Data Sheet

Petrochemical Lining

Place lengths of RAWSEAL® TR35 fillet on the compacted sub-

base tightly against the ring wall and bed them into the

Rawpaste Mastic. Butt joint the lengths of TR35 and knead them together to give a continuous homogeneous mass of fillet around

the ring beam. Place the RAWMAT® HDB onto the compacted sub-base allowing sufficient membrane to lap up the face of the

ring beam and cover the TR35 fillet, press the black geotextile side of the RAWMAT® HDB into the Rawpaste Mastic.

Using a Hilti DS460 gun fix an PVC termination bar 25mm wide by

4mm thick through the top of the RAWMAT® HDB sheet to ensure the membrane is fixed firmly in place. Using a sharp utility

knife, trim the membrane back to a level line around the

circumference of the site. Once the membrane is laid, overlapped and fixed to any structures it must be backfilled with a 300mm

minimum confining material. This material should be soil or ≤10mm granular material. This should be placed and compacted

as part of an ongoing process.

To seal the penetrations through the membrane apply RAWPASTE Mastic onto the penetration where it will pass

through the RAWMAT® HDB Type P membrane and up the pipe penetration 100mm. Cut a length of RAWSEAL® TR35 fillet to fit

around the circumference of the pipe and bed this into the mastic

tight to the pipe. Butt the two ends and knead together to form a continuous homogenous mass. If necessary secure with Tie wire.

Cut a patch of RAWMAT® HDB Type P 450mm larger in all directions than the

diameter of the pipe.

Remove the white non-woven geotextile and make a star cut in the centre of the

patch piece to the diameter of the pipe. Feed the patch over the Pipe and over the

RAWSEAL® TR35, bed the membrane into

the mastic and apply additional mastic to seal the patch to the pipe. Apply

additional mastic to the surface of the patch piece.

INSTALLATION

All projects must be assessed on an individual basis as installation details may differ. For project specific recommendations contact

the Technical Department at Rawell. Installation shall not take place in strong wind, heavy rain or snow. Installation may

continue during light rainfall providing the backfilling process continues until the RAWMAT® HDB Type P is covered with correct

depth (minimum 300mm) of protective layer.

The surface onto which the membrane is to be laid should be

thoroughly compacted to provide a firm smooth surface free of all ruts, sharp objects, roots, debris, stones larger than 10mm and

any protruding objects.

The RAWMAT® HDB Type P should be laid with the black woven geotextile in contact with the prepared substrate and the white

non-woven geotextile uppermost. The unrolling and placement of RAWMAT® HDB should be performed in such a way that the

membrane is not damaged, stretched, folded or creased. If necessary please contact Rawell's Technical Sales Department.

As the tank bases are circular work from the centre of the tank across the tank to the opposite side then continue out from the

middle. Cutting the roll to the shape of the tank then turning the roll round and working back to the centre from the next overlap

will reduce wastage.

Sealed laps are achieved by folding back the top sheet in the overlap, applying a 100mm wide, 1-2mm thick layer of Rawpaste

Mastic to the black geotextile side of the upper sheet. Peeling back the top white non-woven geotextile on the lower sheet in

the lap, installing the adjacent sheet, overlapped to a minimum

of 150mm with the Rawpaste Mastic in direct contact with the bentonite clay core of the lower sheet, and reinstating the white

non-woven geotextile over the entire joint.

Under no circumstances shall the white non-woven

geotextile form part of the overlap seal.

At the edge of the tank or at any vertical plinths or bund walls apply a layer of

Rawpaste Mastic 100mm wide by 1-2mm thick to the base of the vertical face

around the whole circumference of the tank ring wall.

RAWMAT® HDB Type P1 Walled Bund Liner

1M X 5M

A factory pre-hydrated sodium bentonite membrane for

the containment of fuels, oil and other hydrocarbons. The

system provides a cost effective high performance barrier

for applications both beneath tanks and within the bund.

Non-wovenGeotextile

When sealing againsthydrocarbons applyRAWPASTE Masticfor immediate seal

Bentonite forms a homogenous seal between sheets

Woven Geotextile allows intimate contactwith other materials when used as a composite

Pre-hydrated bentonite core

Non-woven polypropylene geotextile

Woven polypropylene geotextile

For details of Rawell products and services visit www.rawell.com where you can find more information suited to your specific needs or call +44 (0) 151 632 5771All information is given in good faith and is correct to the best Rawell Environmental Ltd’s knowledge. This information is not legally binding and may be changed at any time without notice.

Rawell Environmental Ltd., Carr Lane, Hoylake, Wirral, Merseyside, CH47 4AZ. E-mail: postmaster@rawell.com Fax: +44 (0) 151 632 0252

Int. Version : 2010-01-26

Date of Issue :

HANDLING & STORAGE

RAWMAT® HDB Type P1 is rolled on 50mm cores. Each roll is sealed in airtight stretch film. The rolls are packaged on end into boxes, each box containing 25 rolls. The boxes

are sealed with polythene box covers to weatherproof the box. Each box has a unique batch identification code.

The RAWMAT® HDB Type P1 should be stored and handled strictly in accordance with

the manufacturers instructions, given below. Palletised boxes may be stacked two high in their unopened state. The storage area should be dry and stable. Any RAWMAT® HDB

Type P1 damaged during the delivery, storage or handling shall not be incorporated in

the works.

Once opened the rolls must be stored under cover or protected with weatherproof sheets to prevent rain damage and drying out. Any part used roll can be re-wrapped and

can be re-used if it has been protected in plastic to prevent moisture loss or saturation from rainfall.

DESPATCH QUANTITIES

RAWMAT® Type P 1 Roll = 1m x 5m = 5m2 - Average Weight = 44 kg Approximate Roll Dimensions = 210mm Diameter x 1,005mm Width

1 Pallet Box = 25 Rolls = 125m2 - Average Weight = 1,150kg Pallet Dimensions = 1,150mm x 1,150mm x 1,150mm

18 Pallet Boxes (2,250m2) capacity per 20 ft Container

20 Pallet Boxes (2,500m2) capacity per 40 ft Road Trailer/Container

* Weight restrictions vary from country to country due to legislation.

Please obtain confirmation from Rawell on territorial transport legislation.

RAWSEAL® TR 35 1 Box = 18 x 1m lengths = 18m - Weight = 24kg Box Dimensions = 135mm x 140mm x 1,030mm

1 Pallet = 56 Boxes = 1,008m - Weight = 1,350kg

Pallet Dimensions = 1,150mm x 1,150mm x 1,170mm

* Weight restrictions vary from country to country due to legislation. Please obtain confirmation from Rawell on territorial transport legislation.

CHARACTERISTICS

Roll Size: 1m x 5m Core Thickness: 4.6mm* (Average)

Unit Weight: 8.5kg/m2 ±10%

* When the material is measured no less than 5 times equidistantly over its entire width (cross directionally) no single reading should be <4.2mm

2. Apply Rawpaste mastic to bund

wall

5. White side up

4. Do not exceed 25kg per person

6. White side uppermost. Peel back overlaps, apply mastic

White Non-woven Geotextile

Plastic

Jan 2009