Sika SikaGrout-3200 IN
A fatigue-certified, shrinkage-compensated cementitious precision grout engineered for onshore wind-tower base plates and other dynamically loaded connections that ordinary grouts cannot survive.
What is it?
A one-part, free-flowing, shrinkage-compensated cementitious precision grout from Sika, formulated with special cement, graded aggregates and additives, and fatigue-certified for cyclically loaded structural connections.
Where is it used?
Onshore steel and precast concrete wind-tower flange joints and base plates, plus turbine foundations, presses, compressors and other equipment that transmits heavy dynamic or impact loads.
Why use it?
It delivers up to 95 MPa at 28 degrees C in the standard 20 degrees C curing regime, controlled positive expansion for permanent contact, and a documented fatigue rating that most general-purpose grouts cannot claim.
How is it applied?
Mixed at roughly 11 to 12 percent water (about 2.75 to 3.0 litres per 25 kg bag), then poured or pumped from one side into pre-soaked, formed pockets in single lifts of 10 to 300 mm and cured under water for at least 72 hours.
About Sika SikaGrout-3200 IN
SikaGrout-3200 IN sits at the top of Sika’s cementitious grouting range in India, and it earns that position by solving a very specific problem: keeping a heavily loaded steel base plate in full, permanent contact with its concrete foundation under millions of load cycles. It is a factory pre-blended, one-part powder based on special cement, selected aggregates and additives, so the site crew only adds clean water. Once mixed it flows freely enough to travel under a large flange or base plate and fill every void, then hardens fast, gains high early and final strength, and compensates for drying shrinkage with a controlled positive expansion rather than pulling away from the plate as it cures.
What genuinely sets this grade apart from a general-purpose grout is its fatigue certification. Sika had SikaGrout-3200 IN independently fatigue-tested by Applus (Certificate No. 20/32300268-S) specifically for onshore wind-tower structural filling, where the connection sees relentless bending and vibration for decades. For Indian specifiers that means a grout you can put under a wind-turbine tower flange, a reciprocating compressor, a forging press or any other cyclically loaded machine base with published, third-party evidence behind it, not just a static compressive-strength number. It is supplied in 25 kg and 500 kg bags to suit both pocket grouting and large continuous pours.
The technical insight
The performance comes from a tightly controlled water demand and a graded aggregate skeleton. Sika publishes its strength figures at a water/powder ratio of just 0.115, which is why the cube results are so high: less mixing water means a denser matrix and less capillary porosity. At 20 degrees C the grout reaches at least 40 MPa in one day and at least 95 MPa at 28 days (ASTM C109, 50 mm cubes), climbing to 105 MPa at 28 degrees C when cured warm, which places it around the C80/95 concrete class under EN 206-1. Just as important for a load-bearing joint, the modulus of elasticity is roughly 38 GPa, close to that of structural concrete, so the grout and the foundation deform together instead of the grout becoming a soft or brittle interlayer under cyclic load. The shrinkage-compensation system produces more than 0.1 percent expansion within 24 hours (capped at 2 percent), which pre-stresses the grout against the plate and maintains the bearing contact that fatigue endurance depends on.
Where it is used
- Under-grouting flange joints and base plates of onshore steel and precast concrete wind towers
- Precision bedding of turbine-generator and high-speed rotating equipment foundations
- Grouting reciprocating and centrifugal compressor and pump base plates subject to vibration
- Foundations for forging presses, hammers and other high-impact machinery
- Deep single-lift pockets from 10 mm up to 300 mm where a free-flowing grout is required
- Pumped large-volume grouting of anchor-bolt pockets and structural cavities
- Fixing holding-down bolts and dowels in heavily loaded structural connections
- Repair and re-grouting of dynamically loaded machine bases where fatigue resistance matters
Key advantages
- Independently fatigue-certified (Applus No. 20/32300268-S) for cyclically loaded wind-tower connections
- Very high final strength, at least 95 MPa at 28 days and 20 degrees C, up to 105 MPa when cured at 35 degrees C
- Fast early strength, at least 40 MPa in one day at 20 degrees C, allowing quicker load application
- Shrinkage-compensated with more than 0.1 percent expansion for permanent base-plate contact
- Free-flowing and pumpable, so large volumes and long travel paths fill without vibration
- Single lifts from 10 mm up to 300 mm, reducing the need for multiple pours
- Modulus around 38 GPa matches structural concrete for compatible load transfer
