CRL commenced work on the West Gate Tunnel Project (WGTP) in late 2023 after other contractors were unable to meet their contractual requirements. Since then, CRL has continued to deliver critical waterproofing and structural repair services across the project and is expected to remain engaged until project completion. CRL also has in-house capability to perform pull-off adhesion testing in accordance with VicRoads specifications, ensuring compliance and performance of bonded membranes and coatings.

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Material Used:

• Primary Membrane: Fosroc Proofex Torchseal A900
• Additional Membranes: Sika Testudo (used in select areas)

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Scope of Works:

CRL was initially engaged to install a Mapei multi-layer liquid waterproofing system on the Freeway Control Centre (FCC)Building. The success of these works led to further involvement across the project, including:

• Additional liquid-applied waterproofing and protective coatings to multiple buildings and bridge structures
• Large-scale torch-applied membrane works

To date, CRL has completed approximately 13,535m² of torch-applied membrane across the North and South Portals of the tunnel and associated bridge structures.

Structural Crack Injection:

In addition to waterproofing, CRL has completed significant structural epoxy crack injection works across various buildings and bridges. Cracks exceeding 0.2 mm were addressed in compliance with VicRoads repair standards. To ensure quality assurance and compliance, CRL uses Ultrasonic Pulse Velocity (UPV) testing to verify the extent of epoxy resin penetration and confirm that cracks have been filled according to VicRoads specifications.

Process Summary:

• Cracks are prepared and cleaned.
• Surface-mounted flanges (packers) are epoxied over the cracks.
• The remaining exposed surface is sealed using Nitomortar AP epoxy.
• Injection of Nitofill LV epoxy resin is then carried out.
• After curing, packers are removed and the surface is ground flush.

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