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Div. 02760
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Guide Spec. No. 221
HI-SPEC®
POLYMERIC HOT-APPLIED SEALANT
PART 1 GENERAL
1.01 SECTION INCLUDES
A. Joint or crack preparation.
B. Joint sealant and application.
1.02 REFERENCES
A. ASTM D 3405.
B. FEDERAL SPEC. SS-S-1401 C.
C. FAA P-605.
D. Corps of Engineers CRD-C 530.
E. AASHTO M 301.
F. State Highway Department Specifications.
G. Canadian Ministries of Transportation.
SPEC NOTE: Remainder of Part 1 as applicable to
specific project to be developed by specifier.
PART 2 PRODUCTS
2.01 ACCEPTABLE MANUFACTURER
A. W. R. MEADOWS, INC.
Nine Locations
2.02 MATERIALS
SPEC NOTE: Use HI-SPEC Polymeric Hot-Applied Sealant for large-scale
joint and crack sealing operations in Portland Cement and asphaltic concrete
pavements because of its excellent cost efficiency long sealant life and
high return on investment. Use to seal expansion and contraction joints
in concrete highways - both transverse and longitudinal joints between
pavements and asphaltic shoulders, and random cracks. HI-SPEC has excellent
bonding properties, high resiliency, ductility and resistance to degradation
from weathering. It will not become brittle at low temperatures; will
not flow or migrate from the joint at temperatures of 140ºF (60ºC).
A. Joint Sealant: SEALTIGHT HI-SPEC Polymeric Hot-Applied Sealant, manufactured by W. R. MEADOWS, INC.
PART 3 EXECUTION
3.01 EXAMINATION
A. Verify substrate conditions under provisions of Section [ ].
3.02 JOINT OR CRACK PREPARATION
SPEC NOTE: Use A. for new construction; use B. for maintenance sealing.
Ideal joint configuration is a 2-to-1 width-to-depth ratio. Use CERA-ROD
Closed-Cell, Heat-Resistant Backer Rod to obtain proper ratio and avoid
three-sided adhesion.
A. Joints must be clean and dry. Remove contaminants on joint surfaces by sandblasting. Blow dust, dirt and laitance out of the joint with oil-free compressed air immediately preceding the sealing operation.
B. Remove existing joint sealant by routing. Remove existing backer materials and replace with CERA-ROD. Rout out joints and cracks less than 1/4 inch (6.35mm) wide to 1/2 inch (12.7mm) minimum width. Clean joint interfaces by sandblasting or mechanical abrasion. Blow out all loose particles with compressed air prior to sealing.
3.03 INSTALLATION
A. Melt hot-applied sealant in accordance with manufacturer's instructions.
B. Observe application information and precautions stated in manufacturer's literature.
C. Fill cracks and joints in asphaltic concrete flush to the surface and strike off clean. Melt only enough material to be poured the same day. Add material to the melter as the sealant is withdrawn during the sealant operation.
D. At the end of each day's sealing operation, draw off all material remaining in the melter and discard. Flush lines clean with SEALTIGHT FLUSHING OIL.
3.04 PROTECTION OF FINISHED WORK
A. Protect finished Work under provisions of Section [01500].
END OF SECTION