SECTION 555 - BRIDGE DECK WATERPROOF SURFACE COURSE
555.01 Description
This Section describes the requirements for constructing bridge deck waterproof surface course (BDWSC) and retrofit strip seal joint system.
555.02 Materials
555.02.01 Materials
Provide materials as specified: Tack Coat PG 64E-22................................ ................................ ................................ ............................... 902.01.01 Polymer Modified Emulsified Asphalt, Grade CRS-1P ................................ ................................ ............. 902.01.03 Bridge Deck Waterproof Surface Course (BDWSC) ................................ ................................ ..................... 902.14 Retrofit Strip Seal Joint System ................................ ................................ ................................ .................... 902.15 Joint Sealer, Hot-Poured ................................ ................................ ................................ ............................... 914.02 Polymerized Joint Adhesive ................................ ................................ ................................ ......................... 914.03
555.02.02 Equipment
Provide equipment as specified: Materials Transfer Vehicle (MTV) ................................ ................................ ................................ .............. 1003.01 HMA Paver ................................ ................................ ................................ ................................ ................. 1003.03 HMA Compactor ................................ ................................ ................................ ................................ ........ 1003.05 Vibratory Drum Compactor ................................ ................................ ................................ ......................... 1003.06 Bituminous Material Distributor ................................ ................................ ................................ .................. 1003.07 Sealer Application System ................................ ................................ ................................ ........................... 1003.08 Milling Machine................................ ................................ ................................ ................................ .......... 1008.01 Mechanical Sweeper ................................ ................................ ................................ ................................ ... 1008.03 Hot-Air Lance ................................ ................................ ................................ ................................ ............. 1008.06 HMA Plant................................ ................................ ................................ ................................ .................. 1009.01 HMA Trucks ................................ ................................ ................................ ................................ ............... 1009.02 Provide a thin-lift nuclear density gauge according to ASTM D 2950. NOTE: A Spray Paver as specified in 1003.04 may be used in lieu of a HMA Paver.
555.03 Construction
555.03.01 Bdwsc
A.Paving Plan. At least 20 days before the start of placing the BDWSC, submit to the RE for approval a detailed plan of operation as specified in 401.03.07.A. Include in the paving plan a proposed location for the test strip.
B.Weather Limitations. Do not place BDWSC if it is precipitating. Do not allow trucks to leave the plant when precipitation is imminent. The Contractor may resume operations when the precipitation has stopped and the surface is free of water. Do not pave if the base temperature is below 50 °F.
C.Test Strip. At least 14 days prior to the production of BDWSC, construct a test strip of the BDWSC at a location agreed upon with the RE. Ensure that the tack coat has been placed as specified in 555.03.01.D before placing BDWSC. Transport and deliver, spread and grade, and compact as specified in 555.03.01.E, 555.03.01.F, and
555.03.01 G, respectively, and according to the approved paving plan. Construct a test strip of at least 60 tons. While
constructing the test strip, record the following information and submit to the RE:
1.Ambient Temperature. Measure ambient temperature at the beginning and end of each day’s paving operation.
2.Base Temperature. Measure the surface temperature of the existing base before paving.
3.HMA Temperature. Measure the temperature of the HMA immediately after placement.
4.Roller Pattern. Provide details on the number of rollers, type, and number of passes used on the test strip.
5.Nuclear Density Gauge Readings. Obtain the maximum density from the plant, and input it into the nuclear density gauge. Use the nuclear density gauge to read the bulk density and percent air voids.
