When a critical machine or precast element needs support, but project timelines demand immediate return to service, downtime is not an option. RLA Penatech HES Grout delivers the high early strength and reliable, non-shrink support required to get heavy plant and structures back online quickly, without risking long-term stability.

Why this product exists

RLA Penatech HES Grout is engineered for situations demanding structural integrity under dynamic loads and minimal interruption to operations. It is a Class C cementitious grout, specifically formulated for high early strength gain, exceptional flow characteristics, and dual-stage shrinkage compensation. This ensures a complete fill, critical for load transfer, while preventing future structural issues from grout contraction in both plastic and hardened states.

The numbers that matter

• >60 MPa compressive strength at 24 hours (Flow consistency): This means heavy machinery and structural components can be reinstated and bear significant loads within one day. The rapid strength development minimises costly operational downtime, a critical factor for industrial and civil projects.
• Dual-stage expansion (1-2% in plastic state, 0% bleed): Shrinkage is a common failure point for grouts. This controlled expansion actively compensates for it, ensuring a full bond to base plates and anchoring bolts. Coupled with zero bleed, it guarantees a dense, void-free contact area for consistent load distribution.
• Grouting from 10mm to 120mm in a single pour: This broad application thickness simplifies large-volume pours under base plates and through bolt holes, making it suitable for a wide range of industrial and civil grouting tasks without requiring multiple layers or specialised techniques.
• >85 MPa ultimate compressive strength (Flow consistency): The long-term strength exceeds the demands of most heavy-duty applications, providing durable and reliable support for machine bases, bridge bearings, and crane rails for the lifespan of the structure.

What it's like to use

This grout requires only the addition of clean water and mechanical mixing for a smooth, flowable consistency. It must be placed within 10 minutes of mixing to fully benefit from its expansion properties. For larger or thicker sections beyond 120mm, it can be extended with well-graded, silt-free aggregate like RLA EPILOX FILLERS F4, ensuring minimal heat build-up. Proper surface preparation, including pre-soaking of the foundation, is crucial, as is continuous pouring from one side to eliminate air voids. After placement, exposed areas need thorough curing with an RLA liquid curing membrane, continuous water, or wet hessian to achieve optimal performance.

Where this product excels

• Grouting heavy-duty machine base plates: For critical equipment that cannot sustain extended downtime, its high early strength and shrinkage compensation provide rapid, stable support against dynamic operational loads.
• Rapid reinstatement of precast elements: Accelerates construction schedules for precast concrete components, allowing for quicker removal of bracing and faster follow-on trades due to its fast strength gain.
• Anchoring bolt holes in structural applications: The exceptional flow characteristics ensure complete filling of bolt holes, forming a high-strength, void-free bond essential for securing structural steel and other heavy fixings.
• Bridge bearing pads and crane rail plates: Provides superior load-bearing capacity and resistance to impact and vibration, ensuring the long-term durability and safety of vital infrastructure.

Choose this when

• When high early strength is critical for rapid return to service of equipment or structures.
• For grouting heavy machinery, bridge bearing pads, or crane rails that require robust support against dynamic loads and vibrations.
• When specifying a Class C grout that provides dual-stage shrinkage compensation for long-term stability.
• For applications requiring exceptional flow characteristics to ensure complete fill in tight or complex spaces.

Don't use this when

• Not for: Sub-10mm repairs; this grout is designed for thicknesses from 10mm up to 120mm in a single pour.
• Not for: Mixing with colloidal mixers; mechanical or high-shear vane mixers are required for proper activation and consistency.
• Not for: Applications where a pre-mixed liquid requiring no water is specified; this is a powder requiring on-site water addition.
• Not for: Ignoring temperature guidelines; cold temperatures require warm mixing water and extended formwork, while hot conditions necessitate cool water and storage.