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Waterproof Lift  Pits Sheet  Membrane:  


A multiple component sheet membrane waterproofing system.

 

Key Benefits Summary

 

Multi layer/dual waterproofing system

Long life HDPE

Installation made easy

Suitable for use with shotcrete

 

PRODUCT INFORMATION

 

DESCRIPTION

 

Paraseal LG is a multi-layer sheet membrane waterproofing system. It consists of a self-sealing, expandable layer of bentonite laminated at the rate of approximately 4.8Kg per square metre to an impermeable, high density polyethylene (HDPE). The third component is a protective layer of spun polypropylene. Together, these three components form a tough, high performance waterproofing membrane manufactured in controlled thicknesses of 4.25mm to 5mm, specially designed for blindside installations such as lagging, under floor and elevator pits. Paraseal LG also withstands applications where shotcrete is blown directly into the face of the membrane.

 

BASIC USES

 

Paraseal LG is especially effective when waterproofing from the blindside (lagging etc.) where the waterproofing membrane is applied before the walls or floor are poured. It is designed to resist damage from multiple exposure to inclement weather, extremely abrasive concrete pours or direct installation of shotcrete. Paraseal LG will also exhibit outstanding protection against water intrusion in areas of high water heads. Its special weather treatment allows Paraseal LG to be installed for relatively long periods of time before the walls are poured.

 

LIMITATIONS

 

If groundwater is brackish, consult Tremco. Do not apply in standing water or over snow.

 

PACKAGING

 

1.2m x 7.4m standard rolls.

 

NOTE: This specification data is not complete. Use installation guidelines from the specification manual for detailed information.

 

USAGE GUIDELINES

 

INSTALLATION

 

For complete details, refer to the appropriate Paraseal LG installation manual. All blindside installations have the bentonite side facing the installer.

 

Preparatory Work:

 

Examine all surfaces prior to starting application. All spaces between lagging larger than 25mm shall be covered with 6mm plywood prior to installation.

 

Lagging:

 

Paraseal LG may be installed in a vertical or horizontal direction. Lap joints 75mm shingle fashion (top over bottom) when pouring against, 150mm shingle fashion

(bottom over top) when shotcreting against. Trowel Paramastic or Vulkem 201 T around all tiebacks and penetrations. Protect from flooding prior to concrete pour.

 

Earth:

 

Paraseal LG may be used to cover earth design cuts which are to serve as the external side of a vertical wall form. Overlap joints 100mm to 150mm depending on regularity of soil cut.

 

Buried Forms:

 

Paraseal LG may be directly attached to forms which are to be left in the earth after the concrete is poured (i.e. elevator pits, sumps, etc.) Overlap joints min 75mm.

 

Under Floor:

 

Paraseal LG is installed whenever direct contact of the bentonite and floor slab are desired. Paraseal LG will form an instant seal to floor area. Overlap joints 75mm.

May be installed over consolidated earth, sand or mud slab.

To establish a moisture vapour protective barrier beneath the floor, all seams are sealed with Permanent Seam Tape.

 

Penetrations:

 

Tiebacks, tie bolts, misaligned soldier piles, whalers and bracking may all penetrate the Paraseal LG membrane. Should this occur, contact your Tremco representative.

 

Protection:

 

The Paraseal LG dual waterproofing system has a PUNCTURE RESISTANCE of 43Kg. and does not require an additional protection course for most applications. For special applications, please contact your Tremco representative for details.

 

Storage:

 

Protect from moisture. Store on skid or pallet, cover with polyethelene or tarp. Do not double stack pallets.

 

PHYSICAL PROPERTIES  

Value

Test Method  

Pliability: 180 bend over  

10,000

ASTM D146

25mm mandral @ -3 C  

 

 

Tensile Strength: membrane (PSI)  

 

4,000PSI

ASTM D412  

 

 

Resistance to microrganisms

(bacteria, fungi, mould, yeast)  

unaffected

 

Elongation - ultimate failure of membrane  

700%

D638 Type 4

Dumbell

Puncture Resistance  

43Kg

FTMS 101B

Resistance to Hydrostatic Head

(m of water)

46m

ASTMD751

Method A

Footnote #4

Resistance to water migration under membrane:zero leakage  

46m/head

Footnote #1

Water migration at or through joint  

Instant Seal / no penetration

Footnote #5

Perm    rating ASTM E96  

0.03

 

Permeance co-efficient of permeability  

2.7 x 10-13 cm3/cm2/sec.

Footnote #4

Cycling over 38mm joint  

No deterioration

Footnote #2

Cycling over 6.3mm crack 250 cyc.  

No deterioration

Footnote #3

Installation temperatures  

-27.5 C to 50 C

 

 

Non toxic: Do not ingest

Freeze/thaw cycles: No effect before or after installation

Non Staining

Resistance to chemicals and gases: Extremely high resistance - contact manufacturer for specific information.

Life Expectancy: Both high density polyethylene and bentonite have life expectancy measurable in the thousands-of-years.

 

FOOTNOTES FOR TECHNICAL DATA:

 

1. A 2.5cm diameter hole was cut in the middle of a 8.8cm diameter sample of Paraseal LG. Sample clamped in 7.5cm diameter permeameter, 46m waterhead applies.

2. Membrane placed between 2 clamps 3.8cm apart. Temperature reduced to -27.5 C and clamps are pulled apart to 6.5cm. Cycle repeated between 3.8cm and 6.3cm - 2000 times.

3. Membrane placed between 2 butting clamps. Clamps spread at -27.5 C. Cycle repeated 250 times.

4. Membrane applied to porous stone and placed in permeamerter. Pressure increase to equivalent of 46m water head.

5. Test same as #4 only performed at joint.
6. Above values on 20 mil HDPE system

 

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