Self-adhesive HDPE Waterproofing Membrane Sheet

Self-adhesive HDPE Waterproofing Membrane Sheet

1. Product Overview The HDPE self adhesive waterproofing membrane sheet consists of an HDPE membrane as base material, a polymer adhesive layer and a protective layer(PE membrane or mineral grain, sand). It is specially designed for underground construction and tunnel engineering use, taking...

Product Details

Self-adhesive HDPE Waterproofing Membrane Sheet

image004.jpg

1. Product Overview
The HDPE self adhesive waterproofing  membrane sheet consists of an HDPE membrane as base material, a polymer  adhesive layer and a protective layer(PE membrane or mineral grain, sand). It  is specially designed for underground construction and tunnel engineering use,  taking advantage of its strong reactive bonding ability with post-poured  concrete.


2.Product categories 


Categories

Introduction

Standard

Item NO.

 


          

Sand    finish

This product has a sand finish to protect the    self-adhesive layer, which makes it ready for workers to work on top and    provides perfect bonding with post-poured concrete.

 

GB/T23457-2009

 

DYP-811

 

    PE    finish

This product has a peelable isolating PE film over    the self-adhesive layer. And it is mainly used on walls or as sealing tape to    seal the butt joint of the Sand finish type membrane.

 

GB/T23457-2009

 

DYP-812


image006.pngimage008.png  

Sand  finish HDPE self-adhesive membrane structure           PE finish HDPE self-adhesive  membrane structure


3. Product Specification

Thickness/mm

1.2

1.5

1.7

2.0

Top surface

PE/Sand/Mineral Grain
       PE/S
       PE/S

Interlayer

reactive adhesive

Bottom surface

HDPE sheet
       HDPE/EVA
       HDPE/EVA

Width/m

2
       2000
       2000

Length/m

20

20

20

15

 

4. Product Features
1. Unique formula & perfect  waterproofing: The combination of special  non-asphaltic reactive adhesive and polymer sheet  makes this material possesses advantages like high tensile strength, impact  resistance, puncture resistance,  self-adhesive  and easy construction.

2.Skin  tight structure resists "water breakthrough": The strong chemical bonding between product and post-poured  concrete  forms a skin tight waterproof structure , so that when a partial perforation or  breakage occurs, water breakthrough  is well resisted.

3.Anti-sedimentation  and anti-cracking: Due to the special pre-paving  & inverted bonding construction method, product has  no structural bonding to the substrate, so that waterproof layer's integrity is  well guaranteed even if sedimentation occurs  to substrate after construction.

4.Impact  resistance and puncture resistance: The polymer  sheet's excellent property can well support the construction load  and impact of post-poured concrete, making it the perfect material for such  type of construction.

5.Low  requirement for the substrate surface preparation, saving construction time  & cost: Due to the pre-paving &inverted  bonding construction, substrate needs little leveling, damp is acceptable,  construction is less susceptible to weather,  and no protective layer is required.

 6) Cold application, no heat no flame: The strong adhesive ensures excellent lap bonding, thus no hot gas  welding is
 needed.
 7) Bacterium resistant & mould  resistant: Theoretically this product has a  durability of 100 years in underground use.
 8) Safe & Eco-friendly: Substrate surface needs no special treatment, construction  procedures requires no solvent, no fuel of  any kind and no hot gas welding also.

 

5. Application Scope

1) Transportation system: railway, subway,  highway & tunnels waterproof;
 2) Underground project: building basement  & air-defense construction waterproof;
 3) Environmental engineering: refuse  landfill, wastewater treatment plant & chemical pool;
 4) Water conservancy project: reservoir,  dam, water channel & artificial lake.
  

image010.png

 

 

6. Construction Method

For tunnel
 1)  Method:
 Highway, railway and high-speed railway  tunnels waterproof work adopt pre-paving & inverted bonding application.  This pre-paving application method is to pre-pave the DCPS membrane(with the  HDPE/EVA side facing the substrate) over the entire substrate of the first  concrete lining, mechanically fix the DCPS membrane onto the substrate, then  execute the second concrete lining over the entire DCPS membrane(the sand  side). Later on, chemical cross-linking reactions will take place between the  polymer self-adhesive material from the DCPS membrane and the fresh concrete,  forming a tight and sturdy bonding between the concrete structure and the DCPS  waterproof membrane, providing superior waterproof performance.

2)  Process:
 Tunnel arch crown – snap lines – install  upholder(hanging nails) – pave DCPS membrane – mechanically fix DCPS  membrane(tie hanging tapes) – overlapping DCPS membrane – joint sealing - reinforcement  assembling – concrete lining.

For underground project
 1)  Method:
 Subway and building basement waterproof  work adopt pre-paving & inverted bonding application. This application  method is to pre-pave the DCPS membrane(with the HDPE/EVA side facing the  substrate) over the entire level substrate surface or vertical retaining  structure surface, fix the DCPS membrane onto the surface accordingly, then  execute the concrete lining over the entire DCPS membrane surface(the sand  side). Later on, chemical cross-linking reactions will take place between the  polymer self-adhesive material from the DCPS membrane and the fresh concrete,  forming a tight and sturdy bonding between the concrete structure and the DCPS  waterproof membrane, providing superior waterproof performance.

2)  Process:
 Level  surface: substrate cleaning – snap lines – pave  DCPS membrane – overlapping DCPS membrane – joint sealing – reinforcement assembling  – concrete lining.

Vertical  surface: substrate cleaning – snap lines – pave  DCPS membrane – mechanically fix DCPS membrane – overlapping DCPS membrane - reinforcement  assembling - concrete lining.


image012.png

 

7. Executive Standard & Performance  Index

Executive standard: GB/T23457-2009  Pre-paving/Wet-paving Waterproof Membrane

1

Item

Index

2

Tensile

Tensile strength/(N/50mm) ≥

500

3

Membrane    elongation at break/% ≥

400

4

Nail tear resistance/N  ≥

400

5

Impact

Dia(10±0.1)mm, no leakage

6

Static load

20kg, no leakage

7

Heat resistance

70℃, 2h, No displacement, flow or dripping

8

Low-temp bending

-23℃, no cracking

9

Anti-watermoving between layers

0.6Mpa, no water running

10

Peel strength with post-poured    concrete/(N/mm) ≥

No treatment

2.0

11

Cement powder contaminated surface

1.5

12

Sediment contaminated surface

1.5

13

Ultraviolet radiation aging

1.5

14

Thermal ageing

1.5

15

After immersed in water

1.5

16

Lap joint shear strength/(N/mm) ≥

1.8

17

Thermal ageing (70℃, 168h)

Tension retain/% ≥

90

18

Elongation retain/% ≥

80

19

Low-temp bending

-23℃, no cracking

20

Thermal stability

Appearance

No wrinkles, sliding or flowing

21

Dimensional change/% ≤

2.0


7. Package & Storage

1) Product is packed in rolls and wrapped  by plastic membrane.
 2) Store the product in a dry, ventilated  and cool place. Prevent the product from insolation and rain.
 3) Place the product flat-wise, with  stacking height less than 5 layers. Any incline or crossover should be  prevented.
 4) Under normal storage condition, product  shelf life is one year.

 

8. Project Cases

Tunnels:


image014.png

image016.png

image020.png

image018.png


Basement:

image024.png

image022.png

   


Inquiry