FAQ
About the "Winning Edge"
Does the bentonite fall out of the SuperGroove during handling?
No. CETCO's production process allows most of the bentonite to remain within
the SuperGroove. Even if small amounts of bentonite are lost during
installation, the resulting void spaces are rapidly filled by swelling
bentonite particles immediately adjacent to the SuperGroove.
Will the SuperGroove affect the strength of the Bentomat?
No. The narrow groove affects a tiny percentage of one geotextile component
of Bentomat. The nonwoven geotextile is still securely needlepunched on
either side of the SuperGroove and therefore does not affect the shear or
tensile strength of the product.
Will bentonite extrusion from the SuperGroove leave a void where
preferential leakage can occur downward through the GCL?
No. The bentonite does not leave a large void, and the SuperGroove is
located only where there is already a double layer of bentonite (in the
overlap), so there is no possibility of a “short circuit” around or through
it.
How do I know the SuperGroove is really present?
The SuperGroove is on the bottom of the Bentomat, such that it faces the
installer and inspector as the roll is unrolled and installed. The
SuperGroove is in plain sight throughout the deployment process. Random
checks after installation can also be included in a CQA plan as needed to
document its continuous presence.
Is the SuperGroove present in the upper geotextile component of Bentomat
also?
No. It is only present in the lower geotextile.
How do I specify the Winning Edge?
CETCO has modified its GCL specification guidelines to include generic
language regarding GCL edge treatment. Please visit our GCL engineering
website for the latest Bentomat specification document.
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