- Factory pre-blended one-part powder for consistent, repeatable site batching
Limitations & considerations
- Strictly water-sensitive: the published strengths depend on a 0.115 water/powder ratio, and exceeding the maximum water will reduce strength and cause bleeding
- Not a repair mortar or a horizontal topping; it is a flowable grout for confined, formed pockets and joints
- Requires a minimum 12-hour substrate pre-soak and at least 72 hours of water curing, which adds programme time
- Placement is single-source only, poured or pumped from one side, and vibrating pokers must not be used
- Ambient and substrate temperatures must stay between +10 and +40 degrees C, so hot-weather pours need cool storage and cold mixing water
- Pot life is only about 60 minutes at 30 degrees C, so mixing and placing must be planned continuously with adequate equipment
Selection & best practice
Prepare a sound, clean substrate and saturate the concrete for a recommended 12 hours, removing all standing water so the surface is saturated-surface-dry before pouring. Seal the formwork against leakage and add a head box on the pour side. Batch the whole bag into pre-measured clean water at roughly 2.75 to 3.0 litres per 25 kg, mix for about 5 minutes with a spiral paddle, rest 1 to 2 minutes to release entrained air, then remix briefly; for large continuous pours use suitable grout-mixing equipment, never continuous mixers. Pour or pump from one side only to push air ahead of the grout, and do not use vibrating pokers. Never exceed the maximum water. Protect the exposed surface from sun and wind immediately, finish edges while green, and cure under water for at least 72 hours. In hot Indian conditions keep bags cool and use cold mixing water to control the exotherm and prevent cracking.
Specifications
| Chemical base | Special cement, selected aggregates and additives (one-part) |
| Compressive strength (ASTM C109, 20 C) | 1d greater than or equal to 40 MPa, 2d 70 MPa, 7d 90 MPa, 28d 95 MPa |
| Compressive strength (35 C) | 1d greater than or equal to 60 MPa, 28d greater than or equal to 105 MPa |
| Flexural strength (EN 196-1) | 1 day greater than or equal to 6 MPa; 28 days greater than or equal to 15 MPa |
| Modulus of elasticity | Approximately 38 GPa (EN 13412) |
| Expansion | Greater than 0.1 percent after 24 hours (max 2 percent) |
| Mixing water / yield | About 2.75 to 3.0 L per 25 kg (11-12 percent); 25 kg yields about 12 L |
| Layer thickness / pot life | 10 mm min to 300 mm max per lift; pot life about 60 min at 30 C |
| Packaging / shelf life | 25 kg and 500 kg bags; 6 months, stored dry at +5 to +30 C |
Industry use cases
Wind energy
Structural filling of flange joints and base plates on onshore steel and precast concrete wind towers, using the product’s documented fatigue certification for the cyclic tower loads.
Power generation
Precision bedding of turbine-generator sets and auxiliary rotating equipment where high modulus and non-shrink contact keep alignment stable under running vibration.
Heavy manufacturing
Grouting forging presses, hammers and compressors whose impact and dynamic loads demand a fatigue-resistant, high-strength bearing under the base plate.
Oil, gas and process plants
Under-grouting large pump and compressor skids where deep single-lift pockets and pumpable flow speed up mechanical installation.
Infrastructure and precast
High-load anchor-bolt pockets and precast structural connections that need early strength gain and reliable void-free filling.
Frequently asked questions
Is SikaGrout-3200 IN only for wind towers?
What strength does it actually reach?
How much water do I add per bag?
What thickness can I pour in one lift?
How long before it can take load and how do I cure it?
What pack sizes and shelf life should I plan for?
How we position Sika SikaGrout-3200 IN
SikaGrout-3200 IN is the fatigue-rated flagship of Sika’s cementitious grouting range for India, and it is the grade to specify when a connection is dynamically loaded. Where the duty is standard static machine grouting, a general-purpose Sika non-shrink grout is the more economical choice, and for chemically aggressive or vibration-plus-chemical exposure Sika’s epoxy grouts are the alternative worth reviewing. Within our wider portfolio the closest Fosroc counterpart is Conbextra HF, a high-flow non-shrink cementitious precision grout that fills base-plate gaps in a single pour; we stock both so specifiers can match the grade to the fatigue and strength demands of the actual foundation. Space Arc Engineering, as an authorised distributor and applicator across Delhi NCR and pan-India, can advise on grout selection alongside anchoring and foundation-repair systems.
Fosroc Conbextra HF — A specifier may prefer Conbextra HF when a high-flow, single-pour non-shrink cementitious grout is needed for deep base-plate gaps and the connection is heavily but statically loaded rather than requiring a documented fatigue certification.
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