Sika SikaGrout 214-11
Shrinkage-compensated, free-flowing cementitious grout for precision base-plate and anchor grouting, engineered for uninterrupted flow and 60 N/mm2 strength.
What is it?
A pre-bagged, cement-based precision grout that only needs water added on site. It is shrinkage-compensated, so it holds its volume rather than pulling away from the plate or pocket it fills.
Where is it used?
Under machine foundations, structural steel base plates, crane and rail beds, bridge bearings, anchor bolts and cavities where a dense, gap-filling grout is needed.
Why use it?
It self-levels and flows under plates without vibration, develops around 25 N/mm2 in a day and 60 N/mm2 at 28 days, and expands slightly to keep full contact and load transfer.
How is it applied?
Gauge water first, add powder, mix mechanically for three minutes to a smooth slurry, then pour continuously from one side of the plate so trapped air escapes ahead of the grout front.
About Sika SikaGrout 214-11
SikaGrout 214-11 is Sika’s workhorse precision grout for situations where a base plate, machine or anchor has to sit on a dense, fully bearing bed with no voids. It arrives as a 25 kg factory-blended bag of Portland cement, graded fillers and shrinkage-compensating agents, so the only site variable is how much water you add. That single-component simplicity is deliberate: it removes the batching errors that plague site-mixed sand-cement grouts, and it lets a crew produce consistent, repeatable results pour after pour, whether the job is a single pump skid or a full turbine hall.
What sets it apart from ordinary bedding mortar is behaviour in the plastic and hardened states. A plain cement grout shrinks as it cures and can lose contact with the underside of a plate, leaving the load riding on high spots instead of the full footprint. SikaGrout 214-11 is formulated to compensate for that movement, giving a slight positive expansion of at least 0.1 percent while it is still plastic. Combined with a no-bleed, self-levelling mix, that means the hardened grout stays in intimate contact with both the concrete below and the steel above, which is exactly what a structural engineer wants to see under a dynamically loaded machine.
The technical insight
The performance comes down to controlled expansion versus natural shrinkage. As any cementitious system hydrates it tends to contract, and a rigid, already-seated plate cannot follow that movement, so a gap opens up. SikaGrout 214-11 carries a blend of expansion and plasticising agents that generate a small, controlled volume increase in the fresh state, offsetting that early contraction so the grout keeps pushing up against the plate rather than shrinking away. The plasticiser lets it flow at a low water demand, a mix ratio of roughly 1 part water to 6.5 to 7.5 parts powder, which matters because every extra litre of water you do not add is strength and durability you keep. Low water also suppresses bleeding, so solids do not settle out and leave a weak, water-rich layer directly under the plate. The result is a homogeneous bed that carries load uniformly, resists the vibration and impact of running machinery, and reaches the strengths the designer specified.
Where it is used
- Grouting under compressor, pump, turbine and generator base plates where a fully bearing, vibration-resistant bed is essential
- Structural steel stanchion and column base-plate grouting on industrial and commercial frames
- Anchor-bolt and holding-down bolt pocket grouting
- Bridge bearing and bearing-plate bedding
- Crane rail and machine rail beds
- Filling cavities, gaps and recesses in concrete
- High-strength localised repair of concrete sections
- Precast column and panel connection grouting
Key advantages
- Only water is added on site, so mixing is fast and results stay consistent from batch to batch
- Shrinkage-compensated with a positive expansion of at least 0.1 percent, keeping full contact under the plate
- Self-levelling, free-flowing consistency that fills under plates without mechanical compaction
- Rapid strength gain, around 25 N/mm2 at one day, reaching 60 N/mm2 at 28 days
- No bleeding, so no weak water-rich layer forms beneath the load
- Non-toxic, non-corrosive and chloride-free, suitable next to embedded steel
- Can be poured or placed with a suitable grout pump for larger or less accessible pours
- Extendable with clean aggregate for thick sections and large-volume cavities
Limitations & considerations
