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Lianyi®Asphalt Glass Grid is the product for special application on surfaces covered by mastic asphalt. The product is manufactured at Feicheng Lianyi Engieering Plastics Co.,Ltd facility that has achieved ISO 9001:2015 certification and meets the requirements of EN 15381:2008. Asphalt Glass Grid is a high strength,open fiberglass grid custom knitted in a stable construction and coated with an elastomeric polymer. Every component of the matrix shall be stabilized against ultraviolet degradation and inert to chemicals normally found in a natural soil environment.
Properties Of Asphalt Glass Grid
*High grid stiffness provides a wrinkle-free installationand a direct load transmission
*Low elongation
*Thermal and chemical stability
*Excellent milling performance
Benefits Of Asphalt Glass Grid
*Elimination of flowing of mastic asphalt during the hardening
*Protection against microcracking in mastic asphalt
*Quick and efficient installation
*Easy cutting
*Thermal and chemical stability
*Excellent milling performance
*Measured unlimited recyclability & enhanced properties in Reclaimed Asphalt Pavement (RAP)
Applications Of Asphalt Glass Grid
*Road widening
*Local repair
*Edge break cracking
*Concrete joints cracking
*Bridge repair
*Pavement joints
*Manholes
*Area-wide repair
*Localized cracking
Keywords：
1.Asphalt Fiberglass Geogrid
3.Self- Adhesive Fiberglass Geogrid
What’s Self Adhesive Fiber Glass Grid ?
Lianyi® Self Adhesive Fiber Glass Grid is manufactured at Feicheng LianyiEngieering Plastics Co.,Ltd facility that has achieved ISO 9001:2015 certification and meets the requirements of EN 15381:2008. Self Adhesive Fiber Glass Grid is a high strength, open fiberglass grid custom knitted in a stable construction and coated with an elastomeric polymer and self-adhesive glue. Every component of the matrix shall be stabilized against ultraviolet degradation and inert to chemicals normally found in a natural soil environment.
Properties Of Self Adhesive Fiber Glass Grid
*High grid stiffness provides a wrinkle-free installation and a direct load transmission
*Low elongation
*Thermal and chemical stability
*Excellent milling performance
Benefits Of Self Adhesive Fiber Glass Grid
*Quick and efficient installation due to self-adhesive backing
*High grid stiffness providing a wrinkle free installation
*Easy cutting
*Good trafficability (suppliers, trucks, paver)
*Thermal and chemical stability
*Excellent milling performance
*Measured unlimited recyclability & enhanced properties in Reclaimed Asphalt Pavement (RAP)
Applications Of Self Adhesive Fiber Glass Grid
*Asphalt concrete pavement
*Asphalt layer
*Rehabilitation of old asphalt roads
Keywords：
1.Asphalt Fiberglass Geogrid
3.Self- Adhesive Fiberglass Geogrid
What‘s Woven Geotextile?
Lianyi®Woven Geotextile refers to geotextile produced by Weaving (also known as shuttling or Weaving) technology. It is composed of two sets of parallel yarns (warp yarns and weft yarns) interwoven at a 90-degree Angle, forming a fabric with stable structure and high strength. This type of geotextile, due to its excellent mechanical properties, is mainly applied in the fields of reinforcement and separation.
Production Process and Raw Materials
1.Raw materials
*Polypropylene (PP) or polyester (PET) are the most commonly used raw materials because they possess high strength, chemical resistance and microbial resistance.
*Yarn form: Usually, flat Yarns (Tape Yarns or Fibrillated Yarns), monofilament Yarns (single filament Yarns), and multi-filament yarns (multi-filament yarns) are used for weaving.
*Flat filament: Made by cutting and stretching plastic film, it is the most common form for manufacturing high-strength and low-cost woven geotextiles (similar to the material of plastic woven bags).
*Monofilament/multifilament: It can produce woven geotextiles with more uniform pores and better permeability, but the cost is usually higher.
2.Process: On a large loom, the warp and weft yarns are interwoven according to a specific structure (such as plain weave) to form a strong and dimensionally stable fabric roll.
Features Of Woven Geotextile
The performance characteristics of woven geotextiles are very distinct, which stems from their woven structure:
*High tensile strength and low elongation: These are its most prominent advantages. They can withstand extremely high loads with minimal deformation, making them highly suitable for projects that require reinforcement and stability.
