 25 x> Air temp., OC To use
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FHWA TECHNIC= ADVISORY T 5080.17 ju
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FHWA TECHNICti ADVISORY T 5080.17 J
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RSQUIREMENTS 1’. General Retireme
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FHWA TECHNICAL ADVISORY T 5080.17 J
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48Cl Sum&y of State Highway Practic
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Quotatims (con’t~ (30); &lignment
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We recognize that some States have
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