ASPHALTIC PLUG JOINT
PART 1 GENERAL
1.1SECTION INCLUDES
A.Asphaltic plug joint system for sealing expansion joints.
1.2RELATED SECTIONS
A.Section 03310: Structural Concrete
1.3REFERENCES
A.AASHTO M 111: Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel
Products
B.AASHTO M 270: Structural Steel for Bridges
C.ASTM C 920: Elastomeric Joint Sealants
D.ASTM D 4285: Indicating Oil or Water in Compressed Air
E.ASTM D 5249: Backer Material for Use with Cold- and Hot-Applied Joint
Sealants in Portland-Cement Concrete and Asphalt Joints
F.ASTM D 6297: Asphaltic Plug Joints for Bridges
1.4DEFINITIONS
A.Traffic Bearing Plate – Steel plate to span over the expansion joint width
as shown.
1.5SUBMITTALS
A.Manufacturer’s product data sheet for review.
1.Include recommended installation instructions for information.
B.Certificate of Compliance for the Elastomeric Binder for information.
Asphaltic Plug Joint
PART 2 PRODUCTS
2.1ASPHALTIC PLUG JOINT SYSTEM
A.Provide asphaltic plug matrix and traffic bearing/bridging plates from the
same supplier.
1.Asphaltic plug matrix
a.Includes aggregates and elastomeric binder
b.Meet the requirements of ASTM D 6297.
B.Label containers containing elastomeric binder with the following:
1.Manufacturer’s name
2.Lot or batch number
3.Date of manufacture
4.Date of packaging
5.Date of expiration
6.Manufacturer’s storage and handling recommendations
2.2BACKER ROD
A.Size the diameter of the backer rod to be 25 percent to 50 percent larger
than opening at time of installation. For example:
1.0.5 inch backer rod for 3/8 inch opening
2.0.625 inch backer rod for ½ inch opening
3.1 inch backer rod for ¾ inch opening
4.1.25 inch backer rod for 1 inch opening
B.Use a closed cell, polyethylene-foam rod joint filler.
1.Meet the requirements of ASTM D 5249 Type 1.
2.3PLYWOOD
A.¾ inch thickness
2.4SILICONE JOINT SEALER (HIGH TEMPERATURE)
A.Cold-applied, gun-grade material that cures under field conditions to form
a non-sag, elastomeric joint seal.
1.Meets the requirements of ASTM C 920, TypeS, Grade NS, Class
25 or higher.
a.Includes use T, M or I.
2.Service temperature range meeting or exceeding -40 degrees F to
400 degrees F.
3.Final cure time no more than 24 hours.
Asphaltic Plug Joint
2.5EQUIPMENT
A.Sandblaster/Air Compressor
1.Verify air is free of water and oil according to ASTM D 4285.
PART 3 EXECUTION
3.1PREPARATION
A.Remove existing expansion joint system and asphalt when shown.
B.Asphalt Pavement Preparations
1.Place plywood directly on clean concrete deck to cover the joint
before placing asphalt.
2.Saw cut and remove asphalt to the dimensions shown to create
blockout after asphalt placement.
a.Set saws to cut the ¼ inch less than the full depth of the
wearing surface.
b.Do not allow traffic or construction equipment to cross the
cut edge.
C.Thoroughly clean and dry the entire blockout.
1.Remove small debris using compressed air.
2.Sandblast the length of the blockout to clean remaining debris on
the vertical walls and adjacent deck area.
3.2LIMITATIONS
A.Apply when the outside air temperature is above 40 degrees F, and will
remain above 40 degrees F for the manufacturer's recommended cure time.
B.Do not apply within 24 hours of a rain event, nor if a rain event is
forecasted within 8 hours.
3.3INSTALLATION
A.Install the silicone joint sealer (high temperature) and backer rod below
the parapet surface before installing asphaltic plug joint system.
1.Install when the weather conditions meet the manufacturer’s
installation instructions.
Asphaltic Plug Joint
B.Apply hot binder and backer rod to the joint.
1.Place the top of the backer rod at least 1 inch and no more than the
width of the existing joint, below the bottom of the blockout.
C.Follow the asphaltic plug joint manufacturer’s recommended installation
procedures.
D.Place matrix in lifts according to the manufacturer’s recommendations.
1.Do not exceed a lift height of 1.5 inches.
2.Place matrix to finished grade as shown.
E.Seal top surface of asphaltic plug joint as recommended by the
manufacturer.
1.Extend seal at least 2 inches onto asphalt or concrete surface.
END OF SECTION
Asphaltic Plug Joint
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Source: Utah Standard Specifications for Road and Bridge Construction, 2026 Edition. Pages 1152–1155 of 1,331. View official source ↗