HDPE Geomembrane Specification
Tested Property |
Test Method |
Frequency |
Minimum Average Value |
Thickness, (minimum average) mm |
ASTM D 5199 |
every roll |
0.75 |
1.0 |
1.5 |
2.0 |
2.5 |
3.0 |
Density, g/cm3 |
ASTM D 1505 |
every 5th roll |
0.94 |
0.94 |
0.94 |
0.94 |
0.94 |
0.94 |
Tensile Properties (each direction): |
|
Strength at Break, N/mm-width |
ASTM D 6693, Type IV |
every 5th roll |
21 |
28 |
43 |
57 |
71 |
85 |
Strength at Yield, N/mm-width |
11 |
15 |
23 |
30 |
38 |
45 |
Elongation at Break, % |
G.L. 51 mm (2.0 in) |
|
700 |
700 |
700 |
700 |
700 |
700 |
Elongation at Yield, % |
G.L. 33 mm (1.3 in) |
|
13 |
13 |
13 |
13 |
13 |
13 |
Tear Resistance, N (lb) |
ASTM D 1004 |
every 5th roll |
93 (21) |
125 (28) |
187 (42) |
249 (56) |
311 (70) |
373 (84) |
Puncture Resistance, N (lb) |
ASTM D 4833 |
every 5th roll |
263(59) |
352(79) |
530(119) |
703(158) |
881(198) |
1,059 (238) |
Carbon Black Content, % |
ASTM D 1603 / D 4218 |
every 5th roll |
2.0-3.0 |
2.0-3.0 |
2.0-3.0 |
2.0-3.0 |
2.0-3.0 |
2.0-3.0 |
Notched Constant Tensile Load, hrs |
ASTM D 5397, Appendix |
90,000 kg |
400 |
400 |
400 |
400 |
400 |
400 |
Oxidative Induction Time, minutes |
ASTM D 3895, 200° C; O2, 1 atm |
90,000 kg |
>100 |
>100 |
>100 |
>100 |
>100 |
>100 |
TYPICAL ROLL DIMENSIONS |
|
|
|
Roll Length, m |
280 |
210 |
140 |
105 |
85 |
70 |
Roll Width, m |
7.0/8.0 |
7.0/8.0 |
7.0/8.0 |
7.0/8.0 |
7.0 |
7.0 |
The type and thickness of material in dam liners vary. The main determinants of the type of material to be used are:
size of the dam or pond
exposure to UV
required dam liner life
preparation and nature of the base of the dam
available budget for the dam liners
Liquids that are contained may be drinking water, industrial process waste such as dunder or mine washings, sewerage or molasses.
The subgrade that is to receive the liner requires careful preparation. The subgrade preparation is required to meet the specification of the liner manufacturers. Failure to meet these requirements may result in the invalidation of any offered guarantees. Typically the embankments are required to be regular and free from sharp or large rocks. Material placed in contact with the liner is required to be less than 10mm in size. Where granular material forms the subgrade it is usual to place a geotextile under the layer. The geotextile used is usually a needle punched, non-woven material with a weight of not less than 250gms/m2.
Where ponds are to be constructed in areas where there is vertical gas movement through the subgrade of the pond then it is required to provide a subgrade venting system to prevent gas from collecting below the dam liners. Vertical gas movement may be produced by the movement of the water table over a seasonal or diurnal period or by the degrading of vegetation matter at depth. The venting system usually consists of a full geotextile layer underlayed by a herringbone system of slotted pipe or slot drain wrapped in geotextile. The venting system may fulfil a dual role. The system can double up as a leak detection system and can also be used to monitor the level of the groundwater before the level of the contained liquid is reduced to minimum levels.
Lining materials for ponds include HDPE, Polypropylene, Elvaloys and PVC.
The most widely used lining systems are HDPE, which is produced in various thicknesses and textures. HDPE is delivered in 7m rolls weighing approximately 1.6 tonnes. The material is unrolled and welded on-site with wedge and extrusion welding equipment.
Lining systems are anchored at the perimeter of the pond by either burying the upper edge or by fixing the perimeter to a concrete anchor beam.
HDPE Geomembrane Packing and Delivery
1. The products are usually tied with packing tape.The packaging size and container capacity of the product are different from the product specifications
2. Container transportation, according to your project request.
3. Port: Qingdao, China.
Tai'an City RuiHeng Building Materials Co., Ltd is specialized in the research, development, production and sales of geosynthetic materials, plastic products and plastic machinery. Our company is devoted to geosynthetic material research and development and application.
Our main products are hdpe geomembrane liner,plastic geogrid, geotextile,3D geomat,geocell,geomembrane welding machine,extrusion welder and welding rod,etc. Our products have been widely used by clients in more than 20 countries and regions. Our products are applied in aquaculture, railways, highways, water conservancy, electric power, metallurgy, ports and municipal engineering construction. We have won the praises of customers.
1. How long does an HDPE liner typically last?
An HDPE liner can last for up to 50 years or more, depending on the application and environmental factors.
2. What is the installation process for an HDPE liner?
The installation process for an HDPE liner typically involves excavating the area where the liner will be installed, laying down a layer of geotextile fabric, and then placing the HDPE liner on top. The edges of the liner are then anchored to prevent movement.
3. Can an HDPE liner be used for potable water storage?
While HDPE liners are commonly used for storing water, they are not typically used for potable (drinking) water storage. Specialized liners are required for potable water storage to ensure that the water remains safe to drink.
4. What is the cost of an HDPE liner?
The cost of an HDPE liner varies depending on its thickness, size, and other factors. However, HDPE liners are generally considered a cost-effective option compared to other types of liners.
5. What are the specifications for HDPE geomembrane used in gold mining heap leaching liner?
The specifications for HDPE geomembrane used in gold mining heap leaching liner vary depending on the specific application, but typically include thickness, permeability, and chemical resistance.