- Minimum grout gap is 10 mm; for very thin joints a specialised thin-section grout is more appropriate
- Below 20 degrees C setting and strength gain slow markedly, and application must stay above 10 degrees C
- For sections thicker than about 60 mm, aggregate extension and/or cold gauging water is needed to control heat build-up
- Aggregate extension of 50 to 100 percent is only for large cavities and requires the gap to be at least three times the maximum aggregate size
- Curing discipline matters; exposed grout must be kept moist for at least three days or surface strength and appearance suffer
- Only water demand is adjustable; over-watering to gain flow will cost strength and invite bleeding
Selection & best practice
Pre-gauge the water into the mixing vessel and add the powder to it, not the other way round, then mix mechanically with a low-speed drill and paddle (max 500 rpm) for at least three minutes until the slurry is smooth and lump-free. Saturate absorbent concrete substrates well in advance but leave no standing water, and make sure metal surfaces are free of scale, rust, oil and grease. Set up firm, watertight formwork with a head box on one side. Pour continuously from that single side so the advancing grout front drives entrapped air out ahead of it; never pour from opposite sides at once. Maintain a constant hydrostatic head to keep the flow uninterrupted, and use steel rods or a chain to confirm the cavity has filled. Apply as quickly as practical after mixing to capture the expansion, then cure the exposed surface for at least three days with wet hessian or a curing compound.
Specifications
| Type | Shrinkage-compensated, pumpable cementitious grout |
| Packaging | 25 kg bag |
| Appearance | Concrete-grey powder |
| Compressive strength (ASTM C349/C109) | 1 day 25 N/mm2, 3 days 41 N/mm2, 7 days 52 N/mm2, 28 days 60 N/mm2 (all minimum) |
| Expansion (ASTM C940) | at least 0.1 percent at 3 h, 27 degrees C |
| Mixing ratio | 1 : 0.13-0.15 powder to water by weight (approx. 3.25-3.75 L water per 25 kg bag) |
| Yield | approx. 13.10 litres per bag; approx. 76 bags per m3 |
| Flowability (ASTM C230) | Flow table spread 25-32 cm |
| Setting time (ASTM C403) | Initial at least 5 h, final up to 12 h at 27 degrees C |
| Minimum gap / working temperature | 10 mm minimum gap; ambient 10-40 degrees C |
Industry use cases
Power and process plants
Bedding compressors, pumps, turbines and generators where continuous vibration demands a dense, non-shrink bed that keeps full plate contact under dynamic load.
Structural steel fabrication
Grouting stanchion and column base plates on industrial sheds and commercial frames, transferring column loads evenly into the foundation.
Bridges and infrastructure
Bedding bridge bearings and bearing plates, and filling anchor pockets, where reliable load transfer and durability are critical.
Material handling and cranes
Grouting crane rail and machine rail beds so rails stay true and fully supported under repeated rolling loads.
Precast and repair
Filling connection pockets on precast columns and panels, and carrying out high-strength localised concrete repairs.
Frequently asked questions
How much water do I add to a 25 kg bag?
What compressive strength does it reach?
What is the minimum and maximum grout thickness?
How many bags do I need per cubic metre?
Can it be pumped?
Is it safe against embedded steel and rebar?
How we position Sika SikaGrout 214-11
SikaGrout 214-11 sits in the general-purpose to high-strength precision-grout band of the Sika range. Where a job needs faster early strength or a flowable epoxy bed for high-vibration or chemically aggressive duty, look at Sika’s higher-grade cementitious grouts and the SikaGrout epoxy-based systems, and pair the pour with SikaGrout formwork detailing and Antisol E curing compound to protect the exposed surface. Because Space Arc supplies several brands, we can match this against equivalent non-shrink grouts from our other partners such as MC-Bauchemie and Master Builders Solutions when a project specification calls out a particular manufacturer, and we will always advise the closest genuine equivalent rather than a forced substitute.
Fosroc Conbextra GP2 — Specifiers who standardise on Fosroc, or whose tender names Conbextra GP2, get a directly equivalent free-flow non-shrink grout in the same 60-65 N/mm2 strength class for the same base-plate and anchor duties.
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