5-222 SECTIO N 524 – JOINT SEALER 524.0 1 DESCRIPTON . This work shall consist of furnishing and placing a joint sealer of the type specified at the locations shown on the Plan s. 524.0 2 MATERIALS . Materials shall meet the requirements of the following subsection s: Joint Sealer, Hot Poured ................................ ................................ ............................ 707.0 2(a) Joint Sealer, Cold Poured ................................ ................................ ........................... 707.0 2(b) Backer Rod ................................ ................................ ................................ ................. 707.0 2(c) Joint Sealer, Polyurethane ................................ ................................ .......................... 707.0 3 Asphaltic Plug Joint s for Bridges ................................ ................................ .............. 707.1 3 524.0 3 TEMPERATUR E LIMITATIONS . The joint sealer shall be applied per the manufacturer’s recommendations, however, the ambient air and pavement temperatures shall be greater than 40°F at the time of application. 524.0 4 SAWED JOINTS . Roadway or bridge deck joints shall be formed by means of concrete floor sawing equipment capable of dry -cutting the designed joint in a single pass. The joint shall be cut and sealed in one continuous operation. The sawe d joint shall not be exposed to traffic until after the sealer has been placed, cured, and is not subject to picking. Joints sawn in bituminous concrete pavement shall be filled and sealed with hot poured or cold poured joint seale r or asphaltic plug joint binder, appropriate backer rod, and an approved bond breaker. When placing new bituminous concrete pavement, each lift of pavement shall be scored with a single blade cut to a depth of 75% of the lift thickness, at the location of the center of the proposed joint. This work shall be completed prior to exposing the lo cation to traffic or, where traffic is not maintained, the same working day that the lift of pavement is placed. The sawed joint in the newly placed wearing course shall be cut and sealed within 24 hours of paving. If the joint location will not be exposed to traffic, the Engineer may allow the Contractor an additional 48 hours to cut and seal the joint. The width of the sawed joint shall be as shown on the Plan s or may be adjusted by the Engineer for seasonal temperature variations. The depth of the sealan t shall be approximately 50% of the width of the sawn joint when hot or cold poured materials are specified in the Contract. The equipment for sawing the single blade cut shall be on the project and approved by the Engineer prior to beginning paving operat ions. 5-223 524.0 5 PREPARATIO N OF JOINTS . Surfaces to which the joint sealer is to adhere shall be free of all foreign material, including curing compound, oil, dirt, sawing film, laitance, and rust. All surfaces shall be thoroughly dry before placing joint sealers.
a.For Poured or Preformed Jo int Sealers . Prior to placing poured or preformed joint sealers, the vertical faces of the sawed joint and the horizontal pavement surfaces within 1 inch of the joint edge shall be thoroughly blast -cleaned to improve joint sealant adhesion. The resulting d ust, blasting debris, etc. shall be removed with a blast of high -pressure air or industrial vacuum equipment. Regardless of the cleaning method used, the Contractor shall take all necessary precautions to avoid contaminating the other project construction work with the removed dust and debris.
b.For Polyurethane Joint Sealer . Prior to placing polyurethane joint sealer, the concrete surface shall be blast -cleaned to remove surface mortar and expose underlying aggregate. Blast -cleaning equipment shall be operated such that no oil is introduced into the air line. Surfaces formerly sealed with other sealers shall be bush -hammered or sawed to clean the material and then blast -cleaned. Steel surfaces shall be blast cleaned to the bare metal. Primer shall be applied immediately after the blast -cleaning is completed. Epoxy mortar surfaces shall be cleaned by use of suitable solvents or by blast -cleaning as required. 524.0 6 PLACEMENT .
