PCD Lining with GSE Geomembrane and MIRAFI Geotextile — Case Study

Case Study Brief

The pollution-control dam required an engineered lining system to contain collected contact water. Geosynthetics Africa supplied and installed 2.0 mm GSE® HDPE geomembrane over MIRAFI® P40 protection geotextile. Material selection followed the project’s containment and protection requirements. The geotextile provided a cushioning layer beneath the membrane; its suitability depends on the supporting surface and the project design. The works covered subgrade review, geotextile placement, panel deployment, perimeter anchorage and welded seams. Non-destructive checks used the method appropriate to each seam configuration. Destructive samples supported seam-strength assessment, and identified defects were repaired and retested. Quality records supported handover of the lining works. Membrane service life depends on exposure, operating conditions, design and ongoing protection, so no fixed lifespan or universal material-superiority claim is made.

GSE HDPE Lining - PCD Dam - Geosynthetics Africa

PCD Geomembrane Lining Africa

HDPE Installation - PCD Afrimat

Afrimat PCD Geomembrane Lining Geosynthetics Africa

The Installation Challenge

The pollution-control dam required consistent protection, welded containment and traceability across the 6,500 m² lining area. Subgrade condition, anchorage and weld quality all affected the final system.

MIRAFI® P40 protection geotextile and 2.0 mm GSE® HDPE geomembrane were supplied and installed as the specified assembly. Trial seams, production records, applicable non-destructive checks and destructive samples supported the installation QA/QC.

Installation Sequence

Review the prepared dam surface

Inspect the supporting formation and anchorage details before releasing the area for lining.

Place the protection layer and panels

Install MIRAFI® P40 geotextile and deploy the 2.0 mm GSE® HDPE panels with roll and panel traceability.

Complete seams and anchorage

Carry out controlled welding and form the perimeter and interface details to the project requirements.

Test and document the completed works

Use the appropriate seam-test method for each joint configuration, repair and retest defects, and compile the quality and as-built records.

Field Quality Assurance (QA/QC) Checklist

Quality checks recorded on this installation.

Material receipt and traceability: roll identification checked against manufacturer batch documentation.

Subgrade inspection: compaction and surface condition reviewed before liner deployment.

Welding controls: parameters and workmanship checked against the project requirements and manufacturer guidance.

Non-destructive seam checks: air-channel testing for suitable dual-track seams and vacuum-box testing where applicable; identified defects repaired and retested.

Trial seams: welding parameters assessed before production welding and following relevant changes in conditions.

Handover records: roll traceability, weld logs, test results and as-built information compiled for the client.

Products Used in Project

Products supplied and installed on this project.

Geotextiles

Mirafi® P

Quantity: 6500

Geomembranes

GSE HD Smooth Geomembrane Liner

Quantity: 6500

“In-house project comment: This PCD demonstrates our integrated supply, installation and QA/QC scope. The specified protection geotextile and HDPE liner were delivered as one documented containment assembly.

Ivan M

Project Manager · Geosynthetics Africa — internal project team

PCD Lining with GSE Geomembrane and MIRAFI Geotextile — 6,500 m²