Concrete Repair

QED’s Margel VPI580 is a patented solution for the concrete repair industry to protect rebar embedded within concrete structures.

Margel VPI580 is proven both in the field over the last 30+ years on many 1000’s of concrete repair works as well as in various laboratory test carried out by independent laboratories using a range of scientific analysis techniques.

All products within QED’s system are manufactured under ISO9001, please refer to individual product Technical Data Sheets and MSDS for more detailed information.

Link to page - Chloride Thresholds in Concrete

Link to page - What is Concrete Corrosion / Corrosion within Concrete

Link to page - How Migrating Corrosion Inhbitors Work

Link to page - How to Install Margel 580 in concrete structures

Link to page - Margel 580 Testing

Link to page - External site references / case studies


                Isokon building repaired using Margel 580™

Recommended Repair Procedure when using Margel VPI580

  • Breakout and remove all loose material in the area to be repaired, ensuring that spalled concrete is taken back to the reinforcing steel. Structurally inspect the reinforcing steel and replace/reinforce as necessary
  • Reinstate the profile of the existing structure using high quality concrete repair mortar
  • Prior to inserting the Margel™ 580, mark out the locations to be drilled on the surface of the structure, with respect to the locations of the reinforcing steel to be protected. Ensure a minimum of 2 cartridges per square metre of surface area are installed. Holes should be drilled to a minimum depth of 55mm using a 20mm diameter drill bit.  Insert the Margel™ cartridge, using a small piece of backing-rod (10-30mm diameter) to hold in place. 
  • Infill the hole flush to the profile with concrete repair mortar 
  • Finally apply either a clear or coloured  anti-carbonation coating to the entire structure.

© QED Chemicals Ltd 2018                                                                                                                              Bristol, UK