a.Joint Sealer, Hot Poured . The material shall be heated in a double -walled, oil -jacketed kettle equipped with positive temperature controls that allow the sealer to be heated to, and maintained within, a range of 390°F to 410°F or such other temperature range as rec ommended by the sealant manufacturer. The kettle shall arrive on the project empty. Heating of the sealant to the placement temperature and maintaining the sealer at placement temperature shall not exceed six hours. The Contractor shall empty the kettle be fore heating more material. New material shall not be added to a partially filled kettle and cooled material shall not be reheated. Prior to pouring the sealant into the joint, a heat -resistant backer rod shall be placed in the bottom of the joint. The rod shall be 1/8 inch greater in diameter than the joint width to ensure a leak -proof seal and to maintain the proper depth of sealant. The rod shall be specifically manufactured for use with hot poured sealants. 5-224 The hot sealant shall be poured into the joint in a single layer, except that multiple layers will be permitted if lateral flow is a problem. The joint shall be slightly overfilled, and the excess sealant shall be leveled with a U - or V-shaped squeegee to provide a thin layer of sealant spread o ver the blast -cleaned horizontal pavement surfaces adjacent to the joint.
b.Joint Sealer, Cold Poured . The two -component material shall be mixed in the container in which it is furnished using 100% of both components. Mix ing shall be accomplished with a variable - speed drill and mixing paddle operated at speeds not greater than 400 rpm for a period of not less than five minutes. Mixing by hand will not be permitted. The mixed sealant may be transferred to a smaller clean co ntainer for ease of pouring. All mixed sealants shall be placed within the 30 minute to 45 minute pot life of the material. Prior to pouring the sealant into the joint, a backer rod shall be placed in the bottom of the joint. The rod shall be 1/8 inch grea ter in diameter than the joint width to ensure a leak -proof seal and to maintain the proper depth of sealant. The rod shall be specifically manufactured for use with poured sealants. The sealant shall be poured into the joint in a single layer, except that multiple layers will be permitted if lateral flow is a problem. The joint shall be slightly overfilled, and the excess sealant shall be leveled with a U - or V-shaped squeegee to provide a thin layer of sealant spread over the blast -cleaned hori zontal pavement surfaces adjacent to the joint.
c.Joint Sealer, Polyurethane . Polyurethane joint sealer shall be placed as shown on the Plan s in accordance with the manufacturer’s recommendations. Joint sealer shall not be installed until concrete has been in place for 28 days. A foam spacer, approved by the Engineer, shall be installed in such a manner as to control the depth of the sealer and give support during its cure time. The foam spacer shall fit tightly against the sides of the opening beneath the sealer. Polyurethane -coated tape, or other strip material approved by the Engineer, shall be applied to those surfaces where bond is not desired. Primer materials shall be applied strictly as specified by the joint seale r manufacturer on the surfaces to which the joint sealer is intended to adhere. Primed surfaces that may have been contaminated by dirt or other foreign material shall be cleaned and primed again prior to the application of the joint sealer. 5-225 The finished surface of the joint sealer shall present a smooth, even appearance. Only minimum tooling of horizontal joints will be allowed. Overlaying or shimming material shall not be applied over material that has cured. When it is necessary to place a portion of a joint, the edge of the cured material shall be primed as specified by the manufacturer prior to placing additional sealer. Any joint sealer that is not completely bonded to the intended surface after being in place for 72 hours shall be removed, the joint prepared again, and the application repeated as specified.
