2013-04-19_REVISION - M1990057

• Permit No: M1990057
• IBM Index Class Name: REVISION
• Doc Date: 4/19/2013
• Doc Name: 110‎(d)‎ PERMIT APPLICATION
• Media Type: D
• Archive: No

FIGURE 7 - TYPICAL BENTOMAP INSTALLATION TECHNIQUE
FIGURE 8 - UNROLLING BENTOMAT
5.5
Care must be taken to minimize the extent to which the GCL is
dragged across the subgrade to avoid damage to the bottom
surface of the GCL. Care must also be taken when adjusting
BENTOMAT CLT panels to avoid damage to the geotextile surface
of one panel of GCL by the textured sheet of another panel of
GCL. A temporary geosynthetic subgrade cover commonly
known as a slip sheet or rub sheet may be used to reduce friction
damage during placement.
5.6
The GCL should be placed so that seams are parallel to the
direction of the slope. End -of -panel seams should also be located
at least 3 ft (1 m) from the toe and crest of slopes steeper than
4H:1V. End -of -roll seams on slopes should be used only if the
liner is not expected to be in tension.
5.7
All GCL panels should lie flat, with no wrinkles or folds, especially
at the exposed edges of the panels. When BENTOMAT
geosynthetic clay liners with SUPERGROOVE® is repositioned, it
should be gripped inside the SUPERGROOVE by folding the edge.
5.8
The GCL should not be installed in standing water or during
rainy weather. Only as much GCL shall be deployed as can be
covered at the end of the working day with soil, geomembrane,
or a temporary waterproof tarpaulin. The GCL shall not be left
uncovered overnight. If the GCL is hydrated when no confining
stress is present, it may be necessary to remove and replace
the hydrated material. CETCO recommends that premature
hydration be evaluated on a case -by -case basis. The project
engineer, CQA inspector, and CETCO TR -312 should be consulted
for specific guidance if premature hydration occurs. The type
of GCL, duration of exposure, degree of hydration, location
in the liner system, and expected bearing loads should all be
considered.
coe
www.CETCO.com