Hazardous Waste Landfill Geomembrane

Landfills for municipal and hazardous waste present complex operating conditions. Leachate often contains diverse and highly corrosive substances—such as strong acids, strong alkalis, heavy metals, and organic solvents. Furthermore, sites are subject to challenges like foundation settlement, heavy machinery traffic, and prolonged outdoor UV exposure. Consequently, the performance requirements for geomembranes in these applications far exceed those for standard water or sewage pond liners.

Our Hazardous Waste Landfill Geomembranes are manufactured in strict accordance with the GB/T 17643 national standard, with mechanical properties that surpass standard requirements. Featuring specialized aging-resistant and crack-resistant formulations, they are available in both smooth and textured finishes. They enable the construction of comprehensive composite containment systems designed to meet the 50-year service life requirements of solid waste projects, finding wide application in municipal waste landfills, hazardous waste disposal sites, and associated containment structures.

Raw Materials and Formulation System

1. Raw Material Selection

These geomembranes utilize 100% virgin HDPE resin with a density of no less than 0.94 g/cm³. We strictly exclude recycled waste, impurities, and harmful additives, ensuring material stability and environmental safety at the source while eliminating issues common to recycled materials, such as premature aging and leakage.

2. Manufacturing Process

Produced via a high-temperature extrusion-calendering process, the geomembrane features a dense molecular structure and high crystallinity. The sheet maintains uniform thickness throughout, free from localized thin spots or hidden pinholes, ensuring a homogeneous and integral structure.

3. Functional Formulation

Precisely formulated with 2.0%–3.0% carbon black, antioxidants, and environmental stress-cracking resistance (ESCR) agents, the synergistic combination of these ingredients significantly enhances the membrane's UV resistance and durability against aging. 4. Basic Durability

The finished product operates within a temperature range of -60°C to 80°C, maintaining its performance characteristics in both high and low-temperature environments. It is non-toxic and harmless, fully complying with relevant national standards for geosynthetic materials.

Mechanical Performance Assurance

1. Tensile Properties

Tensile yield strength ≥ 29 kN/m; elongation at break ≥ 700%. The material exhibits flexible elongation when subjected to uneven foundation settlement or external tensile forces, making it resistant to rupture or damage.

2. Puncture Resistance

Taking the 2.0mm specification as an example, puncture resistance strength is ≥ 650 N. It withstands site gravel, sharp edges of solid waste, and the impact or pressure of construction machinery, thereby reducing the risk of puncture-induced leakage.

3. Tear Strength

Right-angle tear strength ≥ 200 N. The material features excellent crack-arresting properties; if minor localized damage occurs, cracks do not propagate or expand.

4. Welding Performance

The strength of on-site hot-melt welded seams is at least 95% of the base material's strength. The seams are highly stable and share the same service life as the geomembrane itself, preventing premature joint failure.

Impermeability Overview

Serving as the core impermeable barrier for landfills, this Hazardous Waste Landfill Geomembrane achieves zero-leakage protection. It offers various styles and combination options to meet the specific requirements of different construction zones.

1. Permeability Metrics

Permeability coefficient ≤ 1×10⁻¹³ cm/s; the overall barrier efficiency against leachate and pollutants reaches 99.99%, effectively blocking the downward seepage of liquid waste and protecting soil and groundwater resources.

2. Thickness Specifications

Standard thicknesses include 1.5mm, 2.0mm, 2.5mm, and 3.0mm. Thickness tolerance is controlled within ±3%, ensuring high dimensional precision suitable for projects with varying impermeability requirements.

3. Surface Types

Available in three categories: smooth, single-textured, and double-textured. Smooth surfaces are suitable for base-layer impermeability, while textured surfaces offer superior friction and are designed for slope installation, effectively preventing membrane slippage.

4. Composite Impermeable Systems

It can be combined with geotextiles or GCLs (Geosynthetic Clay Liners) to create a dual-layer impermeable structure. The bentonite material provides self-healing and reinforcement capabilities, further enhancing the overall safety level of the containment system.

Corrosion Resistance and Durability

1. pH Tolerance Range

Suitable for extreme aqueous environments with pH values ranging from 2 to 12; the material structure and performance remain unaffected by strong acid or strong alkali conditions.

2. Media Compatibility

Capable of long-term resistance to corrosion from various leachates—including heavy metals, organic solvents, high salinity, and high organic content—without dissolving or degrading.

3. Stress Cracking Resistance

Environmental stress cracking resistance exceeds 1,500 hours; the material resists cracking and powdering even under the combined influence of long-term stress and corrosive agents.

4. Design Service Life

Hazardous Waste Landfill Geomembrane is designed for a service life of at least 50 years in hazardous waste landfill applications. It maintains stable performance whether buried, submerged, or exposed to the elements, eliminating the need for frequent replacement or repair.

Application Scenarios

1. Municipal Solid Waste Landfills

Suitable for use as the primary base liner, side-slope liner, and final closure cover, meeting standard requirements for municipal solid waste disposal sites.

2. Hazardous Waste Landfills

Given the higher pollution potential of hazardous waste, a thicker specification (2.5 mm or greater) is recommended for use as the core primary liner.

3. Ancillary Liquid Storage Facilities

Compatible with the construction of impermeable linings for structures such as leachate equalization tanks, emergency collection ponds, and on-site wastewater treatment tanks.

4. Other Industrial Storage Sites

Highly versatile; suitable for applications such as tailings ponds, chemical material storage tanks, and general industrial solid waste storage yards.

Key Advantages of Choosing Tongfu

1. In-House Manufacturing Capacity

Operates standardized production workshops equipped with imported, fully automated production lines. With an annual capacity exceeding 50 million square meters and ample inventory, the company can meet bulk supply requirements for large-scale projects and fulfill urgent orders.

2. End-to-End Quality Control

A three-tier quality inspection system is implemented, covering incoming raw material testing, in-process sampling, and comprehensive finished product testing. Authoritative third-party test reports are available for every product batch, facilitating project acceptance inspections and supervisory spot checks.

3. Flexible Customization Services

Thickness and textured surface patterns can be customized to meet specific requirements. Readily available stock includes wide-format rolls (4m, 6m, and 8m), which minimize on-site seams, thereby enhancing construction efficiency and impermeability performance.

4. Comprehensive Technical Support

A professional engineering team provides one-stop services—including preliminary design, specification selection, on-site construction guidance, and welder skills training—to resolve various technical issues encountered during project execution.