In the field of civil engineering and environmental protection,geomembranes are used in a very significant manner on most projects. Among the best-selling geomembranes, there are high density polyethylene geomembrane,linear low-density polyethylene geomembrane and ethylene-vinyl acetate geomembrane with some unique characteristics suitable for application on various occasions. Here, let us inform you about the difference between the three.
HDPE Geomembranes: Commercial and Environmental Applications
HDPE geomembranes are dense and have good chemical resistance. They have a molecular structure that is tightly packed, thereby imparting excellent strength and durability. HDPE geomembranes are utilized as the material of choice in industrial uses, for instance, chemical waste storage ponds. Chemical waste may be made up of different corrosive substances. HDPE geomembranes can tolerate extreme chemical conditions and prevent dangerous chemicals from seeping into the ground and groundwater. For example, acidic and alkaline waste liquid storage ponds in large chemical plants are lined with HDPE geomembranes. These geomembranes are not only safe for storing waste, but they also possess a very long lifespan, or they will not have to be replaced frequently.
HDPE geomembranes are employed widely in environmental use such as landfills as well. They are employed as a protective layer between waste and the environment. Since HDPE geomembranes have good impermeability, leachate (fluids formed through the decomposition of waste) cannot contaminate soil and water resources. In new landfills, a number of layers of HDPE geomembranes are employed along with other substances to create a full closed system. This is intended to protect the environment and comply with tough environmental regulations.
LLDPE geomembranes: Agriculture and aquaculture applications
LLDPE geomembranes are extremely flexible and have good tensile strength. Such properties make them especially useful where there may be some movement or deformation of the substrate. LLDPE geomembranes are often used in irrigation channels in the agricultural sector. Irrigation channels need to allow for natural settlement of the soil over a period of time. The capacity of LLDPE geomembranes to absorb channel shape change without cracking or tearing allows them to adapt to any change in shape to provide a sustained and smooth flow of water for irrigation. For example, at a large-scale irrigation project in an area where soil is soft, LLDPE geomembranes were utilized in the channels. They may withstand small ground displacements resulting from water pressure and soil compaction without undermining the integrity of the channel lining.
LLDPE geomembranes are also extensively applied in aquaculture, such as fish ponds and shrimp ponds. They can also be installed in ponds with irregular shapes with ease. The high tensile strength of LLDPE geomembranes can withstand the pressure of water and aquatic animal activities. Furthermore, LLDPE geomembranes are resistant to biodegradation, which is extremely important in microorganism-rich aquatic environments. They help to offer a clean, controlled environment for shrimp and fish to grow, preventing the intrusion of water and outside impurities.
EVA geomembranes: Water conservancy and landscape projects
EVA geomembranes have particular properties, including excellent flexibility, excellent low-temperature resistance, and fine adhesion. In water conservancy construction, for instance, small-scale and medium-scale reservoirs and irrigation ditches in cold climates, EVA geomembranes are typically used. EVA geomembranes can be flexible and whole with excellent low-temperature resistance in cold climates. This is significant as water in ditches and reservoirs will ice up during winter, and geomembranes need to withstand thermal expansion and shrinkage caused by temperature change. For example, for a reservoir in mountains that experiences cold winters, EVA geomembranes are used as lining materials in the bottom and slopes of a reservoir. They can adapt to temperature change and prevent seepage of water, ensuring a normal working status of the reservoir.
In landscaped construction, EVA geomembranes are used to build ornamental waterscapes and artificial lakes. Its improved adhesion makes easy integration with other materials like soil and rocks. This makes it easy to build strong and beautiful water retaining structures. An artificial lake was built in a city park using EVA geomembranes. Geomembranes not only keep the water out, but they also provide a smooth surface upon which underwater plants and other ornaments may be installed, thus enhancing the appearance of the landscape at large.
In short, HDPE, LLDPE and EVA geomembranes have their own characteristics and thus apply to various application conditions. For project managers, these distinctions are crucial to the choice of the most appropriate geomembrane for a project, in order to ensure the success and long-term operation of the project. Our company is a wholesale geomembrane supplier, offering high quality and competitive products. welcome to inquire.