3.9.2.3
Sealing Joints
Perform a final cleaning with compressed air immediately preceding, but not
more than 50 feet ahead of the sealing operations. The joint surfaces
shall be dry at the time the sealant is installed. Apply primer evenly to
the joint faces in accordance with the manufacturer's instructions before
placement of the back-up material. Place bond breaker material after the
primer is applied. Fill the joints from the bottom up to the [bottom of
the beveled edge][surface of the concrete]. Depth of sealant shall be
one-half the joint width or as recommended by the sealant manufacturer.
[Commence sealing of joints at the bottom of the slope or wall and continue
up the concrete slope or wall]. Remove excess or spilled sealant from the
concrete surface by approved methods and discard. Install the sealant
using a gun cartridge in such a manner as to prevent the formation of voids
and entrapped air. Do not install sealant material using gravity methods
or pouring pots. Check joints frequently to ensure that the newly
installed sealant is cured to a tack-free condition within the time
specified. Tool the sealant concave immediately after application.
[3.9.3
Installation of Preformed Compression Seals
Install the joint seals with equipment capable of installing joint seals to
the prescribed depth without cutting, nicking, twisting, or otherwise
distorting or damaging the seal and with no more than five percent
stretching of the seal. Cover the sides of the joint and, if necessary,
the sides of the compression seal, with a coating of lubricant, and install
the seal to the depth indicated with joint installation equipment. Coat
butt joints with liberal applications of lubricant.
]3.10
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NOTE: If the referenced specifications are not
included in the project specification, applicable
portions should be inserted here.
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3.10.1
Cement-Based Concrete Overlay
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NOTE: When overlaying mass concrete with a
relatively thin layer of cement-based concrete or
where movement in the base concrete may occur, a
bond breaker should be placed to prevent shrinkage
and restraint cracking of the overlay due to
constraint of the overlay.
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Install anchors and reinforcement [and place bond breaker] as shown on the
drawings. Place, consolidate, finish and cure concrete in accordance with
the 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], except only moist curing will be
permitted.
3.10.2
Polymer-Modified Concrete Overlay
Mixing, placing and curing polymer-modified concrete shall be in accordance
SECTION 03931
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