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.
Explore the range: See Concrete Repair Products, or compare structural and non-shrink options in Construction Grouts & Repair Mortars.
What class is Penatech HES Grout?
It is a Class C high-early-strength, shrinkage-compensated cementitious grout.
How quickly can equipment be reinstated?
The current TDS states 24 hours. RLA’s product webpage currently says 2 hours, so the TDS is being treated as the technical authority.
What thickness can it be placed at?
The current TDS states 10mm to 120mm in a single application.
What early strength does it reach?
For flow consistency, the current TDS reports more than 35MPa compressive strength at 2 hours.
| Property | Value |
|---|---|
| Shelf Life | 12 months |
| 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 |
| 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) |
| Coverage | 2.0 |
| Expansion | 1-2% Plastic State |
Here are some common examples on where RLA Penatech HES Grout used by our customers.
