PROJECT COMPLETION REPORT
Active Water Leakage Treatment & Structural Injection Works
Tank 05 – Argentine Complex
Ref No: UMS-25-RE-01607
Date: 16/07/2025
Client: URBACON TRADING & CONTRACTING – Doha, Qatar
Attention: Eng. Yasser
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1. Executive Summary
This report documents the successful completion of active water leakage rectification works at Tank 05 within the Argentine Complex.
The intervention addressed persistent joint leakage through a dual-resin injection system combining rigid polyurethane for immediate water stoppage and flexible polyurethane for long-term elastic sealing.
The adopted methodology ensured:
• Immediate active leak arrest
• Structural stabilization
• Flexible long-term waterproofing
• Durable surface reinstatement
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2. Scope of Work
The works included:
- Surface preparation and joint exposure
- Drilling injection holes at 45° angle toward leakage paths
- Installation of high-pressure injection packers
- Primary resin injection (Power Proof PU – rigid system)
- Secondary injection (Sika® Injection-306 – flexible system)
- Removal of packers after curing
- Reinstatement using DCP cementitious grout
- Final inspection and verification
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3. Technical Materials & Justification
3.1 Primary Injection System
Material: Power Protect 0-95 & W-70 (Hydrophobic PU Resin)
Function: Immediate water cut-off
Technical Characteristics:
• Rapid reaction with moisture
• Closed-cell rigid foam formation
• Strong adhesion to wet concrete
Used as the initial sealing layer to stop active water ingress and fill voids.
3.2 Secondary Injection System
Material: Sika® Injection-306 (Flexible PU Resin)
Function: Long-term elastic joint sealing
Technical Characteristics:
• Permanently elastic after curing
• Expands upon water contact
• Certified under EN 1504-5
Applied after stabilization phase to accommodate thermal movement and pressure fluctuations.
3.3 Final Reinstatement Material
Material: DCP Cementitious Grout
Function: Injection hole closure and cosmetic restoration
Properties:
• Non-shrink
• High bonding strength
• Durable under wet-dry cycles
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4. Execution Methodology
4.1 Surface Preparation
• Cleaning and isolation of affected area
• Removal of laitance and contaminants
4.2 Drilling & Packer Installation
• Drilling at 45° inclination toward leakage path
• Installation and pressure testing of packers
4.3 Injection Process
Step 1: Low-pressure injection using rigid PU resin to stop active leakage.
Step 2: Secondary injection using flexible PU resin for elastic sealing.
• Gradual pressure increase to penetrate micro-cracks and capillaries.
4.4 Finishing
• Removal of packers after full curing
• Injection hole repair with DCP grout
• Surface smoothing and restoration
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5. Health, Safety & Environmental Compliance
All works were executed under UCC’s HSE Management Plan:
• PPE enforcement
• Controlled chemical handling
• Ventilation compliance
• Zero incidents recorded
Warranty & Recommendations
United for Marine Services provides a 6-month workmanship warranty for the injection works.
In case of leakage reoccurrence due to workmanship within this period, rectification will be carried out at no additional cost.
Recommendations:
• Avoid mechanical disturbance at treated joints
• Maintain structural stability to reduce stress movement
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8. Conclusion
The leakage rectification at Tank 05 has been successfully completed using a technically engineered dual-resin injection system tailored to site conditions.
The applied methodology meets international concrete injection standards and ensures a secure, durable, and long-lasting waterproofing solution.