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Retaining Wall Protection Drainage Sheet:

 
Retaining Wall Drainage System:
Drainage Sheet with Geotextile Filter Fabric
 
The High Compressive Strength Drainage Sheet For Underground Applications
Material: Dimpled sheet made of special high-density PE combined with a PP geotextile   
Compression strength:   250 kN/m2 approx., conforming with DIN 53454   
 
Dimple height: 10mm    
Drainage capacity:   1.2 l/sec. m approx. when compressed by 13% (corresponding to an installation depth of about 2.5 m)     

Roll size for 10mm: 1.22 m x 12.5 m, 2.44 m x 12.5 m
Colour: Black 
  
Drainage Sheet with Geotextile Filter Fabric:
 
is a protection and drainage system for compression-resistant surfaces.  
is a two-way dimpled sheet made from special high-density PE with a fused-on PP geotextile. A compact system that may be applied quickly straight from the roll.  
is made exclusively of branded polyethylene. Containing no recycled material, it is itself fully recyclable.  
resists degradation in soil and is non-polluting for drinking water.  
forms a system of ventilation ducts between the foundation wall and the dimples which keeps the wall dry and provides additional heat insulation.  
features a drainage capacity that can handle twice the maximum amount of water that is likely to occur under unfavourable soil conditions.  
is highly compression-resistant.      
 
Benefits:  

 

2 layers - one complete system:   
Layer 1: The two-way dimpled sheet. Featuring dimples on both sides, it offers two advantages: On the one hand, the dimples between the foundation wall and the sheet create a system of ventilation ducts which keeps the foundation wall permanently dry. On the other hand, the dimples that point towards the surrounding soil provide drainage across the entire surface.
Layer 2: The compression-resistant permanent geotextile made of PP. Laminated on to the dimpled sheet, the layer of rot-proof geotextile out fine-grained soil particles, thus protecting the system of ducts formed by the dimples from being clogged up by sludge. This permits water to flow unhindered downwards to the perforated drainage pipe.

Installation instructions:

 

  • Installed either vertically or horizontally.
  • Held in place by either taping, nailing, gluing or simply overhanging over the wall while backfilling takes place.
  • Installed with the geotextile facing the backfill.
  • Joined by simply butting edge to edge and overlapping the geotextile overhang and securing with reinforced canvas tape. Alternatively overlap the cuspate core by 50mm and secure geotextile as previous.
  • Backfill with free draining fill taking care not to disturb or damage the drainage sheet.  

HDPE core properties

Units

10mm

Geotextile Properties

Compressive strength

kN/m2

528

Flow

>200 i/m2/s

 

Mm

10.0

CBR

>1500 N

Thickness

i/min/m width

223

EOS

<0.12 mm

Roll length

m

12.5

Grab

>500 N

Roll width

m

1.22

 

 

Roll weight

Kg

18

 

 

 

Waterproofing Membrane Protection Drainage Sheet:

 
 
Drainage Sheet with Geotextile Filter Fabric
 

Provide effective drainage and waterproof membrane protection on:

 

  • Retaining and basement walls
  • Tunnels and landfills
  • Paved areas
  • Roof gardens and landscaped decks
  • Planter boxes 
Roll size for 8mm: 2m x 20m
Colour: Brown 
  
Drainage Sheet with Geotextile Filter Fabric:  

  • A horizontal 8 mm high dimple configuration
  • Compressive strength of 250 kN/m2 (25 t/m2) that permits usage in medium to high weight bearing load situations
  • An adhered 136 g/m2 geotextile
  • A 50 mm selvedge on one edge that allows easy joining of rolls
  • Dimpled configuration that allows efficient water capture and discharge rates
  • Resistance to biological attack and to a wide range of soil-borne chemicals 

Dimpled drainage sheets offer many advantages including:

  • Wide, lightweight rolls that allow rapid and low cost installation
  • Creation of efficient drainage and vapour barriers between diaphragm and internal walls
  • Resistance to puncturing when installed as a vapour and drainage barrier under concrete slabs
  • Replacement of lean concrete sub-base slabs without compromising load-bearing capacity
  • Creation of a cavity control layer in chemical storage areas
  • Acting as a protection layer over waterproofing membranes .  

Material    

High density polyethylene    

Weight    

approx. 775 g/m2    

Sheet thickness    

approx. 0.6 mm    

Dimple height    

8 mm    

Void volume between studs    

approx. 5.3 L/m2    

Discharge Capacity    

approx. 4.6 Ls.m  

Geotextile weight    

136 g/m2    

Geotextile water transmission
Resistance    

approx. 100 L/s.m2    

Compressive strength    

approx. 250 kN/m2 (25 t/m2)    

Service temperature    

-30oC to 80oC    

Biological / chemical resistance   

Resistant to ground chemicals, rot, mould, algae, bacteria and root penetration. Resistant to fire:  B2 (DIN 4102)    

Roll Size    

2.0m x 20m

 

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