For civil engineering and heavy infrastructure installations where equipment downtime must be minimised, RLA Penatech HES Grout provides rapid strength development on concrete substrates. Tested and compliant with AS1012 and AS1478 as a Class C grout, this dual-expansion, shrinkage-compensated formula allows structural loads, crane rail plates, bridge bearing pads, and heavy machinery base plates to be fully reinstated in 24 hours.
Penatech HES Grout utilises a blend of Portland cement, graded fillers, and chemical additives to control expansion across both the plastic and hardened states. In the plastic state, it expands by 1% to 2% within the first 5 to 25 minutes of mixing to counteract early settlement. It continues to expand during hardening, compensating for long-term drying shrinkage to maintain complete contact under high-load base plates and within precast joints. The non-metallic formulation is iron-free, preventing rust staining in exposed exterior applications.
For quantities up to 40kg, a slow-speed drill fitted with a high-shear mixer must be used. Larger quantities require a high-shear vane mixer. Do not use a colloidal impeller mixer. Add the powder slowly to pre-measured clean water and mix continuously for 5 minutes to achieve a smooth, even consistency.
Water requirements per 20kg bag:
Clean concrete substrates thoroughly to remove oil, grease, and laitance by scabbling or water blasting. Flood the foundation area with fresh water for several hours to pre-soak, removing all free standing water from bolt holes and pockets immediately before pouring. Grout must be poured continuously from one side of the void to prevent air entrapment. Always grout bolt pockets before grouting the main gap beneath the base plate.
For pours thicker than 120mm, Penatech HES Grout must be filled out with a well-graded, silt-free aggregate, such as Epilox Fillers F4 added at 10kg per 20kg bag, to control heat build-up. Note that adding aggregate creates a heat sink that will slightly retard the grout set and slow early strength development during the first few hours.
Yes, RLA Penatech HES Grout is specifically designed for heavy duty support grouting, including high-load machine base plates. Its high early and ultimate compressive strengths, reaching over 60 MPa at 24 hours (flow consistency), ensure rapid load bearing and minimal equipment downtime.
The application temperature range is between 5°C and 30°C. For temperatures below 10°C, warm mixing water (30-40°C) is recommended, and formwork should remain for at least 36 hours. Above 35°C, use cool mixing water (below 20°C) and keep bags out of direct sun.
Yes, it has been tested to and complies with AS1012 and AS1478 for Class C grout. This provides assurance for use in specified cementitious grouting applications requiring high early strength.
Equipment and machinery can typically be reinstated after 24 hours. The grout develops over 60 MPa compressive strength (flow consistency) within this timeframe, significantly minimising downtime on site.
It can be placed up to 120mm in a single pour as an under-plate grout. For thicker sections, well-graded, silt-free aggregate such as EPILOX FILLERS F4 must be added at 10kg per 20kg bag to minimise heat build-up. Adding excess aggregate will affect water demand and ultimate strength.
| Application | Key benefit | Primary trades |
|---|---|---|
| Heavy duty support for machine base plates | Achieves over 60 MPa compressive strength in 24 hours (flow consistency), allowing rapid equipment reinstatement and reducing downtime. Dual-stage expansion ensures full contact and load transfer. | Civil contractors, Industrial maintenance, Heavy industry |
| Precast grouting applications | Rapid strength gain and AS1478 Class C compliance ensures structural integrity and faster project turnaround. Flowable consistency ensures complete void filling. | Precast manufacturers, Structural contractors |
| Anchoring bolt holes | High bond strength (>9.5 MPa slant shear) and 0% bleed provide reliable, non-shrink anchorage for critical fixings. | Civil engineers, Steel fixers, Riggers |
| Bridge bearing pads and crane rail plates | High ultimate compressive strength (over 85 MPa at 28 days) and resistance to impact and thermal cycling provide durable, long-term support for dynamic loads. | Infrastructure contractors, Rail construction |
| Rapid reinstatement of equipment or structures | Allows for commissioning or loading within 24 hours due to high early strength development. Minimises operational interruptions and site delays. | Plant managers, Maintenance engineers |
| Grouting cavities, gaps, and recesses | Exceptional flow characteristics and controlled dual-stage expansion ensure complete filling of complex voids without shrinkage or bleed, preventing future issues. | General builders, Concrete repairers |
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.
Signal Word: Danger
Wear safety shoes, overalls, gloves, chemical goggles, and a respirator. If inhalation risk exists, use an organic vapour/particulate respirator meeting AS/NZS 1715 and AS/NZS 1716. Ensure adequate ventilation.
