the project specification, applicable portions
should be inserted here.
**************************************************************************
[For vertical surfaces, construct forms with a chimney at top for placement
and consolidation of concrete.] [Prime surfaces prepared to receive repair
material, using a cement-based grout meeting the requirements of paragraph
Cement-Based Grout, an epoxy resin meeting the requirements of paragraph
EPOXY RESIN, or a latex bonding agent meeting the requirements of paragraph
LATEX BONDING COMPOUND. For cement-based grout, dampen the area with water
prior to applying the grout. Place the concrete immediately after applying
the bonding agent.] Place, consolidate and finish concrete in accordance
with applicable requirements of Section [03300A CAST-IN-PLACE STRUCTURAL
CONCRETE][03301A CAST-IN-PLACE STRUCTURAL CONCRETE FOR CIVIL WORKS][Section
03307 CONCRETE FOR MINOR STRUCTURES]. [Use form and pump method of
placement where placement through a form chimney is not possible. Inspect
concrete surfaces to ensure that no areas remain which would trap air
between the new and existing concrete. Make forms grout tight and brace to
withstand pumped concrete pressures. Provide vents to release air from
within the forms as concrete is placed. Pump concrete into form using
variable output pump of appropriate size.] [Use external vibration only
where internal vibration is not possible. After the cavity is filled with
concrete, install a pressure cap at the form chimney and apply pressure
while the form is vibrated.] [Remove chimney projection after 24 hours.]
Cure in accordance with Section [03300A CAST-IN-PLACE STRUCTURAL CONCRETE][
03301A CAST-IN-PLACE STRUCTURAL CONCRETE FOR CIVIL WORKS][Section 03307
CONCRETE FOR MINOR STRUCTURES].
3.7.6
Spalls at Joints and Cracks
**************************************************************************
NOTE: If the referenced specification is not
included in the project specification, applicable
portions should be inserted here.
**************************************************************************
For spalls to be repaired that are adjacent to joints and working cracks
insert preformed joint filler to the working faces of the spall. Trim
filler to fit shape of the working faces of joint or crack so repair
material is prevented from bypassing filler. Where practicable, extend
filler horizontally and vertically into joint or crack opening. Secure
filler strip in place prior to and during placement of repair material.
[Apply a bond breaker to working faces at keyed joints. Keep bond breaker
off of concrete surface to be bonded.] After the repair material has
completely cured, saw out the top 25 mm (inch) inch of the preformed joint
filler and install joint sealant in accordance with Section 03151A
EXPANSION, CONTRACTION AND CONSTRUCTION JOINTS IN CONCRETE FOR CIVIL WORKS.
3.7.7
Rapid-Hardening Repair Material
Mix and place material in accordance with the manufacturer's
recommendations.
3.8
CRACK REPAIR
3.8.1
Routing and Sealing
**************************************************************************
NOTE: Surface sealing is not effective for active
SECTION 03931
Page 59
Previous Page
