HDPE Geomembrane for Environmental Projects water conservancy projects landfill mining canal
The manufacturing of geomembranes begins with the production of the raw materials, which include the polymer resin, and various additives such as antioxidants, plasticizers, fillers, carbon black, and lubricants (as a processing aid). These raw materials (i.e., the "formulation") are then processed into sheets of various widths and thickness by extrusion, calendering, and/or spread coating.
The US market is currently divided between HDPE, LLDPE, fPP, PVC, CSPE-R, EPDM-R and others (such as EIA-R), and can be summarized as follows:[citation needed] (Note that M m2 refers to millions of square meters.)
high-density polyethylene (HDPE) ~ 35% or 105 M m2
linear low-density polyethylene (LLDPE) ~ 25% or 75 M m2
polyvinyl chloride (PVC) ~ 25% or 75 M m2
flexible polypropylene (fPP) ~ 10% or 30 M m2
chlorosulfonated polyethylene (CSPE) ~ 2% or 6 M m2
ethylene propylene diene terpolymer (EPDM) ~ 3% or 9 M m2
The majority of generic geomembrane test methods that are referenced worldwide are by the ASTM International|American Society of Testing and Materials (ASTM) due to their long history in this activity. More recent are test method developed by the International Organization for Standardization (ISO). Lastly, the Geosynthetic Research Institute (GRI) has developed test methods that are only for test methods not addressed by ASTM or ISO. Of course, individual countries and manufacturers often have specific (and sometimes) proprietary test methods.
Made from special virgin resin by blow film process
Specification of HDPE Geomembrane for Environmental Projects water conservancy projects landfill mining canal:
I. Thickness: 0.3mm-3. Omm
2.4m-9m in roll width, the length as client ' s request
Property of HDPE Geomembrane for Environmental Projects water conservancy projects landfill mining canal:
I. Good flexibility
2. For service temperature range: -700C-+1IOoC
3. Corrosion resistance, aging resistance
4. Excellent environmental stress cracking resistance property
5. High tensile strength and elongation
Application of HDPE Geomembrane for Environmental Projects water conservancy projects landfill mining canal:
I. Municipal environmental projects, water conservancy projects
2. Landfill cap(closures), mining heap leach pads
3. Pond liner, canal linings, tank linings, raw water treatment reservoirs, retention ponds
4. Waste water treatment lagoon, secondary containment
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| No. | Item | Test Value |
| 0.75mm | 1.0 mm | 1.25 mm | 1.5 mm | 2.0 mm | 2.5 mm | 3.0mm |
| 1 | Minimum Density(g/cm³) | 0.939 |
| 2 | Tensile Property |
| Strength at yield,N/mm | 11 | 15 | 18 | 22 | 29 | 37 | 44 |
| Strength at break ,N/mm | 20 | 27 | 33 | 40 | 53 | 67 | 80 |
| Elongation at yield,% | 12 |
| Elongation at break,% | 700 |
| 3 | Tear Resistance N | 93 | 125 | 156 | 187 | 249 | 311 | 374 |
| 4 | Puncture Resistance N | 240 | 320 | 400 | 480 | 640 | 800 | 960 |
| 5 | Stress Crack Resistance, hrs | 300 |
| 6 | Carbon Black Content, % | 2.0-3.0 |
| Carbon Black Dispersion | 1 or 2 |
| 7 | Standard OTI Min | 100 |
| High Pressure OTI Min | 400 |
| 8 | Impact Cold Crack at -70°C | Pass |
| 9 | Water vapor permeability | ≤1.0×10-13 |
| (gNaN/cm2 .s.Pa) |
| 10 | Dimensional Stability (%) | ±2 |
Production standard:
I. GB/T17643-2011
2. CJ/T234-2006
3. GRI-GM13
Physical Properties
The main physical properties of geomembranes in the as-manufactured state are:
Thickness (smooth sheet, textured, asperity height)
Density
Melt flow index
Mass per unit area (weight)
Vapor transmission (water and solvent).
Mechanical Properties
There are a number of mechanical tests that have been developed to determine the strength of polymeric sheet materials. Many have been adopted for use in evaluating geomembranes. They represent both quality control and design, i.e., index versus performance tests.
tensile strength and elongation (index, wide width, axisymmetric, and seams)
tear resistance
impact resistance
puncture resistance
interface shear strength
anchorage strength
stress cracking (constant load and single point).
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| No. | Item | Test Value |
| 0.75mm | 1.0 mm | 1.25 mm | 1.5 mm | 2.0 mm | 2.5 mm | 3.0mm |
| 1 | Minimum Density(g/cm³) | 0.939 |
| 2 | Tensile Property |
| Strength at yield,N/mm | 11 | 15 | 18 | 22 | 29 | 37 | 44 |
| Strength at break ,N/mm | 20 | 27 | 33 | 40 | 53 | 67 | 80 |
| Elongation at yield,% | 12 |
| Elongation at break,% | 700 |
| 3 | Tear Resistance N | 93 | 125 | 156 | 187 | 249 | 311 | 374 |
| 4 | Puncture Resistance N | 240 | 320 | 400 | 480 | 640 | 800 | 960 |
| 5 | Stress Crack Resistance, hrs | 300 |
| 6 | Carbon Black Content, % | 2.0-3.0 |
| Carbon Black Dispersion | 1 or 2 |
| 7 | Standard OTI Min | 100 |
| High Pressure OTI Min | 400 |
| 8 | Impact Cold Crack at -70°C | Pass |
| 9 | Water vapor permeability | ≤1.0×10-13 |
| (gNaN/cm2 .s.Pa) |
| 10 | Dimensional Stability (%) | ±2 |
FAQ
What is geosynthetics ?
Geosynthetics form a perfect erosion control fabric used extremely widely in civil engineering to stabilize and reinforce slopes and soil under or next to roads, railways, dams, water reservoirs etc.. They can be easily applied which minimizes the time of construction, as well as they limit the resources and materials necessary.
What kinds of geosynthetics we have ?
Non-woven geotextile, geogrids, geocells, GCL, Geomembranes, Geonets, Geocomposites etc .
What is the geosynthetics used for ?
Hydraulic
Lagooning and Water Treatment, Ornamental Ponds, Golf Courses
Aquaculture and Desalination,Water Lagoons,Tanks, Reservoirs, Liquid Waste,Floating Cover Solutions, Drainage and Filtration
Environment
Tailing ponds, Leach mining,Landfills,Landfill Capping,Protection against corrosion,Vertical Barriers
Civil Works
Erosion Control,Secondary Containment,Tunnels,Linear and Surface Works,Consolidation of Margins,Soil Reinforcement,Soil Separation.
Building - Parkings,Roofing,Soundproofing
Area |
Application of Geosynthetics |
| Hydraulic | Lagooning and Water Treatment, Ornamental Ponds, Golf Courses Aquaculture and Desalination Water LagoonsTanks, Reservoirs, Liquid WasteFloating Cover SolutionsDrainage and FiltrationShading Cover Solutions |
| Environment | Tailing ponds, Leach mining,Landfills,Landfill Capping,Protection against corrosion,Vertical Barriers |
| Civil Works | Erosion Control, Secondary Containment, Tunnels,Linear and Surface Works,Consolidation of Margins,Soil Reinforcement,Soil Separation. |
| Building | Parkings,Roofing,Soundproofing building |
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