Store locked up in a cool, dry, well-ventilated place, out of direct sunlight. Keep containers tightly closed when not in use. Store away from foodstuffs and incompatible materials. Dispose of contents and container in accordance with local, regional, national, and international regulations.
Proper surface preparation is essential for bond and performance. This guide outlines key steps for common substrates.
Surface prep: Remove all oil, grease, and loose material. Cut back defective or laitance-affected concrete to a sound base. Scabble or water blast to achieve a mechanical key. Ensure bolt holes and fixing pockets are blown clean of debris. Remove any cracked or weakened concrete.
Primer: Not required. The concrete foundation must be presoaked for several hours before grouting, and all free water removed immediately prior to application.
Surface prep: The base plate must be clean and free from grease, oil, or scale. Provide air relief holes to vent any isolated high spots, ensuring continuous grout flow and full contact.
Primer: Not required.
| Property | Value |
|---|---|
| Colour | Lightgrey |
| Shelf Life | 12 months |
| Packaging | 20kg Poly-lined Bags |
| Application Temperature | Min 5ºC - Max 30ºC |
| Coverage Per M² Per mm | 2.0 Kg/m²/mm |
| Expansion Characteristics Plastic State | 1-2% |
| Time For Expansion Start | 5 mins |
| Time For Expansion Finish | 25 mins |
| Bleed | 0% |
| Yield Per 20kg Bag Flow | 10.3 litres |
| Yield Per 20kg Bag Fluid | 11 litres |
| No. Bags Per Cubic Meter Flow | 97 |
| No. Bags Per Cubic Meter Fluid | 91 |
| Mixed Grout Density | 2220 kg/m³ |
| Initial Set Time At 20°C 50%RH Flow | 20 minutes |
| Initial Set Time At 20°C 50%RH Fluid | 25 minutes |
| Final Set Time At 20°C 50%RH Flow | 35 minutes |
| Final Set Time At 20°C 50%RH Fluid | 40 minutes |
| Flexural Strength At 20°C 1 Day Flow | 39.93 MPa (AS1012.11) |
| Flexural Strength At 20°C 1 Day Fluid | 20.32 MPa (AS1012.11) |
| Flexural Strength At 20°C 7 Days Flow | 70.81 MPa (AS1012.11) |
| Flexural Strength At 20°C 7 Days Fluid | 64.29 MPa (AS1012.11) |
| Flexural Strength At 20°C 28 Days Flow | 87.03 MPa (AS1012.11) |
| Flexural Strength At 20°C 28 Days Fluid | 66.32 MPa (AS1012.11) |
| Compressive Strength At 20°C 2 Hours Flow | >35 MPa (AS1012.9 / AS1478.2) |
| Compressive Strength At 20°C 2 Hours Fluid | >25 MPa (AS1012.9 / AS1478.2) |
| Compressive Strength At 20°C 4 Hours Flow | >45 MPa (AS1012.9 / AS1478.2) |
| Compressive Strength At 20°C 4 Hours Fluid | >30 MPa (AS1012.9 / AS1478.2) |
| Compressive Strength At 20°C 8 Hours Flow | >50 MPa (AS1012.9 / AS1478.2) |
| Compressive Strength At 20°C 8 Hours Fluid | >36 MPa (AS1012.9 / AS1478.2) |
| Compressive Strength At 20°C 24 Hours Flow | >60 MPa (AS1012.9 / AS1478.2) |
| Compressive Strength At 20°C 24 Hours Fluid | >44 MPa (AS1012.9 / AS1478.2) |
| Compressive Strength At 20°C 3 Days Flow | >65 MPa (AS1012.9 / AS1478.2) |
| Compressive Strength At 20°C 3 Days Fluid | >48 MPa (AS1012.9 / AS1478.2) |
| Compressive Strength At 20°C 7 Days Flow | >75 MPa (AS1012.9 / AS1478.2) |
| Compressive Strength At 20°C 7 Days Fluid | >50 MPa (AS1012.9 / AS1478.2) |
| Compressive Strength At 20°C 28 Days Flow | >85 MPa (AS1012.9 / AS1478.2) |
| Compressive Strength At 20°C 28 Days Fluid | >65 MPa (AS1012.9 / AS1478.2) |
| Bond Strength Slant Shear Flow | >9.5 MPa (ASTM 882-1987) |
| Bond Strength Slant Shear Fluid | >10 MPa (ASTM 882-1987) |
Here are some common examples on where RLA Penatech HES Grout used by our customers.
