Case Study
- Location: Indonesia
- Product: HDPE Impermeable Membrane
- Application: Phosphogypsum Slag Field Backwater Pumped Storage Power Station
Issue
The project is located at the phosphogypsum slag yard in Indonesia. This project is a supporting project in the local key mine reconstruction project. Located in the ditch of the slag yard, the east and west walls are leveled with concrete after cutting the slope according to the design of the mountain, and the north and south sides are piled and rolled to form a dam. The entire backwater pool is divided into two pools, large and small, and the middle is separated by a masonry concrete retaining wall. Except for the slope of the downstream rockfill dam, which is 1:2, the other slopes are all 1:1, and the middle retaining wall is 1:0.2. About 5m. The design is based on the requirements of environmental protection, and a polyethylene geomembrane with a thickness of 1.5mm is selected as the inner lining of the return pool after the comparison of the schemes. They are all laid directly on the concrete panel to prevent the acid waste liquid in the pool from seeping into the ground and polluting the surrounding environment. In this regard, during the construction period, it is necessary to choose a reasonable isolation and anti-seepage method, and improve the anti-seepage construction work. Geomembrane manufacturers must ensure that the product has good isolation and anti-seepage performance.
Solution
The impermeable membrane lining is not covered with any protective layer, and is directly exposed to the natural environment, and the use conditions are relatively harsh. The shape of the backwater pool is complex, and the environmental quality standard is high. It is required to store 100% of the waste liquid without leakage, which makes the construction more difficult. However, the technicians overcome various difficulties and actively cooperate with the owner. The designers put forward physical and chemical suggestions during the construction to improve the construction. Technology, strengthen quality inspection, and finally completed the project with quality and quantity.
As a geotechnical anti-seepage material, impermeable membrane has good ductility and strong adaptability. If the soil foundation or large deformed rockfill is used as the anti-seepage structure foundation, the application of geomembrane can better adapt to the deformation of the foundation. At the same time, the construction of impermeable membrane is relatively simple, and the requirements for equipment investment are not high. Convenience and relatively short construction period. At the same time, from an economic point of view, the investment per unit area is small, and the overall cost is low, especially compared with the asphalt concrete anti-seepage scheme, the economic advantage is obvious.
The quality of the construction site meets the design requirements, including that the surface of the base layer should be dry, dense, smooth, and free from cracks, sharp peaks, and unevenness. The model size of the impermeable membrane is the aspect that the customer needs to determine when placing an order. Due to different specifications and sizes, quotations may vary.
Benefits
The main features and benefits of geomembranes are:
- High strength. The yield tensile strength of impermeable membrane can reach 18MPa, the fracture tensile strength can reach 35MPa, the peel strength is 31kN/m, and the shear strength is 33kN/m; the ductility is good. The yield elongation rate is 13% to 16%, and the fracture elongation rate is 700% to 800%. It has good surface compliance and weather resistance. When it is actually damaged, the strain is as high as 1000%.
- Good anti-seepage ability. The anti-seepage coefficient of impermeable membrane is less than 1×10-13cm/s, which can ensure that the leachate will not leak due to the liner, pollute the land, rainwater will not pass through the cover layer of the closed site, increase the amount of leachate, and landfill gas will not pass through the liner Pad and leak out.
- Good chemical stability. Because the temperature of the landfill can reach 50°C, chemical stability is the most critical factor in the landfill design process. HDPE geomembrane is the most chemically stable material among all geomembrane materials. The chemical composition of the leachate of municipal solid waste sanitary landfill does not pose a threat to HDPE impermeable membrane, and HDPE geomembrane has good corrosion resistance.
- The softening point of HDPE impermeable membrane is about 121°C, and the cold embrittlement point is about -120°C. It has strong resistance to organic acids, inorganic salts, alcohols, aldehydes, amines, esters, and oils, and can prevent direct corrosion of these chemicals, and can also prevent performance decline due to absorption and expansion. Some hydrocarbons (such as benzene, phenylacetaldehyde, hexane, and benzene) also have certain resistance, and only the resistance to halogenated hydrocarbons (such as chlorinated benzaldehyde, bromobenzene) is poor.
Summary
Impermeable membrane is used in a wide variety of industries including waste, water, aquaculture, mining, power plants, industrial and civil engineering. Geomembrane products under the BPM brand are made of the highest quality High Density Polyethylene (HDPE) and specially formulated virgin polyethylene resin using state-of-the-art automatic production lines and advanced pressing technology.
BPM geomembrane includes smooth geomembrane HDPE liner, textured HDPE geomembrane, composite geomembrane liner and geomembrane, etc. The smooth geomembrane HDPE liner is available in black, white and green. Textured geomembranes can be made as single or double sided. ODM, OEM or custom can also meet your project needs.
BPM manufactures and wholesales many types of effective and state-of-the-art geomembrane products to over 80 countries. BPM not only produces high-quality geomembranes, but also provides professional design and installation services. All civil engineering solutions for you. If you have any technical questions, please feel free to contact us.
Specifications of Impermeable Membrane for Phosphogypsum Slag Field Backwater Pool Pollution Isolation Project in Indonesia
- Total quantity– 37,240 squares meters
- HDPE Geomembrane – 1.5mm
- Each roll size is 7m*140m
About BPM
BPM has been specializing in delivering complete line of geosynthetics products and solutions to worldwide customers since its foundation in 2007. BPM had provided many types of effective and state of the art geomembranes, geotextiles, geocells, geosynthetic clay liners (GCLs), drainage boards, geogrids to over 81 countries. Our main customers are from Australia, France, Sweden, UK, Hong Kong, Hungary, New Zealand, Poland, Mexico, Ecuador, Brazil, Pakistan, Bangladesh, Thailand, Vietnam, Malaysia, Indonesia, Singapore, Philippines, Sri Lanka, India, UAE, Saudi Arabia, Qatar, Kenya, Ghana, Ethiopia, Somalia, Nigeria, South Africa, Swaziland, Mongolia, etc.
BPM is not only manufacturing best quality geosynthetic products but also providing professional design and installation service. OEM, ODM, custom development and fabrication are also available. If you have any questions or inquiries, please fill and submit the following form, we will reply as soon as possible.
