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?%‘.4 TECHWIC.4L ADVISORY T 3040.30 \iovernber 30, 1990 (5) 7. DPANSION JOINTS -4 L O.ld Figure 1. Recoarnended Keyway Dimensions Bending of tiebars is not encouraged. Where bending of the tiebars would be necessary, it is reconmnended that a two- part threaded tiebar and splice coupler system be used in lieu of tiebars. If tiebars must be bent and later straightened during construction, Grade 40 steel should be used, as it better tolerates the bending. It may be necessary to reapply a corrosion-resistant coating to the tiebars after they have been straightened. When pull-out tests are performed, they should be conducted after the tiebars have been straightened. (6) It is recommended that longitudinal construction joints be sawed and sealed. The reservoir dimensions should be the same as those used for the longitudinal joints. a. Good design and maintenance of contraction joints have virtually eliminated the need for expansion joints, except at. fixed objects such as structures. When expansion joints are used, the <strong>pavement</strong> moves to close the unrestrained expansion joint over a period of a few years. As this happens, several of the adjoining contraction joints may open, effectively destroying their seals and aggregate interlock. b. The width of an expansion joint is typically 3/4-inch or more. filler material is commonly placed 3/4- to l-inch below the slab surface to allow space for sealing material. Smooth dowels are the most widely used method of transferring load across expansion joints. Expansion joint dowels are specially fabricated with a cap on one end of each dowel that creates a void in the slab to accommodate the dowel as the adjacent slab closes the expansion joint, as shown in Figure 2. 3.1.10
FWX TECHNICAL ADVISORY T 502.;. 3: Sovenber 30, 1990 Joint sealant material ,- Joint filler material Dowel bar figure 2. Expansion Joint Detail C. Pressure relief joints are intended to serve the same purpose as expansion joints, except that they are installed after initial construction to relieve pressure against structures and to al leviate potential <strong>pavement</strong> blowups. Pressure relief joints are not recommended for routine installations. However, they may be appropriate to relieve inwninent structure damage or under conditions where excessive compressive stresses exist. Additional information can be obtained from the FHWA Pavement Rehabilitation Manual, Chapter 9. 8. JOINT CONSTRUCTIOy a. .. Concrete Placement (1) A prepaving conference should be considered on all major paving projects. This conference should include the project engineer and the paving contractor and should discuss methods for accomplishing all phases of the paving operation. The need for attention to detail cannot be overstated. . . (2) llhen using dowel baskets, the baskets should be checked prior to placing the concrete to ensure that the dowels are properly aligned and that the dowel basket is securely anchored in the base. It is recommended that dowel baskets be secured to the base with steel stakes having a minimum diameter of 0.3-inch. These stakes should be embedded into the base a minimum depth of 4 inches for stabilized dense bases, 6 inches for treated permeable bases, and 10 inches for untreated permeable bases, aggregate bases, or natural subgrade. A minimum of 8 stakes per basket is recommended. All temporary spacer wires extending across the joint should be removed from the basket. Securing the steel stakes to 3.1.11 . I
Page 1: 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9
Page 4 and 5: h. The most common types of pavemen
Page 6 and 7: Fidh'X TECHSiC.AL .AL1L~!SC!?'r' T
Page 8 and 9: F!-ih'.A TECHN1C.U XDI'IS3RY T 5010
Page 10 and 11: TABLE 3. MAXIMUM RECOMMENDED TIEBAR
Page 14 and 15: . C ‘i!\‘*A . . T’ECHSIC4L .U
Page 16 and 17: CH!\‘.?l TECZSIC'.AL ADVISORY T 5
Page 18 and 19: TIEBAR PULL-OUT TESTS Proper consol
Page 20 and 21: '1iK.A TECHNICAL XDVISCIRY T 5040.3
Page 22 and 23: TECHNICAL PAPER 89-03 -- Benefits o
Page 24 and 25: critical, as the restraint forces d
Page 28 and 29: TECRWICAL PAPER 89-04 -- PREFORMED
Page 30 and 31: maximum expansion. This will allow
Page 32 and 33: When sealing a width of two lanes o
Page 34 and 35: BXAHPLB B: The State elects to chan
Page 36 and 37: References 1. l'Design and Control
Page 38 and 39: Based on Kansas Standard Plan 707.2
Page 41 and 42: 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
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TABLE 3. RANDOM SAMPLING SEQUENCE F
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.FICURE 1. COWEURAT?ON AND NuMBml;
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: __ APPENDIX A. DETAILED DATA FOR
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FHWA TECHNICAL ADVISORY T 5080.14 J
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FHWA TECiNICAL ADVISORY T 5080.14 J
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l.onghJdinal SECTION A-A onalmclion
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1. 2. 3. 4. 5. 6. 7. 8. 9. 10. REFE
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CASE STUDY - CONTINUOUSLY REINFORCE
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serve as a leveling course, to corr
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v. Details of Field Review It was n
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practice, chloride contents above 1
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pavement is constructed, we also re
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Sing1 e Lane Longitudfnal Bat CRCP
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LATERAL LOAD DISTRIBCTION AND THE L
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PURPOSE This paper summarizes data
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.A thxd study was ?e?ormed 5~ :he S
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__. Table 2. Encroachments on outsi
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The results presented by Ezery :\*e
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from the siab edge. The number of t
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-1 5 13 19 25 31 37 43 49 55 51 6i
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.A ::cleoier:Cai ?'.'3iU2::0:: Oi 5
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.M~&$iU~eTle~t!S and eStZbliSkfXl t
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Photos 5 k 6 - Two examples of wide
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0 ,A KC pavement that is widened 18
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13. Gordon K. Ray, ‘Concrete Shou
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I-60 Lmqitudinal CrackFnq - l988 in
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ill operatfms were cm@etM by July 1
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US. Deparmenr ol Transpoftarxx Fede
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FHWA TECHKICAL ADVISORY T 5080.17 J
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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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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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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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