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Edited by Lucia-Haoyang Environmental Co.,Ltd
I. Introduction
In the field of geomembrane applications, understanding the characteristics, similarities, differences, advantages, disadvantages, and costs of various materials is crucial for making informed decisions. This article, provides a comprehensive comparison of HDPE (High-Density Polyethylene), EPDM (Ethylene Propylene Diene Monomer Rubber), PVC (Polyvinyl Chloride), and EVA (Ethylene Vinyl Acetate) geomembranes, with a focus on their properties, costs, and selection criteria for different scenarios.
II. Properties Comparison
1. Chemical Resistance
The chemical resistance of geomembranes is vital for their long - term performance in different environments. The following table shows how HDPE, EPDM, PVC, and EVA perform against acids, alkalis, and organic solvents.
Geomembrane Type | Acid Resistance | Alkali Resistance | Organic Solvent Resistance |
HDPE | Excellent | Excellent | Good |
EPDM | Good | Good | Fair |
PVC | Fair | Good | Fair |
EVA | Good | Good | Poor |
Among them, HDPE shows outstanding performance in withstanding acids and alkalis, making it suitable for chemically - harsh environments.
2. Mechanical Strength
Mechanical strength determines the durability and ability of geomembranes to withstand external forces.
Geomembrane Type | Tensile Strength (MPa) | Elongation at Break (%) | Puncture Resistance (N) |
HDPE | 20 - 30 | 600 - 800 | 1000 - 1500 |
EPDM | 10 - 15 | 500 - 700 | 800 - 1200 |
PVC | 15 - 20 | 300 - 500 | 900 - 1300 |
EVA | 8 - 12 | 400 - 600 | 700 - 1000 |
HDPE has a relatively high tensile strength and good puncture resistance, which is beneficial for projects where the geomembrane needs to withstand external forces.
3. Thermal Stability
Thermal stability affects the applicable temperature range of geomembranes.
Geomembrane Type | Melting Point (°C) | Service Temperature Range (°C) |
HDPE | 120 - 130 | - 70 - 100 |
EPDM | N/A (does not melt but degrades) | - 50 - 150 |
PVC | 160 - 210 | - 15 - 60 |
EVA | 90 - 100 | - 40 - 80 |
EPDM has a wide service temperature range, while HDPE also offers a relatively broad range suitable for many applications.
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III. Cost Analysis
1. Material Cost
Geomembrane Type | Price Range (CNY/m²) | Remarks |
HDPE | 20 - 50 | Due to production processes and raw materials |
EPDM | 10 - 30 | Price for ordinary quality, high - end may vary |
PVC | 15 - 35 | High cost - performance ratio among these types |
EVA | 18 - 45 | Similar or slightly lower than EPDM |
In general, HDPE offers a good balance between cost and performance in terms of material cost.
2. Welding Cost
Welding cost is related to the welding method and the requirements for equipment and labor.
Geomembrane Type | Welding Method | Cost Characteristics |
HDPE | Hot - air Welding | High requirements for equipment and technology |
EPDM | Hot - wedge Welding, High - frequency Welding, etc. | Mature technology, but equipment and labor costs involved |
PVC | Hot - melt Welding | Fast welding speed, relatively low equipment and labor costs |
EVA | Hot - melt Welding, etc. | High requirements for welding environment and technology |
HDPE has an edge in welding cost due to its relatively simple and efficient welding method.
3. Laying Cost
Geomembrane Type | Laying Characteristics |
HDPE | High requirements for the base layer, need to ensure flatness and cleanliness to avoid scratches |
EPDM | Light - weight, convenient for laying, but more labor and time are required for complex terrains |
PVC | High - efficiency for large - area laying, but high requirements for site flatness |
EVA | Light - weight, wide width, easy for laying and processing |
Each type has its own laying requirements, and project conditions need to be considered for cost - effective laying.
