Title:
Custom Concrete Drill Helps Repair
Shear Cracks in Bridge Piers
Author(s):
F. Wayne Stratton
Publication:
Concrete International
Volume:
2
Issue:
9
Appears on pages(s):
118-119
Keywords:
bonding; bridge decks; coatings; cracking
(fracturing); epoxy resins; girder bridges; girders;
maintenance; repairs; sealing; silicone compounds.
DOI:
Date:
9/1/1980
Abstract:
The Kansas Department of Transportation now repairs cracked continuously reinforced concrete deck girder bridges by silicone sealing the crack, vacuum drilling dust-free holes 6 in. (152 mm) apart and 45 deg to the deck surface, crossing the crack plane at about 90 deg, filling the hole and crack plane with epoxy pumped under low pressure, and placing a near full depth length of reinforcing bar into the drilled hole to span the crack by at least 18 in. (0.46 m). The epoxy bonds the bar to the walls of the hole, fills the sealed crack plane, bonding the cracked concrete surfaces back together in one monolithic form and reinforcing the section.