1、Section 19 BRIDGE DECK JOINT SEALS 19.1 GENERAL This work shall consist of the furnishing and installing of joint sealing systems in bridge decks of the types used where significant movements are expected across the joint. These include compression seal joints consisting of preformed elastomeric mat
2、erial compressed and installed in specially prepared joints and joint seal assemblies con- sisting of assemblies of metal and elastomeric materials installed in recesses in the deck surface. Joint seals described in the plans or the specifications as poured joint seals shall conform to the requireme
3、nt of Article 8.9, “Expansion and Contraction Joints.” The type and dimensions or movement rating for bridge deck joint seals at each location shall be as shown on the plans or ordered by the Engineer. All joint seals shall prevent the intrusion of material and water through the joint system. 19.2 W
4、ORKING DRAWINGS If not given on the plans, calculations showing the joint settings for their installation will be required before ap- proval to install joints in any bridge deck can be given. The Contractor will submit working drawings to the En- gineer showing the installation procedure and joint a
5、s- sembly for bridge decks using proprietary joint systems. Also, shop drawings shall be submitted to the Engineer for approval for joints having a total movement of more than 1Ya inches. Working drawings must be approved by the Engineer prior to performance of the work involved and such ap- proval
6、shall not relieve the Contractor of any responsibil- ity under the contract for the successful completion of the work. 19.3 MATERIALS Bridge deck joint seal materials and assemblies shall conform to the following specifications: Preformed elastomeric joint seals of multiple web de- sign shall confor
7、m to AASHTO M 220 (ASTM D 2628). Lubricant-adhesive for use with preformed elastomeric seals shall conform to ASTM D 4070. Deck joint seal assemblies shall be of an approved type for each size required and shall conform to the specifica- tions provided by the manufacturer at the time of ap- proval.
8、Steel and fabricated steel components shall conform to the requirements of Section 23, “Miscellaneous Metal.” 19.4 MANUFACTURE AND FABRICATION 19.4.1 Compression Seal Joints Preformed elastomeric joint seals shall not be field spliced except when specifically permitted by the Engi- neer. 19.4.2 Join
9、t Seal Assemblies Expansion joint assemblies shall be fabricated by the manufacturer and delivered to the bridge site completely assembled, unless otherwise shown on the plans or spec- ified in the special provisions. 19.5 INSTALLATION 19.5.1 General All joint materials and assemblies, when stored a
10、t the job site, shall be protected from damage and assemblies shall be supported so as to maintain their true shape and alignment. Deck joint seals shall be constructed and in- stalled to provide a smooth ride. Bridge deck joints shall be covered over by protective material after installation until
11、final cleanup of the bridge deck. After installation and prior to final acceptance, deck joint seals shall be tested in the presence of the Engineer for leakage of water through the joint. Any leakage of the joint seal will be cause for rejection. 635 636 HIGHWAY BRIDGES 19.5.2 19.5.2 Compression Se
12、al Joints Joints in the roadway area of bridge decks which are to be sealed with compression seals shall be cast to a nar- rower width than required for the preformed material. Such joints in curbs and sidewalks may be cast to full width. Prior to installation of compression seals in joints whose wi
13、dth is narrower than needed, a groove of proper width and depth to receive the preformed material shall be saw cut along the top of the joint. When making saw cuts into the bridge deck, spalling shall be minimized. Both sides of a groove shall be cut si- multaneously to the proper depth and alignmen
14、t as shown on the plans. The alignment of the saw shall be controlled at all times by a rigid guide. The width of the groove will depend on the temperature and age of the concrete and shall be as directed by the Engineer. Lip of saw cut should be bevelled to avoid later breakage. After saw cutting,
15、any spalls, popouts or cracks shall be repaired prior to instal- lation of the lubricant sealant. Saw cuts are not required where armor plates are used. At the time of installation the joint shall be clean and dry and free from spalls and irregularities which might impair a proper joint seal. Concre
16、te or metal surfaces shall be clean, free of rust, laitance, oils, dirt, dust, or other deleterious materials. Premolded elastomeric compres- sion joint seals shall be installed without damage to the seal by suitable hand methods or machine tools. The lu- bricant-adhesive shall be applied to both fa
17、ces of the joint prior to installation and in accordance with the manufac- turers instructions. The preformed elastomeric seal shall be compressed to the thickness specified on the plans or as approved by the Engineer for the rated opening and am- bient temperature at the time of installation, Loose
18、 fitting or open points between the seal and the deck will not be permitted. 19.5.3 Joint Seal Assemblies Expansion joint seal assemblies shall be constructed to provide absolute freedom of movement through a range consistent with that prescribed by the Engineer or as shown on the design plans. Inst
19、allation shall be in accor- dance with the manufacturers recommendations. Final settings of the deck joint seal assembly at the time of cast- ing in the anchorages of the unit depend on the relation- ship of the current temperature of the superstructure to its expected mean temperature, and shall be
20、 as specified by the manufacturer or Engineer or as shown on the plans. 19.6 MEASUREMENT AND PAYMENT Deck joint seals will be measured by the linear foot of acceptable joint seal completely installed by measure- ments made along the slope of the centerline of the joint seal. Payment of linear feet of joint seal as measured, for each type of seal for which separate payment is provided, shall include full compensation for the cost of labor, equipment and materials to furnish and install the deck joint seal.
