3.1.3.2
Joints With Field-Molded Sealant
Joints shall not be sealed when the sealant material, ambient air, or
concrete temperature is less than 4 degrees C 40 degrees F. When the
sealants are meant to reduce the sound transmission characteristics of
interior walls, ceilings, and floors the guidance provided in ASTM C 919
shall be followed. Joints requiring a bond breaker shall be coated with
curing compound or with bituminous paint. Bond breaker and back-up
material shall be installed where required. Joints shall be primed and
filled flush with joint sealant in accordance with the manufacturer's
recommendations.
3.2
WATERSTOPS, INSTALLATION AND SPLICES
Waterstops shall be installed at the locations shown to form a continuous
water-tight diaphragm. Adequate provision shall be made to support and
completely protect the waterstops during the progress of the work. Any
waterstop punctured or damaged shall be repaired or replaced. Exposed
waterstops shall be protected during application of form release agents to
avoid being coated. Suitable guards shall be provided to protect exposed
projecting edges and ends of partially embedded waterstops from damage when
concrete placement has been discontinued. Splices shall be made by
certified trained personnel using approved equipment and procedures.
3.2.1
Copper And Stainless Steel
Splices in copper waterstops shall be lap joints made by brazing. Splices
in stainless steel waterstops shall be welded using a TIG or MIG process
utilizing a weld rod to match the stainless. All welds shall not be
annealed to maintain physical properties. Carbon flame shall not be used
in the annealing process. Damaged waterstops shall be repaired by removing
damaged portions and patching. Patches shall overlap a minimum of 25 mm 1
inch onto undamaged portion of the waterstop.
3.2.2
Flat Steel
Splices in flat steel waterstops shall be properly aligned, butt welded,
and cleaned of excessive material.
3.2.3
Non-Metallic
Fittings shall be shop made using a machine specifically designed to
mechanically weld the waterstop. A miter guide, proper fixturing (profile
dependant), and portable power saw shall be used to miter cut the ends to
be joined to ensure good alignment and contact between joined surfaces.
The splicing of straight lengths shall be done by squaring the ends to be
joined. Continuity of the characteristic features of the cross section of
the waterstop (ribs, tabular center axis, protrusions, etc.) shall be
maintained across the splice.
3.2.3.1
Rubber Waterstop
Splices shall be vulcanized or shall be made using cold bond adhesive as
recommended by the manufacturer. Splices for TPE-R shall be as specified
for PVC.
3.2.3.2
Polyvinyl Chloride Waterstop
Splices shall be made by heat sealing the adjacent waterstop edges together
SECTION 03150A
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