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SikaGrout HES is a rapid-setting, high-early-strength cementitious grout for supporting equipment and structural elements where an early return to service matters. This ready-mixed Class C shrinkage-compensated grout can be mixed to a flowable or trowellable consistency for appropriately prepared concrete and steel interfaces.
Where to use SikaGrout HES
Use it beneath machine base plates, around compatible anchors and starter bars, beneath bridge bearing pads, and in precast concrete joints, cavities and recesses. The grout is non-corrosive to steel and iron and is designed to maintain contact beneath properly supported elements.
Strength and working time
At the stated test conditions, compressive strength develops to approximately 15 MPa after 2 hours and 65 MPa after 28 days. Working time is around 20 minutes at 23°C, so prepare the area and equipment before mixing. Placement thickness is generally 10–150 mm per application at 23°C.
Before you grout
Mechanically mix complete 20 kg bags; do not hand-mix, use part bags, add water to grout that has stiffened or vibrate the placed grout. Allow the specified water addition for the required consistency and protect and cure the placed grout as directed. Refer to the complete product instructions for water ratios, placement and curing conditions.
Explore our construction grouts and repair mortars for alternative installation and working-time requirements.
What is SikaGrout HES used for?
Machine base plates, anchoring, starter bars, bridge bearing pads, precast panel grouting, and cavities, gaps, and recesses where rapid strength and return to service are required.
How fast does SikaGrout HES gain strength?
It sets fast and builds high early strength, so equipment can go back to work sooner. The full strength timeline is in the technical specifications.
How much water do I add?
Flowable: 3.2 to 3.5 litres per 20 kg bag. Trowellable: 2.5 to 2.8 litres per 20 kg bag. Pot life is about 20 minutes at 23°C.
- Suits: Concrete structures and elements for machine base plates, anchoring, starter bars, bridge bearing pads, precast panel grouting, and cavities, gaps, and recesses. Steel and iron fixings: the grout is non-corrosive.
- Prepare: Surfaces must be sound and clean. Follow the product instructions before placement.
SikaGrout® HES 20kg Physical Properties
| Property | Value |
|---|---|
| Classification | Class C shrinkage compensated grout |
| Colour | Grey powder |
| Packaging | 20 kg bag |
| Density | ~2,200 kg/m³ (dependent on water addition rate) |
| Shelf Life | 9 months |
| Storage Conditions | Stored dry in unopened original containers, protected from direct sunlight and frost |
| Maximum Grain Size | ~2.0 mm (pumping) |
| Compressive Strength 2 Hours | ~15 MPa |
| Compressive Strength 4 Hours | ~24 MPa |
| Compressive Strength 1 Day | ~30 MPa |
| Compressive Strength 3 Days | ~40 MPa |
| Compressive Strength 7 Days | ~45 MPa |
| Compressive Strength | ~65 MPa (28 days) |
| Compressive Strength Conditions | 23°C / 50% r.h.; 50mm x 50mm cube at flowable consistency |
| Electrical Resistivity 7 Days | ~9,000 Ω.cm |
| Electrical Resistivity 28 Days | ~17,000 Ω.cm |
| Electrical Resistivity 56 Days | ~22,000 Ω.cm |
| Electrical Resistivity 90 Days | ~25,000 Ω.cm |
| Layer Thickness | min. 10 mm / max. 150 mm at 23°C |
| Flowability | ~70 sec (Flow Cone, flowable consistency, AS 1478.2:2005) |
| Mixing Ratio Flowable | 3.2 to 3.5 litres water per 20 kg bag |
| Mixing Ratio Trowellable | 2.5 to 2.8 litres water per 20 kg bag |
| Pot Life | ~20 minutes at 23°C |
| Initial Set Time | ~25 mins at 23°C |
| Final Set Time | ~30 mins at 23°C |
| Yield per 20kg Bag Trowellable | ~10.3 litres |
| Yield per 20kg Bag Flowable | ~10.7 litres |
| Bags per m³ Trowellable | ~97 |
| Bags per m³ Flowable | ~94 |
| Certification | Department of Main Roads Qld (TMR) 2019, Product Index for Bridges and Other Structures, Section 5, 5.33 Repair Materials (Concrete) - Grouts |