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Coal Ash Barrier Geomembrane

Name: China Coal Ash Barrier Geomembrane Manufacturers Suppliers Factory - Low Price - Ruiheng Building Materials
Brand: Ruiheng
SKU: 275818375

Coal ash barrier geomembrane is a specially designed impermeable liner designed to retain coal combustion residual (CCR), commonly known as coal ash. A byproduct of coal-fired power plants, coal ash contains heavy metals and toxic substances that can leach into groundwater and soil if not properly handled. This geomembrane provides a high-performance barrier to prevent environmental contamination while ensuring regulatory compliance.

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Description

Products Description of Coal Ash Barrier Geomembrane

geomembrane liner

Tested Item	Test Method	Frequency	Minimum Average Value
			RH0.50 mm	RH0.75 mm	RH1.00 mm	RH1.50 mm	RH2.00 mm
Thickness, (minimum average), mm Lowest individual reading	ASTM D 5199	every roll	0.50 0.425	0.750 0.675	1.00 0.90	1.50 1.35	2.00 1.80
Density, g/cm3	ASTM D 1505	90,000 kg	0.940	0.940	0.940	0.940	0.940
Tensile Strength at Break, N/mm Strength at Yield, N/mm Elongation at Break, % Elongation at Yield, %	ASTM D 669	9,000 kg	13 7 700 12	20 11 700 12	27 15 700 12	40 22 700 12	53 29 700 12
Tear Resistance, N	ASTM D 1004	20,000 kg	60	93	125	187	249
Puncture Resistance, N	ASTM D 4833	20,000 kg	160	240	320	480	640
Carbon Black Content, % (Range)	ASTM D 603*/4218	9,000 kg	2.0 - 3.0
Carbon Black Dispersion	ASTM D 5596	20,000 kg	Note(1)	Note(1)	Note(1)	Note(1)	Note(1)
Notch Constant Tensile Load, hr	ASTM D 5397,	90,000 kg	300	300	300	300	300
Oxidative Induction Time, min	ASTM D 3895,	90,000 kg	>100	>100	>100	>100	>100

Key Features & Benefit of Coal Ash Barrier Geomembrane

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1. Excellent Chemical Resistance

Leachate Resistance: Prevents harmful substances (such as arsenic, mercury, and lead) from seeping into groundwater.

2. High Tensile and Puncture Resistance

Reinforced Geomembrane Options: Includes grid reinforcement or multi-layer designs for enhanced durability.

Settlement and Stress Cracking Resistance: Manages differential settlement in coal ash storage facilities.

3. Low Permeability

Hydraulic Barrier: Extremely low permeability (≤ 1×10⁻¹² cm/s) ensures no liquid seepage.

Long Service Life

Over 50 years: Resistant to performance degradation caused by chemicals, temperature fluctuations, and mechanical stress.

5. Customizable Installation

Available in rolls (5-8 meter widths), suitable for projects.

Heat-fused or chemically bonded seams ensure leak-proof joints.

6. Environmental Compliance

Complies with U.S. Environmental Protection Agency (EPA), EU, and international standards (e.g., GRI-GM13)

Applications of Coal Ash Barrier Geomembrane

1. Coal Ash Pond Liners

Prevents leachate from seeping into the surrounding soil and groundwater.

Applicable for both new construction and the rehabilitation of existing ponds.

2. Landfill Base and Cover Layers

Bottom Liner: Isolates coal ash from the subsurface environment.

Final Cover: Prevents rainwater infiltration and post-closure contamination.

3. Surface Water Retention Ponds

Safely store wet coal ash slurry in water retention ponds.

4. Mine Reclamation

Liner systems for the reuse of coal ash in abandoned mine backfill.

Advantages Over Traditional Containment Methods

Feature	Geomembrane Liner	Clay Liner	Concrete Lining
Permeability	Extremely Low	Moderate	Low (but cracks over time)
Installation Speed	Fast	Slow	Very Slow
Flexibility	High (conforms to terrain)	Medium	None (rigid)
Chemical Resistance	Excellent	Poor (erodes)	Moderate
Longevity	50+ years	10–20 years	20–30 years (with maintenance)
Cost Efficiency	Moderate	Low (but high maintenance)	High

FAQ

Q1: How thick should a fly ash geomembrane be?
A: Typically 1.5-2.5 mm; thicker thickness is recommended for high-stress applications.

Q2: Why is HDPE the preferred material for fly ash storage?
A: HDPE offers excellent chemical resistance, high tensile strength, and long-term resistance to fly ash leachate (acids, alkalis, and heavy metals).

Q3: Can HDPE geomembranes withstand the high temperatures found in fly ash ponds?
A: Yes, HDPE can withstand temperatures up to 80°C (176°F) and remains stable under typical fly ash storage conditions.

Q4: Does an HDPE geomembrane require a protective layer?
A: Yes, a non-woven geotextile (300-500 g/m²) is recommended to prevent puncture from sharp fly ash fragments.

Q5: Can an HDPE liner be repaired if damaged?

A: Yes, patches can be permanently affixed by squeeze welding or hot wedge welding.