| The BG SYSTEM Installation
Process:
Foundation walls formed against
lagging pose a unique waterproofing challenge. Waterproofing
membranes, like bentonite geotextiles, are designed to waterproof
the walls. Where structural expansion joints are designed into
the foundation walls or slabs, the BG SYSTEM is designed to
integrate into these waterproofing membranes.
With a double-width section of the
waterproofing membrane material installed onto the lagging, the crew
marks the centerline location of the forming material that will
create the expansion joint opening.
A hydrophilic-gel-mastic is applied on
both sides of the centerline. The side sheets of the BG SYSTEM
will be embedded into this mastic.
The mastic is applied continuously,
without gaps or voids, even behind in-place rebar.
The BG SYSTEM is hung to align the
center of its sealing gland over the marked center line, and the BG
SYSTEM flashing sheets are pressed into the mastic.
Another coat of mastic is applied over
the BG SYSTEM's side flashing sheets to a width beyond the outer
edge of the flashing sheets.
A full-width sheet of the below-grade
waterproofing membrane is installed up to the belly of the BG SYSTEM
sealing insert and is embedded firmly into the wet mastic beneath.
The process is repeated on the other
side of the joint.
Termination bars supplied as part of
the BG SYSTEM are installed along the edge of the sandwich made
between the waterproofing membranes, mastic, and BG SYSTEM side
flashing sheets.
Termination bars installed both sides.
Close-up of termination bar and
anchors show protruding anchor heads for embedment into the
concrete.
With the BG SYSTEM installation
complete on the walls the inner wall forms can be placed and
concrete can be cast firmly and solidly over the rebar, and against
the waterproofing and BG SYSTEM sandwich.
The BG SYSTEM can be subsequently
welded to MIGUTAN by EMSEAL for
adjacent plaza deck joints or transitioned behind cavity walls for
transition to
COLORSEAL by EMSEAL in the walls. |