d.Asphaltic Plug Joint Binder . Asphaltic plug joint binder shall only be used in the saw -cut joint as indicated on the Plan s. The material shall be heated in a double -walled, oil-jacketed kettle equipped with positive temperature controls that allow the sealant to be heated to the temperature range recommended by the sealant manufacturer. The kettle shall arrive on the project empty. Heating of the sealant to the placement temp erature and maintaining the material at placement temperature shall not exceed the time interval recommended by the manufacturer. The Contractor shall empty the kettle before heating more material. New material shall not be added to a partially - filled ket tle and cooled material shall not be reheated. Prior to pouring the sealant into the joint, a heat -resistant backer rod shall be placed in the bottom of the joint. The rod shall be 1/8 inch greater in diameter than the joint width to ensure a leak -proof seal and to maintain the proper depth of sealant. The rod shall be specifically manufactured for use with hot poured sealants. The hot sealant shall be poured into the joint in a single layer, except that multiple layers will be perm itted if lateral flow is a problem. The joint shall be slightly overfilled, and the excess sealant shall be leveled with a U - or V-shaped squeegee to provide a thin layer of sealant spread over the blast -cleaned horizontal pavement surfaces adjacent to the joint. 524.0 7 JOINT PROTECTION . The completed joint shall be protected against damage from traffic during the curing time. Polyurethane joint sealer shall be covered with an impervious material to prevent contact with the linseed oil-mineral spirits mixtures, paints, or other materials containing mineral spirits and similar solvents. 5-226 524.0 8 METHO D OF MEASUREMENT . The quantity of Joint Sealer of the kind specified to be measured for payment will be the number of li near feet used in the complete and accepted work. 524.0 9 BASIS OF PAYMENT . The accepted quantity of Joint Sealer of the kind specified will be paid for at the Contract unit price per linear foot . Payment will be full compensation for furnishing, handling, placing, and installing the specified materials, including any required backer rod or bond breaker. Payment will also be full compensation for preparing the joint, including saw -cutting where required, cleaning the joint prior to inst alling the sealer and for furnishing all labor, tools, equipment, and incidentals necessary to complete the work. Payment will be made under: Pay Item Pay Unit
524.11 00 Joint Sealer, Hot Poured ................................ ................................ ........... Linear Foot
524.13 00 Joint Sealer, Cold Poured ................................ ................................ .......... Linear Foot
524.21 00 Joint Sealer, Polyurethane ................................ ................................ ......... Linear Foot
5-227 SECTIO N 525 – BRIDG E RAILINGS 525.0 1 DESCRIPTION . This work shall consist of furnishing and erecting bridge railing and performing repairs to existing bridge railing. 525.0 2 MATERIALS . Materials shall meet the requirements of the following subsection s: Mortar, Type IV ................................ ................................ ................................ ......... 707.0 1(e) Grease Rustproofing Compound ................................ ................................ ................ 708.0 4 Structural Steel ................................ ................................ ................................ ........... 714.02 Anchor Bolts for Bridge Railing ................................ ................................ ................ 714.07 Galvanizing ................................ ................................ ................................ ................ 726.0 6 Metalizing ................................ ................................ ................................ .................. 726.0 7 Bearing Pads ................................ ................................ ................................ .............. 731.0 1 Metal Hand Railing ................................ ................................ ................................ ....732.01 Aluminum Bridge Railing ................................ ................................ .......................... 732.02 Galvanized Box Beam Bridge Railing ................................ ................................ .......732.03 Steel Beam Bridge Railing ................................ ................................ ......................... 732.04 Concrete shall meet the requirements of Section 501 for Performance -Based Concrete, Class PCD unless otherwise specified in the Contract. For any class of concrete that is not included in Section 501 , a shrinkage -compensating admixture shall be added during the initial concrete mixing phase or as recommended by the chemical manufacturer’s product r epresentative. The Contractor shall provide a written recommendation from the chemical manufacturer’s product representative for the appropriate shrinkage -compensating dosage. Reinforcing steel shall meet the requirements of Section 507 . 525.0 3 FABRICATIO N DRAWINGS . The fabricator of steel components furnished under this section shall submit detailed fabrication draw ings in accordance with the requirements of Subsection 105.06 and Section 506 . The Contractor shall submit a bending schedule for concrete bridge railing reinforcement in accordance with the requirements of Subsection 105.06 . These requirements do not apply to work performed under Subsection 525.06(c) or Subsection 525.06(d) .
Source: Vermont Standard Specifications for Construction, 2024 Edition. Pages 636–640 of 1,380.