*High modulus: It exhibits very high stiffness at the initial stage of force application.
*Excellent puncture and tear resistance: With a compact structure, it can effectively resist damage from rough fillers such as crushed stones.
*It exerts strength at a relatively low strain: It can provide effective reinforcement even when the soil undergoes very small deformation.
*Uniform and controllable pore size: By adjusting the yarn type and weaving density, products with different opening sizes (AOS) can be produced, but their porosity is usually lower than that of nonwoven geotextiles.
*Permeability: Its water permeability capacity depends on the size and number of pores. Compared with nonwoven geotextiles, its water flow conductivity (water conductivity) in the plane is usually better, but its permeability in the vertical direction is lower.
Functions and Applications Of Woven Geotextile
The core functions of woven geotextiles are “reinforcement” and “separation”, and sometimes they are also used for “filtration”, but careful selection is needed.
1.Reinforcement
Principle: By taking advantage of its high strength and low elongation characteristics, it disperses the load and enhances the overall stability and bearing capacity of the soil mass.
Application
*Road/railway subgrade on soft soil foundation: Laid on soft foundation to prevent the filling material from sinking and to disperse vehicle loads.
*Steep retaining walls and slope reinforcement: Combined with soil to form a solid composite structure, resisting earth pressure and landslides.
*Reinforced soil structure.
2.Separation
Principle: It is laid between two different types of materials (the lower layer of soft soil and the upper layer of crushed stone base) to prevent them from mixing with each other and maintain their respective structural integrity.
Application
Road base layer: Prevent the crushed stone base layer from sinking into the lower soft soil, while allowing water to pass through, and extend the service life of the road.
3.Filtration (conditional use)
Principle: Allow water to pass through while preventing excessive loss of soil particles. Woven geotextiles can achieve “unidirectional filtration” due to their relatively uniform pore diameters.
Application
It is used in situations that require high strength and high drainage performance, such as the drainage body wrapping of earth-rock DAMS and the gravel layer under coastal protection.
Keywords:
1.Woven Geotextile
What‘s Composite Geomembrane?
Lianyi®Composite geomembrane is a kind of geosynthetic material made by combining geomembrane (anti-seepage layer) and geotextile (protective layer) through methods such as hot pressing or adhesive bonding. It combines the excellent impermeability of geomembrane with the good mechanical properties and reverse filtration and drainage functions of geotextile.
Core Structure and Function
Composite geomembranes usually adopt a “sandwich” structure, generally being “one membrane and two fabrics” (one layer of geomembrane is compounded with one layer of geotextile on each side) or “one membrane and one fabric” (one layer of geomembrane is compounded with geotextile on only one side).
1.Core layer: Geomembrane
*Materials: Mainly high-density polyethylene (HDPE), low-density polyethylene (LDPE), polyvinyl chloride (PVC) and other polymers are used.
*Function: Provide core anti-seepage and isolation functions. Its permeability coefficient is extremely low (usually < 10⁻¹¹ cm/s), which can effectively prevent the leakage of water or contaminants.
2.Protective layer: Geotextile
*Material: Usually short-fiber or long-fiber non-woven fabric made of polyester (PET) or polypropylene (PP).
*Function
Protection: Prevent the geomembrane from being punctured by sharp objects such as sand, gravel, backfill soil, etc. on the upper and lower layers.
Drainage and exhaust: The non-woven fabric structure can guide and discharge pore water and gas parallel to the membrane surface, eliminate water vapor pressure, and prevent the membrane from being punctured.
Increase friction: Enhance the friction coefficient of the material surface, improve the stability of the contact surface with the soil, and prevent sliding during slope laying.
Features Of Composite Geomembrane
*It has excellent anti-seepage performance: this is its most core feature.
*Strong puncture and tear resistance: Geotextiles significantly enhance the mechanical strength of the overall material, making it more durable.
*High friction coefficient: It combines more firmly with the soil and has better slope stability.
*Convenient construction: The composite material can complete the two processes of anti-seepage and protection in one laying, which improves the construction efficiency.
Application Of Composite Geomembrane
Composite geomembrane is an indispensable material in modern anti-seepage projects and is widely used in:
*Water conservancy projects: Anti-seepage linings for reservoirs, DAMS, rivers and canals; Anti-seepage for water gates and pumping stations.
