RockStab HCA 10 – Advanced Hydration Control Admixture for Sprayed Concrete

RockStab HCA 10 is a high-quality, non-chloride admixture engineered to precisely control cement hydration, extending concrete workability from a few hours up to several days. Designed for tunneling, mining, slope stabilization, and annulus grouting, it eliminates the need for pump or pipe cleaning during breaks, reduces rebound and dust, and ensures full utilization of wet and dry sprayed concrete. Its flexible dosing makes it a cost-effective, reliable solution for both temporary and permanent ground support applications.

Features & Benefits

Key Features

Non-chloride, liquid hydration control admixture – Safe for steel reinforcement.
Flexible workability retention – Adjustable open times from 3 hours to 72 hours.
Versatile application – Effective in tunnelling, mining, slope stabilisation, TBM annulus grouting, and cementitious injection systems.
Compatible with wet and dry mixes – Can be introduced during or after mixing.
No system flushing required – Prevents pump and pipe cleaning during work stoppages.
Reduces rebound and dust – Improves working conditions and material efficiency.
Adaptable dosage – 0.2%–2% by weight of cement, depending on cement type, w/c ratio, and temperature.
Flexible packaging – Available in 20 L, 210 L, 1000 L, and bulk containers.

Benefits

Time and cost savings – Fewer interruptions, no wasted material, and reduced cleaning downtime.
Improved efficiency – Maintains mix performance during unexpected delays or long transport times.
Enhanced safety and site conditions – Lower dust and rebound protect workers and improve application quality.
Greater project flexibility – Adjustable open times allow contractors to tailor performance to site conditions.
Reliable, consistent results – Ensures stable hydration control and predictable sprayed concrete behaviour.
Sustainable operations – Full utilisation of concrete mixes with minimal disposal needs.