MasterRoc HCA 20

Cement hydration control system for wet and dry sprayed concrete, grouting and cement injection

Material Description

MasterRoc HCA 20 is a high quality, liquid, non-chloride chemical admixture which controls the dynamics of cement hydration. It delays hydration by suspending the hydration process and enables reactivation hours or even days later with no loss of quality in the hardened sprayed concrete. When dispensed into wet or dry mixes at the batching plant, it fully stabilizes the hydration process by forming a protective barrier around the cement particles. MasterRoc HCA 20 can be used with all types of cement minerals (C3S, C3A, C2S, C4AF and gypsum).

To re-activate the hydration process and accelerate strength gain in mixes stabilized with MasterRoc HCA 20, MasterRoc SA series of alkali-free accelerators is added at the nozzle or injection point.

Areas of Application

• Tunneling and mining

• Temporary and permanent support

• Slope stabilization

• Annulus grouting (TBM)

• Cementitious injection systems

Characteristics and Benefits

• Wet and dry concrete mixes can be kept workable for up to 3 days, providing flexibility in batching and utilization.

• Fully flexible delivery options for sprayed concrete mixes.

• No cleaning of pumps or pipes during work interruptions.

• Complete use of wet and dry mixes – no waste disposal.

• Time and cost saving.

• Reduces rebound and dust during application.