© 2010 Utilicor Technologies Inc.
19
Tips for Successful Core Reinstatements
(1)
Make sure the backfill is properly compacted to a level two inches
below the base of the pavement.
(2)
Line the bottom of the hole with 1”-2” bed of pea gravel. Undercut the
bottom of the existing pavement 1” around the circumference of the
hole to allow the pea gravel to infill under the pavement.
(3)
Dry fit the core before reinstating. The core should sit approximately
1/8" below the pavement surface once it is properly dry fitted.
(4)
Clean the areas to be bonded (the inner surface of the hole and the
outer surface of the core), removing any loose debris. Proper
preparation and fit are crucial to a proper reinstatement and a good
bond.
(5)
Add the exact amount of water (2 liters) to the pail by filling to the
bottom of the indicator line; then pour and mix in the dry Utilibond™
powder.
DO NOT ALTER THE RATIO OF WATER TO UTILIBOND
™.
(6)
Mix Utilibond™ using a portable drill powered mixing tool for at least 3
minutes until it reaches a creamy consistency.
(7)
Gently pour Utilibond into the hole, do not disturb base.
(8)
Carefully lower the core into the hole. Keep in mind that set times are
dependent on temperature. Utilibond™ achieves bond strength of
50,000 pounds, -- five times the AASHTO standard -- in just thirty
minutes at 70° F. Colder temperatures will result in proportionately
longer setting times, and higher temperatures will reduce setting
times. Contact Utilicor for cold weather reinstatement procedures.
(9)
To achieve even coverage of the Utilibond™ around the entire core,
using the core puller, rock the core back and forth and from side to
side until Utilibond™ is seen to ooze out around the complete
circumference of the core. This indicates that the entire kerf is filled
with Utilibond™. Remove the core puller, and allow the pilot hole to
completely fill with Utilibond™ and overflow on to the surface of the
core.