6.Quality Control Core Density Test Results. Take 5 randomly selected quality control cores to test for the bulk specific gravity and the maximum specific gravity. Use drilling equipment with a water -cooled, diamond-tipped masonry drill bit that produces 6 inch nominal diameter cores for the full depth of the pavement. Remove the core from the pavement without damaging it. After removing the core, remove all water from the hole. Fill the hole with HMA or cold p atching material, and compact the material so that it is 1/4 inch above the surrounding pavement surface. Compare the nuclear density gauge readings and the core test results to establish a correlation. Use this correlation as a guide for the continued use of the nuclear density gauge for density control. When a spray paver is used, during the test strip or prior to starting the paving operation, operate spray paver without mix to verify tack coat application rate and demonstrate full tack coat coverage as specified in 401.03.02 to the RE. Only after the RE approves the tack coat application and coverage, then proceed with the test strip. If the test strip does not meet requirements, make adjust ments and construct a second test strip. If the second test strip does not meet requirements, suspend paving operations until written approval to proceed is received. Before making adjustments to the paving operations, notify the RE in writing.
D.Tack Co at. Ensure that the surface where the BDWSC is to be placed is clean of foreign and loose material. Immediately before beginning paving operations, ensure that the surface is completely dry. Use propane torches or other methods acceptable to the RE to dry the surface. Only apply tack coat that can be paved over in the same day. Apply tack coat 64E -22 at a rate of 0.25 ± 0.05 gallons per square yard and at a spraying temperature of 325 °F ± 25 °F. When using a spray paver for BDWSC, apply polymer modified tack coat as specified in 401.03.02. Adjust the spraying temperature and application rate to produce a uniform coating with no excess material. Ensure that the tack coat is fully cured prior to placing the BDWSC. To prevent tracking of the tack coat onto the HMA paver and HMA truck tires, spread a small amount of clean dry sand over the tack coat prior to opening to construction equipment traffic. Apply a 1/8 inch thick, uniform coating of polymerized joint adhesive to vertical contact surfaces of curbing, gutters, scuppers, parapets, and other structures before the placing of the BDWSC against them. Apply the polymerized joint adhesive slowly to ensure an even coating thickness.
E.Transportation and Delivery of HMA. Transport and deliver BDWSC as specified in 401.03.07.D.
F.Spreading and Grading. Ensure that required deck repairs have been completed before placing the BDWSC. Place BDWSC at the lay down temperature recommended by the supplier of the asphalt binder or the supplier of the asphalt modifier if the dry mix modified process is used. Spread and grade BDWSC as specified in 401.03.07.E.
G.Compacting. Compact the BDWSC as specified in 401.03.07.F. Operate rollers in static mode only.
H.Opening to Traffic. Remove loose material from the traveled way, shoulder, and auxiliary lanes before opening to traffic. Do not allow traffic or construction equipment on the BDWSC until the surface temperature is less than 170 °F.
I.Air Void Requirements. Use a thin-lift nuclear density gauge to measure in -place bulk specific gravity. Correct the reading using correction factor developed during the test strip. Calculate the air voids using the maximum specific gravity supplied by the QC technician at the HMA plant. Compact the mixture so that the air voids are a maximum of 3 percent.
K.Treatment of Fixed-End Deck Joints. Verify that the fixed-end joint and the type of header.
1.If there is an existing header, repair the end of the deck and header and retrofit the joint with neoprene sealing element using elastomeric or polymer concrete as per manufacturer’s requirements.
2.If there is no existing header and joint width is 1 1/2 inch or more, repair the end of the deck , and retrofit the joint with neoprene sealing element using elastomeric or polymer concrete as per manufacturer’s requirements.
3.If there is no existing header and th e joint width is less than 1 1/2 inch, repair the end of the deck before the BDWSC overlay . After the BDWSC overlay, sawcut 3/4 inches wide by 3/4 inches deep and seal with hot-poured sealer at interface between the end of the deck and the approach roadway. Before paving over existing pavement, identify joint locations and maintain references throughout the paving operations. Perform sawcutting between 1 and 5 days after placement of the BDWSC overlay. Ensure that the transverse joints are sawcut from curb to curb. After sawcutting, immediately collect the slurry from the sawcut cavity and surrounding pavement surface and dispose of as specified in 201.03.01.H. Clean sawcuts with a 150 pounds per square inch water blast to remove remaining debris in the sawcut cavity, and then blow sawcuts with a hot -air lance to provide a dry surface. Immediately after blowing, seal the joint with hot-poured joint sealer prepared according to the manufacturer’s recommendations. Do not heat joint sealer at the pouring temperature for more than 6 hours and do not reheat. Fill the sawcuts so that after cooling the level of the sealer is not more than 1/4 inch above, or less than 1/8 inch below, the surface. Do not spread sand or other fine material on the sealed joints. Allow joint sealer to cure to prevent pickup before opening to traffic.
