Characteristics and applications of HDPE rough surface  geomembrane

Performance characteristics and application of HDPE rough geomembrane

HDPE rough geomembrane is made of about 97.5% high quality polyethylene, 2.5% carbon black, trace amount of antioxidant and heat stabilizer. It has excellent temperature adaptability, weldability, weather resistance and good aging resistance, chemical resistance, environmental stress cracking resistance and anti-puncture performance.

Rough geomembrane is a kind of HDPE geomembrane with rough surface, rough geomembrane because of its unique rough texture, greatly strengthen the friction between the geomembrane and geotextile, it can be conveniently and quickly applied to the landfill, dam slope seepage control and other steep slope seepage control project. Rough geomembrane is divided into single rough geomembrane, double rough geomembrane, in addition there are column point rough geomembrane, also divided into column point single rough or column point double rough.   Single and double rough geomembrane is a HDPE geomembrane with uniformly rough appearance on one or both sides produced by special formulated virgin resin and special blow molding process. Columnar point rough geomembrane is a HDPE geomembrane with uniform columnar point appearance on one or both sides, produced by special flat extrusion process with specially formulated virgin resin.

First, the role of geomembrane

  1. Leakage prevention: the main role of geomembrane is leakage prevention, it can effectively prevent the infiltration of groundwater, rainwater, river water and other liquids.
  2. Reinforcement of dams: geomembrane can be used to reinforce dams and enhance the stability and safety of dams.
  3. Isolating soil: geomembrane can isolate soil and prevent the interaction between different soil layers.
  4. Enhancement of road surface: Geomembrane can be used in road surface construction to enhance the stability and bearing capacity of road surface.
  5. Prevent settlement: geomembrane can prevent settlement of buildings and improve the stability of buildings.

Landfill as an example, introduce the specific application of brown geomembrane: landfill, then, mainly three parts with geomembrane to do seepage control: the bottom of the bank, slope and cover (or called closure). Used in the “bottom” it is said to lay a layer at the bottom of the landfill, this is the level of seepage control, generally used is the smooth surface of the geomembrane; and used in the “slope”, that is, the landfill around the surrounding dams, it is necessary to use the brown surface of the geomembrane, because of the slope has a vertical angle, with the Rough surface geomembrane can increase the friction, to put it simply is to make geomembrane in the slope better “hang on”; finally used for covering, or sealing time, is to use the light surface membrane more, because sealing of the main is to play to prevent the rainwater into the reservoir area lead to leachate increase, so that the reservoir area of the garbage and the outside world to isolate the role of, but also It also belongs to horizontal seepage control.

What are the superior properties of rough HDPE geomembrane in engineering applications?  

1, large friction coefficient – rough HDPE geomembrane surface of small particles, increasing the coefficient of friction, but also increase the stability of the slope, so that the available volume of light surface HDPE geomembrane can carry to maximize.  

2, impermeability coefficient – rough HDPE geomembrane has ordinary waterproof material can not be compared with the permeability coefficient K <1.0 * 10-13g.cm/ccm2.s.pa.  

3, chemical stability – brown HDPE geomembrane has excellent chemical stability, widely used in sewage treatment, chemical reaction pools, landfills, high temperature, asphalt, oil and tar, acid, alkali, salt and other more than 80 kinds of strong acid and alkali chemical media corrosion.

 4, aging resistance – brown HDPE geomembrane has excellent anti-aging, anti-ultraviolet, anti-decomposition ability, can be used in the bare, the service life of the material up to 50-70 years, for the environment to prevent infiltration to provide a good guarantee.  5, anti-plant roots – brown HDPE geomembrane has excellent anti-puncture ability, can resist most of the plant roots. 

6, high mechanical strength – brown HDPE geomembrane has good mechanical strength excellent elasticity and deformation ability makes it very suitable for expansion or contraction of the substrate, can effectively customer service substrate uneven settlement, tensile strength at break 28MP, elongation at break 700%.  

7, construction degree fast – brown HDPE geomembrane has good flexibility, there are many specifications of a variety of laying form to meet the requirements of different projects seepage control, using hot melt welding, high welding strength, construction is convenient, fast.  8, environmental protection and non-toxic – brown HDPE geomembrane materials are non-toxic environmental protection materials, seepage control away from the ordinary physical changes, does not produce any harmful substances, is environmental protection, aquaculture, drinking water pool of the best choice.