Cormix backfilling grout additives are specifically formulated to improve the performance of two-component and single-component backfill grouts used in segmental tunnel lining. These additives enhance grout flowability, control setting time, reduce water demand, and ensure consistent strength development, allowing for efficient pumping over long distances.
Whether used for EPB, slurry TBM, or conventional tunnelling with segment lining, Cormix additives help achieve a stable, homogeneous grout that fully fills the annular gap and provides structural support to segments while minimizing ground movement.
The range includes liquid accelerators for rapid set and plasticising admixtures for improved grout workability, ensuring better placement, reduced shrinkage, and long-term durability of the tunnel lining system.
Key Features ;
• Improves grout flowability and pumping efficiency
• Controls initial and final setting time
• Enhances strength development and stability
• Reduces water demand and prevents segregation
• Suitable for single and two-component backfill grouts
• Compatible with EPB and Slurry TBM systems
Typical Applications:
• Backfilling behind precast tunnel segments
• Pumping long-distance annulus grouting
• EPB and Slurry TBM tunnelling operations
• Ground support and stabilization behind lining
• Reducing settlement and improving tunnel lining durability
⭐ Our Product Range Includes:
• Cormix LA1 – Liquid Accelerator for Backfill Grout
• Cormix P20 – Water-Reducing Plasticising & Retarding Admixture
