For structural concrete applications subject to dynamic loads and continuous vibrations, RLA Penatech HS Grout provides a high-strength, precision Class C cementitious grouting system. It is formulated to achieve non-shrink dual expansion, compensating for volume loss in both the plastic and hardened states to maintain full bearing contact under machine base plates, bridge bearing pads, and crane rail sole plates.
Penatech HS Grout is a chloride-free cementitious system designed for gap depths from 10mm up to 150mm in a single application. The gaseous expansion mechanism begins after 5 minutes and completes within 25 minutes of mixing, offsetting shrinkage before and during the curing phase. It contains non-metallic wire content to eliminate rust staining on exposed concrete faces. When mixed to a flowable consistency, it maintains excellent flow retention to completely fill deep cavities, core holes, and pre-cast concrete panel gaps without bleeding or segregation.
Substrate preparation: Concrete substrates must be clean, sound, and free of dust, oil, grease, curing compounds, and contaminants. Bolt holes and anchor points must be completely free of water. All prepared concrete areas must be saturated with clean water for 4 hours before grouting to control porosity. Remove all excess water, puddles, and standing water from holes immediately before placement.
Formwork: Formwork must be leakproof and watertight. Seal the base of the formwork using foam rubber strips, polyurethane, or silicone. Construct the formwork to maintain a grout head on the pour side above the level of the underside of the base plate to facilitate gravity flow. Coat the forms with a release agent or form oil before pouring.
Placement: Pour mixed flowable grout continuously from one side using a header box to maintain head pressure and prevent air entrapment. For large-volume pumping, use a positive displacement pump and a forced-action mixer. Pump from the bottom upwards to fill voids completely. Ensure bleed or venting holes are present in the formwork or base plate to prevent pressure build-up.
Curing: Cure all exposed grout immediately after application. Cover with plastic sheeting, wet hessian, or apply a wet liquid curing compound from the RLA Curecon range to ensure full strength development.
Yes, this grout is specifically formulated for critical applications like machine base plates, especially where dynamic loads and continuous vibrations are present. Its high early and ultimate compressive strength, combined with non-shrink properties, ensures stable, long-term support.
Application outside 5°C to 30°C can impact performance. Below 10°C, setting time extends, and early strength gain is reduced. Above 30°C, setting time shortens significantly, reducing placement time and risking cracking or delamination. Condition materials and water to 20-25°C for best results.
Yes, RLA Penatech HS Grout complies with the US Corps of Engineer’s Specification CRDC 621-82A and ASTM C1107-91 (Type C). It features dual expansion to compensate for shrinkage in both plastic and hardened states, ensuring consistent volume.
No, hand mixing is not recommended. Mechanical mixing with a high-shear or suitable drum mixer is required to achieve a consistent, homogeneous mix. For smaller batches, an electric drill with a spiral paddle at 500-600 rpm is suitable.
| Application | Key benefit | Primary trades |
|---|---|---|
| Machine base plates | Ensures precise, stable support under dynamic loads and continuous vibration with non-shrink properties. | Civil contractors, industrial engineers |
| Bridge bearing pads | Provides high ultimate strength and dual expansion to prevent settlement and maintain structural integrity. | Civil contractors, structural engineers |
| Crane rail sole plates | Withstands continuous vibration and provides high impact and thermal resistance for heavy industrial use. | Industrial construction, maintenance teams |
| Pre-cast concrete sections/panels | Fills gaps from 10mm to 150mm with structural continuity and high early strength for efficient sequencing. | Pre-cast manufacturers, commercial builders |
| Anchor bolt fillings | Non-shrink void filling secures critical fixings, resisting pull-out and ensuring long-term stability. | All trades requiring structural fixing |
| Filling in core holes, cavities, gaps, and base infills | Achieves full void contact with exceptional flow characteristics and 0% bleed, preventing hidden defects. | Concrete repairers, builders |
Clean all substrates of contaminants. Presoak for 4 hours and remove all standing water prior to application.
