SEALING EXISTING CONCRETE SLOPE PROTECTION JOINTS
PART 1 GENERAL
1.1SECTION INCLUDES
A.Sealing grooves, joints, and cracks for existing concrete slope protection.
1.2RELATED SECTIONS
A.Section 03152: Concrete Joint Control
1.3REFERENCES
A.ASTM C 578: Rigid, Cellular Polystyrene Thermal Insulation
B.ASTM D 4285: Indicating Oil or Water in Compressed Air
C.ASTM D 5249: Backer Material for Use with Cold- and Hot-Applied Joint
Sealants in Portland-Cement Concrete and Asphalt Joints
1.4DEFINITIONS Not Used
1.5SUBMITTALS
A.Manufacturer’s product data sheets and recommended installation
instructions for review.
PART 2 PRODUCTS
2.1MATERIALS
A.Backer Rod
1.Size the diameter of the backer rod to be 25% to 50% larger than
opening at time of installation. For example:
a.0.5 inch backer rod for 3/8 inch opening
b.0.625 inch backer rod for ½ inch opening
c.1 inch backer rod for ¾ inch opening
d.1.25 inch backer rod for 1 inch opening
Sealing Existing Concrete Slope Protection Joints
2.Use a closed cell, polyethylene-foam rod joint filler.
a.Meet the requirements of ASTM D 5249 Type 1 or Type 3.
B.Rigid Plastic Foam
1.Refer to ASTM C 578.
2.Type 9, density of 2 lb/ft3.
C.Joint Sealer (Structures)
1.Refer to Section 03152.
2.2EQUIPMENT
A.Sandblaster/Air Compressor
1.Verify air is free of water and oil according to ASTM D 4285.
PART 3 EXECUTION
3.1GROOVE, JOINT, AND CRACK LOCATIONS
A.Mark the limits of all grooves, joints and cracks that require sealing in the
presence of the Engineer.
1.Seal cracks 1/8 inch and larger.
3.2PREPARE GROOVES, JOINTS, AND CRACKS
A.Remove the existing joint or groove material and all other debris from the
designated grooves, joints, and cracks.
B.Completely remove curing compounds, oil, grease, dirt and any other
foreign materials from the groove, joint, or cracked concrete surfaces by sandblasting.
C.Provide concrete surfaces in the grooves, joints and cracks that are clean
and dry when backing and sealant are placed.
3.3SEAL GROOVES, JOINTS, AND CRACKS
A.Seal the grooves, joints, and cracks as field marked.
1.Use a backer rod when the joint width is equal to or greater than ⅜
inch.
2.Seal horizontal grooves, joints and cracks by starting at one side
and proceed to the other side.
3.Seal vertical grooves, joints, and cracks from the top to bottom.
Sealing Existing Concrete Slope Protection Joints
3.4SEAL WINGWALLS AND BACKWALL JOINTS
A.Place the rigid plastic foam against the surface of all structural members
before placing the joint sealant.
1.Anchor the rigid plastic foam in place with a compatible adhesive.
2.Recess the rigid plastic foam ⅜ inch in the joints so a groove is
formed above the rigid plastic foam filler.
B.Fill the recess above the rigid plastic foam with sealant so the joint is
sealed over completely.
3.5PLACE JOINT SEALER (STRUCTURES)
A.Place the joint sealer (structures) with caulking guns after placing the
backer rod as shown.
1.Apply the sealant when the substrate is at least 50 degrees F and
ambient air temperature is not forecast to fall below 50 degrees F during the application and cure of sealant.
2.Tool the sealant using a concave pointing tool with soap solution
until the joints and recesses are sealed over completely.
3.Finish sealant in a neat and clean fashion.
a.Verify there are no irregular surfaces including peaks and
valleys.
b.Remove sealant outside of the joint.
3.6PROTECTION
A.Prevent sandblasting material and debris from falling into waterways,
pedestrian areas, traffic areas, or onto railroad tracks.
END OF SECTION
Sealing Existing Concrete Slope Protection Joints
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Source: Utah Standard Specifications for Road and Bridge Construction, 2026 Edition. Pages 1186–1188 of 1,331.
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