555.03.02 Retrofit Strip Seal Joint System
A.Working Drawings. Submit working drawings for certification for the retrofit strip seal joint system as specified in
105.05 As a minimum, include the following information of the working drawings:
1.Manufacturer’s requirements for materials in the joint system.
2.Method of installation including sequence of installation, temperature restrictions, and materials handling requirements.
3.Ensure that the removal and reinstallation of the strip seal can be accomplished from above the joint without full closure of the roadway.
4.Method to be used to ensure that the strip seal does not protrude above the top of the joint. B Manufacturer’s Representative and Recommendations. Submit 2 copies of written installation procedures and material certifications 14 days prior to the first scheduled installation to the RE. Arrange with the manufacturer of the joint system to assign a representative who is completely knowledgeable and competent in all aspects with the joint systems materials and installation procedures. Ensure that the representative is present during each joint system installation to assure proper construction, material preparation, installation, and curing. The representative is responsible to advise the RE and the Contractor that t he correct installation methods are being followed, to train assigned personnel in the correct methods of installation, and to verify proper installation of the joint in writing to the RE.
C.Weather Limitations. Follow the manufacturer’s instructions regarding weather limitations.
D.Preparation. Center the joint installation over the existing expansion joint gap and to the width determined by the manufacturer. Variation in the width of the joint may be necessary to accommodate site conditions. Sawcut the pavement transversely at the determined width along the joint to a 2 inch minimum depth. To permit the new joint system to be installed, remove all material, including wearing surface, masking or covering material, waterproofing membrane, concrete header, and old joint material between the sawcuts. If it is necessary to remove concrete, use only hand held tools. Remove existing materials without damaging existing sound concrete that is to remain. Use elastomeric or polymer concrete to repair any damage to sound concrete. Grit blast all joint surfaces, dry and free of dust, dirt, grease, loose materials, and any other matter that will inhibit bonding. Clean the concrete surface to the satisfaction of the manufacturer’s representative.
E.Installation Elastomeric or Polymer Concrete. Form the joint and install hardware, if necessary. If hardware is installed to mechanically hold the strip seal gland, ensure that it is placed at the proper depth for the joint. Mix and place the elastomeric or polymer concrete according to the manufacturer’s recommendations. Open to traffic according to the manufacturer’s recommendations.
F.Installation Strip Seal Gland. Prepare the surfaces and the strip seal gland. Install the strip seal gland according to the manufacturer’s recommendations. Ensure that the strip seal gland is in stalled to the proper depth and does not protrude above the top of the joint. Open to traffic according to the manufacturer’s recommendations.
555.04 Measurement and Payment
The Department will measure and make payment for Items as follows: Item Pay Unit BRIDGE DECK WATERPROOF SURFACE COURSE TON RETROFIT STRIP SEAL JOINT SYSTEM LINEAR FOOT TACK COAT 64E-22 GALLON The Department will measure BRIDGE DECK WATERPROOF SURFACE COURSE by the ton as indicated on the certified weigh tickets, excluding unused material. The Department will measure TACK COAT 64E-22 by the volume delivered, converted to the number of gallons at 60 °F as calculated by the temperature-volume correction factors specified in 902.01. The Department will make payment for POLYMER MODIFIED TACK COAT as specified in 401.04. The Department will make payment for POLYMERIZED JOINT ADHESIVE as specified in 401.04. The Department will measure RETROFIT STRIP SEAL JOINT SYSTEM in linear feet from curb to curb along the bridge deck joint.
Referenced in this section
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Source: Standard Specifications for Road and Bridge Construction, 2019 (rev. 2022-12-21) Edition. Pages 313–316 of 651. View official source ↗