SECTION 320118 - CRACK SEALING IN FLEXIBLE PAVEMENTS
This master should be used by designers working on Port of Portland construction projects and by designers working for PDX tenants (“Tenants”). Usage notes highlight a few specific editing choices, however the entire section should be evaluated and edited to fit specific project needs.
SECTION 320118 – CRACK SEALING IN FLEXIBLE PAVEMENTS
GENERAL
1. DESCRIPTION
A. This section describes sealing cracks in flexible (asphalt) pavements.
2. RELATED WORK SPECIFIED ELSEWHERE
A. Section 320117, Pavement Repair
3. REFERENCES
A. ASTM: American Society for Testing and Materials
1. ASTM D6690: Standard Specification for Joint Sealants, Hot-Applied, for Concrete and Asphalt Pavements
4. SUBMITTALS
A. Submit manufacturer’s instructions and data for all products prior to application.
PRODUCTS
1. CRACK SEALANT
A. Sealant for cracks in existing asphalt concrete pavement shall be hot poured elastic joint sealant that meets the requirements of ASTM D6690.
EXECUTION
1. CRACK REPAIR IN ASPHALT PAVEMENTS
A. Route existing cracks that are 1/8 inch or more to create a reservoir sized to the manufacturer’s instructions. If no dimensions are recommended by the manufacturer or shown on the drawings, provide a reservoir with a minimum width of 3/8 inch and a width-to-depth ratio of 1:1.
B. If the routing action creates additional raveling, notify the Port for further direction.
C. After routing, clean cracks with a stiff-bristled broom and blow out with compressed air to remove all particulate and foreign material. The joint shall be completely dry when the sealant is applied.
D. Pavement temperature shall be at least 40°F at the time of application of the poured sealant material.
E. Hot applied, rubberized asphalt sealants shall be pre-heated to an ideal pouring temperature of 400°F to 420°F, or in accordance with the manufacturer’s instructions. The entire batch shall be rejected and replaced with new material if the pot temperature exceeds 430°F.
F. Fill cracks uniformly from bottom to top with an approved crack sealant flush with or slightly below the surrounding grade without the formation of entrapped air or voids. If called for on the drawings, a backing material shall be placed as shown. The backing material shall be non-adhesive to the pavement.
G. Apply crack sealant prior to placing overlay or applying surface sealant.
H. Remove excess crack filler from the pavement surface immediately.
Choose one of the following two paragraphs.
I. Sweep up loose debris and properly dispose of material off Port property.
J. Clean up loose debris with a regenerative-air vacuum sweeper and dispose of material off Port property.
END OF SECTION 320118
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