4. Maintenance Cost
Geomembrane Type | Aging Resistance and Repair Characteristics |
HDPE | Good aging and weather resistance, but difficult to repair when damaged |
EPDM | Performance may be affected by plasticizer migration, regular inspection is required |
PVC | Strong chemical stability and anti - aging property, easy to repair |
EVA | Good weather resistance, slightly high repair cost for external force damage |
HDPE's good anti - aging and easy - repair features contribute to its relatively low maintenance cost.
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IV. Application Scenarios of Different Geomembranes
1. Landfills
l HDPE Geomembranes: The primary choice, given their high anti - seepage performance, robust chemical stability, and high strength. These properties enable them to effectively prevent leachate leakage and endure the pressure exerted by the accumulated garbage.
l EPDM Geomembranes: Can be considered as an alternative in regions with harsh weather conditions and intense UV radiation. However, their relatively high cost may pose a constraint to their widespread adoption.
2. Water Conservancy Projects
l HDPE Geomembranes: Widely utilized due to their excellent anti - seepage and chemical stability characteristics. They are highly suitable for applications such as reservoirs and canals.
l PVC Geomembranes: Can be employed in small - scale water conservancy projects or in scenarios where some degree of flexibility is required, such as small ponds and artificial lakes. This is attributed to their relatively low cost and certain flexibility.
3. Artificial Wetlands
l HDPE Geomembranes: Provide reliable anti - seepage capabilities, effectively preventing sewage leakage and safeguarding groundwater quality.
l EVA Geomembranes: Their flexibility and anti - root - penetration performance can be advantageous in certain artificial wetlands with specific requirements for plant root resistance.
4. Tunnel Projects
l EVA Geomembranes: Their outstanding flexibility makes them the preferred option for tunnel projects, as they can adapt well to the complex shapes and structures inherent in tunnels.
l HDPE Geomembranes: Can also be used in large - scale tunnels where high anti - seepage and structural stability are of utmost importance.
5. Aquaculture
l HDPE Geomembranes: Ensure a stable water environment by preventing water leakage and shielding against soil contaminants. Their good anti - aging performance also makes them suitable for long - term use.
l PVC Geomembranes: Suitable for small - scale aquaculture farms or cost - sensitive projects, thanks to their relatively low cost and ease of cleaning.
6. Landscaping
l HDPE Geomembranes: Employed in artificial lakes and water features to prevent water leakage and maintain water quality, with good anti - puncture performance.
l EPDM Geomembranes: Their good weather resistance and environmental protection performance can be a distinct advantage in high - end landscaping projects. Additionally, their color options can blend harmoniously with the surrounding environment.
V. Advantages of HDPE Geomembranes
1. Superior Chemical Resistance: HDPE can resist a wide range of chemicals, ensuring its long - term stability in chemically - aggressive environments.
2. High Mechanical Strength: With high tensile strength and puncture resistance, it can withstand various external forces during construction and service life.
3. Cost - Effectiveness: As shown in the cost analysis, HDPE has relatively lower costs in material, welding, laying, and maintenance, providing a cost - efficient solution for projects.
4. Wide Application Range: Suitable for various projects such as landfills, reservoirs, and aquaculture ponds due to its excellent comprehensive properties.
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VI. Why choose HAOYANG HDPE Geomembranes
1. Advanced Production Technology: Haoyang uses state - of - the - art production technology to ensure the high quality of its HDPE geomembranes. The products have consistent thickness and excellent performance stability.
2. Strict Quality Control: Stringent quality control measures are implemented throughout the production process. Each batch of products undergoes multiple tests to ensure that they meet or exceed industry standards.
3. Customization Services: Haoyang can provide customized HDPE geomembranes according to different project requirements, such as different thicknesses, widths, and physical properties, to better meet the needs of customers.
4. Excellent After - sales Service: The company offers professional after - sales service teams. They can provide on - site technical support, answer customer questions in a timely manner, and ensure the smooth progress of projects.
In conclusion, when considering the selection of geomembranes, HDPE geomembranes generally have significant advantages in terms of properties and costs. And Haoyang Environmental Co., Ltd.'s HDPE geomembranes, with their unique advantages, are an ideal choice for a wide range of engineering projects.
1.5mm geomemrbane test report.pdf
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