*Environmental protection project
*Landfill: As the base cushion layer and top cover layer, it prevents the leachate from garbage from polluting the underground soil and water bodies.
*Anti-seepage for regulating tanks, sedimentation tanks and evaporation ponds in sewage treatment plants.
*Tailings ponds and red mud storage yards: Prevent the leakage of harmful components from industrial waste residues.
*Traffic engineering: Anti-seepage isolation of highway and railway subgrades; Waterproofing for tunnel engineering.
*Construction engineering: Waterproofing and moisture-proofing for basements and rooftop gardens.
*Aquaculture: Anti-seepage linings for aquaculture ponds and fish ponds.
Precautions for Purchase and Construction
Index selection: Reasonable specifications should be chosen based on the engineering design requirements, including:
*Mass per unit area (e.g., 600g/m², 800g/m²)
*Geomembrane thickness (e.g., 0.5mm, 1.0mm)
*Breaking strength, tear strength, CBR puncture strength
*Permeability coefficient
*Welding process: After laying, the pieces need to be formed as a whole through hot wedge welding or hot air welding, and the weld seams should undergo strict non-destructive (air pressure testing) and destructive testing (sampling for tensile testing) to ensure the integrity of the anti-seepage system.
*Anchoring: Reliable anchoring treatment is required at the structural edge.
In summary,composite geomembrane is a high-performance engineering material that achieves a “1+1 > 2” effect through material composite technology. It integrates anti-seepage.
Lianyi®PP welded geogrid(polypropylene welded geogrid) is a kind of geosynthetic material with a mesh structure made mainly of polypropylene (PP) through hot-melt welding technology. It features light weight, corrosion resistance and low cost, and is widely used in fields such as roadbed reinforcement, slope protection and water conservancy projects.
*Lightweight and high strength: Moderate tensile strength (20 to 100kN/m), light weight, convenient for transportation and construction.
*Chemical resistance: PP material is resistant to acids, alkalis, salts and microbial erosion, and is suitable for damp or chemically polluted environments
*Good flexibility: Compared with steel-plastic grating, PP grating has a stronger deformation capacity and can adapt to uneven settlement.
*Low cost: The raw material prices are relatively low, and its economic efficiency is superior to that of PET or glass fiber geogrid.
*UV resistance (optional) : By adding UV inhibitors, the outdoor service life can be prolonged.
*Environmentally friendly and recyclable: PP material can be recycled and reused, meeting the requirements of sustainable development.
Common Types Of PP Welded Geogrid
It has high longitudinal strength but low transverse strength, and is suitable for unidirectional force-bearing projects such as retaining walls and steep slope reinforcement.
The strength is balanced in both longitudinal and transverse directions, making it suitable for scenarios that require uniform force distribution, such as soft foundation treatment and roadbed reinforcement.
Embed fibers or grids in the PP substrate to enhance the overall strength.
Application Of PP Welded Geogrid
*Reinforcement of highway/railway subgrades
*Reduce settlement and prevent road surface cracking.
*Slope protection and ecological restoration
*Combined with grass planting net pads, it is used for greening slope projects.
*Soft soil foundation treatment
*Enhance the bearing capacity of the foundation and prevent lateral displacement.
*River slope protection and embankment reinforcement
*Strong water resistance, suitable for water conservancy projects.
*Protection of anti-seepage layers for landfill sites and tailings ponds
*As a reinforcing layer, it protects the anti-seepage membrane.
Keywords:
1.Welded Geogrid
Lianyi® Geomembrane is a kind of geosynthetic material with extremely low water permeability, mainly made of high-molecular polymers (such as plastics, rubber, etc.). Essentially, it is an artificial anti-seepage roll material, similar to a huge “plastic sheet”, but its performance, durability and engineering characteristics are far beyond those of ordinary plastic sheets.
Main Raw Materials and Types
According to the different polymer materials used, geomembranes are mainly classified into the following categories:
1.HDPE (High-density Polyethylene) geomembrane
*Features: Strong resistance to chemical corrosion, excellent UV aging resistance, high tensile strength, and a wide range of operating temperatures. It is currently the most widely used and largest in quantity type.
*Appearance: Usually black (with carbon black added to enhance anti-aging properties), and there are also other colors such as green, blue, etc.
*Applicable scenarios: Landfill sites, sewage treatment plants, tailings ponds, hazardous waste disposal sites and other projects with extremely high requirements for anti-seepage.
