Modern tunnelling and mining projects require concrete that delivers fast strength development, durability, and excellent workability under demanding conditions. In weak rock environments, concrete segments act as immediate structural linings for fully excavated tunnel sections. These precast tunnel segments must achieve high early strength, dimensional precision and long-term durability to ensure safety and stability in underground construction.
Sika’s advanced admixture technologies make it possible to produce high-performance concretes that meet these requirements providing excellent pumpability, flow, compaction and early strength development, followed by low permeability and long-lasting durability.
Advantages of Sika Admixtures for Tunnelling and Mining
- Rapid early strength development enables fast demoulding and continuous production of tunnel segments
- Enhanced durability with admixture systems designed to maintain long-term performance even under heat or steam curing conditions
- Excellent workability and pumpability ensure consistent concrete flow for tunnelling, shaft lining and slickline applications
- Optimised mix performance using Sika® Viscocrete® technology to improve cost efficiency
- Proven expertise backed by over 100 years of experience supporting tunnelling and mining concrete applications worldwide
