PROTECTION JOINTS
Part 1 — General
1.1 Section Includes
A.Sealing grooves, joints, and cracks for existing concrete slope protection.
1.2 Related Sections
A.Section 03152: Concrete Joint Control
1.3 References
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
1.4 DEFINITIONS Not Used
1.5 Submittals
A.Manufacturer’s product data sheets and recommended installation instructions for review.
Part 2 — Products
2.1 Materials
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.
2.2 Equipment
A.Sandblaster/Air Compressor
1.Verify air is free of water and oil according to ASTM D 4285.
Part 3 — Execution
3.1 Groove, 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.
3.2 Prepare 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.
3.3 Seal 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
3.4 Seal 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.
3.5 Place 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.
3.6 Protection
A.Prevent sandblasting material and debris from falling into waterways, pedestrian areas, traffic areas, or onto railroad tracks. Sealing Existing Concrete Slope Protection Joints
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Source: Utah Standard Specifications for Road and Bridge Construction, 2027 Edition. Pages 1200–1202 of 1,343. View official source ↗