2.LLDPE (Linear low-density Polyethylene) geomembrane
*Features: Softer and more flexible than HDPE, better resistance to stress cracking, and stronger adaptability to uneven settlement.
*Applicable scenarios: Artificial lakes, landscape water systems, aquaculture, underground projects and other projects that require good deformation adaptability.
3.PVC (polyvinyl chloride) geomembrane
*Features: Good flexibility, easy to weld, and relatively low cost. However, it has poor UV resistance and usually requires the addition of plasticizers (there may be a problem of long-term migration aging).
*Applicable scenarios: Channel seepage prevention, reservoirs, temporary coverage, etc.
4.Other types: such as EPDM (Ethylene Propylene diene monomer rubber) geomembrane (with excellent cold resistance), CPE (chlorinated polyethylene) geomembrane , etc., are used in some special occasions.
*Anti-seepage and isolation: This is its most core function. It can effectively prevent the migration of liquids (water, sewage, chemical solutions) and gases, and at the same time separate two geosynthetic materials with different properties.
*Durability: High-quality geomembranes have excellent resistance to chemical corrosion, ultraviolet rays and aging, and their designed service life can reach over 50 years.
*High strength and elongation: It can withstand certain construction tensile stress and foundation settlement deformation during the service period.
*High cost-effectiveness: Compared with traditional clay anti-seepage layers, it has significant advantages such as thin thickness, light weight, fast construction speed, and saving land space and cost.
Geomembrane is an indispensable material in modern environmental geotechnical engineering and is widely used in
*Environmental protection project
*Landfill: As the anti-seepage layer for the base and roof, it prevents leachate from polluting the underground soil and water bodies.
*Anti-seepage for regulating tanks, anaerobic tanks and oxidation ponds in sewage treatment plants.
*Hazardous waste disposal site: Safely isolate harmful substances.
*Water conservancy projects
*Reservoirs, artificial lakes and rivers: Prevent water resource leakage.
*Channel: Anti-seepage of irrigation channels to enhance the efficiency of water resource utilization.
*Mining Engineering
*Tailings pond: Prevent tailings water containing heavy metals and other harmful substances from seeping into the ground.
*Municipal and Landscape Engineering
*Roof garden: Waterproof and root-proof.
*Landscape water pools and golf course ponds.
*Moisture-proofing and waterproofing for basements and tunnels.
*Aquaculture industry
*The bottom protection and seepage prevention of aquaculture ponds facilitate water level control and water quality management.
*Agriculture
*Anti-seepage for water storage cellars and irrigation water tanks.
Key Technical Points for Construction
The performance of geomembranes is highly dependent on correct construction. Key links include:
*Base layer treatment: The foundation must be level, compacted and smooth, free of tree roots, sharp stones and other sharp objects to prevent the geotextile membrane from being punctured.
*Laying: Carry out the laying when the weather is good, relax the laying to avoid stress concentration, and leave sufficient expansion and contraction allowance.
*Welding: This is the most crucial technology. The coils are joined into a single unit by using double-track hot melt welding (to form cavities for pressure detection) and extruded electrode welding (for detailed areas and repairs).
Detection
*Non-destructive testing: Conduct pneumatic testing (for double-track welding) or vacuum box testing (for extrusion welding) on all welds to check the sealing performance.
*Destructive testing: On-site weld seam samples are cut and sent to the laboratory for shear and peel strength tests.
*Protection: After laying is completed, a protective layer (such as geotextile, sand, etc.) should be covered in time to prevent direct sunlight and mechanical damage.
Common Misunderstandings and Precautions
It’s not the case that the thicker the better: The appropriate thickness (commonly 0.5mm – 3.0mm) and material of the geomembrane should be selected based on the engineering design requirements (such as water head pressure and foundation conditions).
The quality of materials is of vital importance: One should choose a brand with a good reputation and check its relevant certifications and test reports.
Professional construction is the key: “Three parts materials, seven parts construction.” It must be carried out by an experienced construction team with professional equipment; otherwise, even the best materials will not be able to play their role.
Summary
Geomembrane is a highly efficient and reliable new type of anti-seepage material, and it is a key technical product for solving problems such as environmental pollution control, water resource conservation, and infrastructure construction. Its successful application is a systematic project, which requires strict control over every link from material selection, design, construction to quality inspection.
Keyword：
1.Geomembrane