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| Description |
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Butyl rubber is the forerunner to EPDM and is a highly weather
resistant, highly flexible, high elongation and durable membrane.
The long service life of rubber lining applications is dependent
upon the quality of their splices and, therefore, the greatest
of care must be exercised in their fabrication. Factory seams are
vulcanised and quality and strength are very good. Field seams
are glued with a rubber cement, and strength is less than parent
material. Field seams are probably adequate for channel lining
applications, although they can become a source of problems (pers
comm Jay Swihart, 2001).
| Experience |
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Butyl Rubber has been used for channel remediation in the United
States, where the sheets demonstrated effectively no change in
properties after 9 years of service in both a covered and exposed
application.
It is mainly used in long life applications in building works with
some use in pond liners where durability is an important consideration.
| Installation |
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Butyl rubber was originally
proposed for trial at the Lakeview Branch Canal at Murrumbidgee
Irrigation. However, the trial did not proceed, given the cheaper
and superior quality product of EPDM was also proposed to be trialed.
| Durability |
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Estimated lifetime of the exposed liner is 25-40
years.
| Seepage
reduction |
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Estimated seepage reduction
is 85%.
| Cost |
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Quotations received in 2001 to line 200m (approximately 3,500m2)
of the Lakeview Branch Canal were for $21.17/m2.
| Related
pages |
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Flexible membrane lining
techniques
Flexible
membrane materials
Covered liners
High-density
polyethylene (0.75mm)
Geosynthetic
clay liners
Exposed liners
High-density
polyethylene (2mm exposed)
High-density
polyethylene (1.5mm exposed)
Linear
low-density PE and very low-density PE
(1.5mm)
DamSeal
Unreinforced
polypropylene (1mm)
Unreinforced
polypropylene (0.75mm)
Reinforced
polypropylene (1.1mm)
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