Water saturation followed by air drying surface to saturated-surface-dry (SSD) condition before grout placement.
Signal Word: Danger
Wear safety shoes, overalls, gloves (suitable for intermittent contact), chemical goggles, and a respirator. If inhalation risk exists, use an organic vapour/particulate respirator meeting AS/NZS 1715 and AS/NZS 1716 standards.
Use only outdoors or in a well-ventilated area. Ensure adequate ventilation to maintain air concentrations below occupational exposure standards. Avoid generating and inhaling dust.
Store in a cool, dry, well-ventilated place, away from direct sunlight, foodstuffs, and incompatible materials. Store away from sources of heat or ignition. Store locked up. Keep containers closed and standing upright when not in use. Dispose of contents and container according to local, regional, national, and international regulations.
Correct surface preparation and presoaking are critical for RLA Penatech HS Grout to achieve optimal bond strength and prevent premature drying.
Surface prep: Ensure the substrate is clean, sound, and free from dust, oil, grease, curing compounds, or any foreign matter that could affect the bond. Bolt holes and anchor points must be clean and free of water.
Primer: Not required. The product is designed to bond directly to properly prepared and presoaked concrete.
Presoaking: Required. All prepared areas must be saturated with water for 4 hours before grouting to reduce substrate porosity. Before grouting, ensure all excess water is removed; holes must be free from water, and no puddles should be present. Provide bleed holes or venting holes under base plates to prevent pressure build-up.
| Property | Value |
|---|---|
| Colour | Light Grey Powder, when mixed |
| Application Temperature | Min 5°C - Max 30°C |
| Coverage | 2.0 kg/m²/mm |
| Time for Expansion Start | 5 mins |
| Time for Expansion Finish | 25 mins |
| Bleed | 0% |
| Shelf Life | 9 months |
| Yield per 20kg bag Trowellable | 10.2 litres |
| Yield per 20kg bag Flowable | 11 litres |
| Water per 20kg bag Trowellable | 2.8 - 3.2 litres |
| Water per 20kg bag Flowable | 3.5 - 4.0 litres |
| Bags per cubic meter Trowellable | 98 bags |
| Bags per cubic meter Flowable | 91 bags |
| Fresh Mixed Density | 2220 kg/m³ |
| Initial Set Time @ 20°C Trowellable | 2 Hours |
| Initial Set Time @ 20°C Flowable | 2.5 Hours |
| Final Set Time @ 20°C Trowellable | 3.5 Hours |
| Final Set Time @ 20°C Flowable | 4 Hours |
| Flexural Strength 1 day Trowellable | >4.0 MPa |
| Flexural Strength 1 day Flowable | >3.9 MPa |
| Flexural Strength 3 days Trowellable | >5.5 MPa |
| Flexural Strength 3 days Flowable | >6.5 MPa |
| Flexural Strength 7 days Trowellable | >8.82 MPa |
| Flexural Strength 7 days Flowable | >7.0 MPa |
| Flexural Strength 28 days Trowellable | >9.8 MPa |
| Flexural Strength 28 days Flowable | >9.5 MPa |
| Compressive Strength 1 day Trowellable | >35 MPa |
| Compressive Strength 1 day Flowable | >25 MPa |
| Compressive Strength 3 days Trowellable | >65 MPa |
| Compressive Strength 3 days Flowable | >48 MPa |
| Compressive Strength 7 days Trowellable | >75 MPa |
| Compressive Strength 7 days Flowable | >50 MPa |
| Compressive Strength 28 days Trowellable | >85 MPa |
| Compressive Strength 28 days Flowable | >65 MPa |
| Bond Strength 28 days Trowellable | >9.5 MPa |
| Bond Strength 28 days Flowable | >10 MPa |
Here are some common examples on where RLA Penatech HS Grout used by our customers.
