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Penatech HES Grout is a high-performance, flowable, shrinkage-compensated Class C grout engineered for critical applications where rapid strength gain is essential. Comprising a precise blend of Portland cement, graded fillers, and advanced chemical additives, this grout delivers exceptional early compressive strength while ensuring controlled expansion in both its plastic and hardened states. This dual-stage expansion guarantees a permanent, void-free, high-contact bearing surface, eliminating the risk of settlement or vibration issues down the line.
Supplied as a ready-to-use powder, Penatech HES Grout requires only the addition of clean water to produce a consistent, non-shrink grout. It’s the reliable solution for minimising project downtime, allowing heavy machinery and structural elements to be returned to service in as little as 24 hours. Fully tested and compliant with AS 1012 and AS 1478, it provides the certified performance that professionals depend on for structural integrity and long-term durability.
Potential Outcome: Significantly delayed strength gain and improper curing, which can compromise the grout's final compressive strength and long-term durability, leading to structural failure.
RLA Best Practice: When the ambient temperature is 5°C or below, it's essential to use warm water (30-40°C) for mixing to accelerate the chemical reaction. Additionally, the formwork must be kept in place for at least 36 hours to protect the grout during its critical early curing phase.
Ensuring complete, void-free support under high-load, high-vibration machinery to maintain critical alignment and prevent premature equipment failure. Meeting strict engineering specifications for compressive strength (AS 1478) and long-term durability is non-negotiable.
Mix HES Grout to a flowable consistency (2.5-2.8L water per 20kg bag) to ensure it flows easily across the entire base plate. The dual-stage expansion guarantees a permanent, high-contact bearing surface. Achieving over 60 MPa in 24 hours allows for rapid commissioning of equipment, saving valuable time.
Maintain a sufficient fluid head and use a formwork gap of approximately 150mm on the pouring side to ensure continuous, positive flow across the shortest distance. Always provide air relief holes at isolated high spots to prevent air entrapment.
Quickly and reliably setting precast concrete elements where rapid strength gain is critical to remove bracing, ensure stability, and maintain project momentum. Inconsistent grout performance can lead to significant delays and safety risks.
The rapid set time (final set in 35 minutes for flow consistency) and high early strength development allow for faster turnaround and removal of supports. As a simple "just add water" mix, HES Grout provides consistent, repeatable performance, ensuring every panel is set to the same high standard.
Proper substrate preparation is key. Ensure the foundation is thoroughly cleaned and pre-soaked with water for several hours. Remove all free-standing water immediately before pouring to achieve a tenacious, permanent bond to the concrete substrate.
You can pour Penatech HES Grout up to 120mm thick in a single layer for most under-plate applications. For thicker sections, you must add a well-graded, silt-free aggregate like EPILOX FILLERS F4 to control the heat generated during curing and ensure structural stability.
Thanks to its rapid strength gain, equipment and machinery can typically be reinstated after just 24 hours at 20°C. The grout achieves a compressive strength of over 60 MPa in this timeframe (at flow consistency), which is more than sufficient for most heavy-duty applications and helps minimise costly downtime.
It means the grout is engineered to counteract the natural shrinkage that occurs as cement cures. It expands slightly in both its wet (plastic) and hardened states to ensure a permanent, tight fit with no gaps. This provides a total-contact bearing surface, preventing movement and ensuring long-term structural integrity.
| Application / Use Case | Key Benefit | Primary Trades |
|---|---|---|
| Heavy duty support under machine base plates | High compressive strength and non-shrink properties provide permanent, stable support under dynamic loads. | Engineers, Mechanical Fitters, Remedial Contractors |
| Precast grouting applications | Rapid strength gain allows for faster removal of bracing and accelerates construction schedules. | Precast Installers, Builders |
| Anchoring bolt holes | Excellent flow and expansion ensure a complete, high-strength bond for secure anchoring. | Structural Steel Erectors, Builders |
| Bridge bearing pads and crane rail plates | Superior load-bearing capacity and resistance to impact and vibration ensure long-term durability. | Civil Contractors, Engineers |
| Rapid reinstatement of equipment | Equipment can be back in service after 24 hours, dramatically reducing costly operational downtime. | Maintenance Crews, Industrial Contractors |
Ensure the foundation is sound, clean, and free of contaminants. Pre-soak the concrete for several hours, then remove all standing water. Construct leak-proof formwork around the base plate, ensuring it is braced to withstand the grout pressure.
Generally, allow a gap of 150mm on the pouring side and 50mm on the opposite side to maintain a fluid head.
Use a mechanically powered grout mixer or a slow-speed drill with a high-shear paddle. Do not use a colloidal mixer. Accurately measure the required clean water into the mixer first.
Slowly add the entire 20kg bag of Penatech HES Grout to the water while continuously mixing. Mix for a full 5 minutes until a smooth, even, and lump-free consistency is achieved.
Continuous grout flow is essential. Ensure sufficient material is mixed and ready before starting the pour. Pour from one side of the void only to eliminate air entrapment.
Always wear protective gloves (PVC suitable), safety shoes, overalls, and chemical goggles or a face shield. The product is a cement-based powder and is hazardous.
Use only outdoors or in a well-ventilated area. Avoid breathing dust. If inhalation risk exists, wear a P2-rated particulate respirator meeting AS/NZS 1715 & 1716 standards.
Refer to the Safety Data Sheet (SDS) for complete information. If medical advice is needed, have the product container or label at hand.
The substrate surface must be structurally sound and completely free from oil, grease, scale, or any loosely adherent material. If the concrete surface has laitance, it must be cut back to a sound base using methods like scabbling or high-pressure water blasting to provide a mechanical key. All bolt holes and fixing pockets must be blown clean of any dust or debris.
The cleaned foundation area must be flooded with fresh water for several hours before grouting. Immediately prior to placing the grout, remove any free-standing water. The surface should be saturated but surface-dry (SSD) to prevent the substrate from drawing water out of the grout mix prematurely.
Here are some common examples on where RLA Penatech HES Grout used by our customers.
| Property | Value |
|---|---|
| Colour | Light grey |
| Density | Approx. 2220 kg/m³ |
| Consistency | 11 litres per 20 kg bag |
| Compressive Strength | >65 MPa |
| Flexural Strength | 87.03 MPa |
| Bond Strength | >9.5 MPa |
| Initial Cure | 25 minutes |
| Full Cure | 40 minutes |
| Application Temperature | 5°C to 30°C |
| Coverage Rate | 2.0 kg/m²/mm |
| Classification | Shrinkage Compensated Class C Grout |
| Certifications | AS 1012, AS 1478 |
| Standards | 3.2 - 3.5 litres per 20 kg bag |
| Packaging | 20 kg Poly-lined Bags |
| Shelf Life | 12 months |
| Bleed | 0% |
| Expansion Characteristics | 1-2% in Plastic State |
| Time For Expansion | Starts at 5 mins, Finishes at 25 mins |
