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Final cleaning of
the subgrade soil, the stability and the 1:2 inclination
of the slopes. |
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Two available 50 X
150 45 Mil EPDM Pond Gard Jumbo rolls |
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The first Jumbo Roll
was unrolled over the top of the Eastern slope at the
length of its side 31.20 meters |
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The membrane was
extended across to conform to the shape of the surface.
It permitted workers to rest for more than 30 minutes
before entrenching permanently to the ground. |
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Once the Jumbo Rolls
were in place, the workers aimed to minimize wrinkles on
the membrane surface.
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This was done by
blowing air under the membrane to facilitate workers in
stretching it across the surface. |
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Immediately, we made
sure that the material in the tench zone was sufficient
for the mechanical anchor by friction
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Following the
procedure, the excavated material was put in place to
prevent the shifting of the membrane position.
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With the excess EPDM
membrane from the first roll approximately 36 x 50,
workers initiated the task of covering the
remaining zone |
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Afterwards, the
workers unrolled the second Jumbo Roll and cut it 70 x
50 in length. This membrane was then extended to cover
the uncovered section zone. |
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Once everything is
covered, the membranes are aligned so that they overlap
each other by at least 1 foot. The installation of the
Quick Seam 6 adhesive strip is then initiated. |
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The accessories
utilized for the seams were:
Quick Prime cleaner and presser
Quick Seam 6 tape (semi-cured EPDM)
Quick Scrubbers
Silicon Rollers
Quick Seam Pipe Flashings |
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Initially, the filth
was swept away the dust was cleansed with water and the
application of the cleaners and primer and adhesive was
initiated with hand and stand-up scrubbers. The primer
and adhesive amount should be increased in an area where
the membranes meet and in areas covered with noticeable
white dust which accumulates on the membrane. Scrubbing
pads should be replaced every 60 meters.
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Once it was verified
that the adhesive was dry approximately 5 minutes, the
task of installing the Quick Seam 6 tape was initiated
by centering the tape placement on the overlaps of the
membrane..
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As the Quick Seam
tape was being placed on the overlaps, pressure was
being placed on it with 11/2 silicon rollers. |
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Perpendicular and
parrallel movements are required with no areas left
unrolled to provide the best posible adherence. Make
sure to avoid leaving fish mouths. |
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The installation of
the drainage was initiated by placing a layer of EPDM
protection over the base of the concrete. The opening of
the drain hole and the fasteners were done beforehand
using a common perforation of paper to assure blind
cuts.
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The principal
membrane was cut only the necessary holes and another
protective membrane was placed over it. An application
of sealer was added to all layers to assure a mechanical
sealing. |
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Finally, the
stainless steel plate was put in place with its nuts and
½ screws, making it clear that the corners of the plate
need to be made round so that they dont cause damage to
the membrane. |
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Finally, a Pipe boot
was installed for the 11/2 penetration. At the extreme
of the tube where it was cleaned and primed with Quick
Prime, clamping ring was installed and sealer was added.
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Near the end, the
workers that received the training finished the final
overlap and the entrance of the West and South side of
the membrane at the top of the slope.
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