Application of HDPE Geomembranes in Slag Storage Yards: Functions, Construction Techniques, and Maintenance Guidelines

Key Functions

1. Pollution Containment:

• With an ultra-low permeability coefficient, HDPE geomembranes effectively block hazardous substances (e.g., heavy metals like lead, mercury, cadmium) from leaching into soil and groundwater, safeguarding ecosystems.

2. Water Infiltration Control:

• Minimizes rainwater penetration, reducing slag moisture content and associated leaching risks while enhancing slope stability.

3. Operational Efficiency:

• Creates a continuous barrier for systematic slag storage, facilitating future recycling or safe disposal.

Critical Construction Steps

1. Base Preparation:

• Remove sharp debris (rocks, branches) and compact the subgrade to ensure a smooth, stable surface (minimum 2% slope for drainage).

2. Geomembrane Installation:

• Laying: Unroll sheets sequentially, avoiding wrinkles; secure temporarily with sandbags.

• Welding: Use heat welding (temperature/speed adjusted per material specs) to achieve airtight seams. Test seams via air pressure/vacuum methods.

3. Slope-Specific Measures:

• Lay a geotextile underlayer before geomembrane placement. Anchor edges at crest/toe using trench backfill or concrete beams. Install anti-slip grooves/anchors for added stability.

4. Protective Layers:

• Base: Cover with 10–20cm sand + ≥30cm compacted clay.

• Slopes: Use grass turf or erosion-control mats to shield against UV/weathering.

Maintenance Protocols

1. Routine Inspections:

• Check for punctures, seam failures, or slope displacement; document and address issues promptly.

2. Repair Methods:

• Small damages: Patch with HDPE overlays via heat welding.

• Large failures: Replace sections and re-weld. Verify repairs with leak tests.

3. Environmental Management:

• Maintain drainage systems to prevent water pooling. Restrict nearby excavation activities and post warning signs.

Conclusion

Proper deployment of HDPE geomembranes—combined with rigorous construction and maintenance—ensures environmental compliance and long-term structural integrity for slag storage facilities.

Title:
"HDPE Geomembranes in Slag Storage: Pollution Control, Installation Best Practices, and Operational Maintenance"

Highlights:
✔ Containment Assurance – Blocks toxic leachates effectively.
✔ Slope Stability – Anchoring and protective layers prevent failures.
✔ Sustainable Management – Enables safer slag handling and reuse.
✔ Durability – Resists chemical/mechanical degradation for decades.