SikaGrout®-295 IN
Ultra high strength precision cementitious grout
SikaGrout®-295 IN is a 1-part, cementitious, ultra high strength, free flowing grout with high mechanical performance. Specifically designed for onshore wind turbine foundation joint filling under metal bases and foundations.
- Fast early strength development
- High final strength
- Application thickness 10 to 200 mm
- Shrinkage compensated (both in plastic and hardening stage)
- Good flow properties
- Good adhesion to concrete
- No segregation or bleeding
- Pumpable
- Non-corrosive
- Free from chlorides and metallic particles
- Not flammable
Usage
For renewable energy applications where gaps and joints between structural elements / substrates require a high mechanical strength grout:- Wind turbine bases
- Stanchion base plates
- Concrete posts
- Bearing plates
- Heavy machine base plates
- Vertical and horizontal precast concrete elements
- Filling large voids
- For interior and exterior use
Advantages
- Fast early strength development
- High final strength
- Application thickness 10 to 200 mm
- Shrinkage compensated (both in plastic and hardening stage)
- Good flow properties
- Good adhesion to concrete
- No segregation or bleeding
- Pumpable
- Non-corrosive
- Free from chlorides and metallic particles
- Not flammable
Packaging
30 kg and 500 kg bag
Colour
Grey powder
Product Details
Chemical base
Cement, selected fillers and aggregates, special additives
Shelf life
6 months from date of production
Storage conditions
The product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +30 °C.
Maximum grain size
Dmax: ~3 mm
Compressive strength
| Time | Compressive strength at 20 °C | Compressive strength at 35 °C |
| 1 day | ≥ 35 N/mm2 | ≥ 50 N/mm2 |
| 3 days | ≥ 70 N/mm2 | ≥ 80 N/mm2 |
| 7 days | ≥ 80 N/mm2 | ≥ 90 N/mm2 |
| 28 days | ≥ 90 N/mm2 | ≥ 95 N/mm2 |
Values measured at water / powder ratio 0.115, cube size 50 mm
Modulus of elasticity in compression
| ~38 GPa | (EN 13412) |
Flexural strength
| Time | Flexural strength at +20 °C | Flexural strength at +35 °C |
| 1 day | ≥ 4 N/mm2 | ≥ 5 N/mm2 |
| 28 days | ≥ 12 N/mm2 | ≥ 13 N/mm2 |
Values measured at water / powder ratio 0.115, cube size 50 mm
Splitting tensile strength
| ~6 MPa (+35 °C, water / powder = 0.115) | (EN 12390-6) |
Tensile adhesion strength
| > 2.0 MPa | (EN 1542) |
Expansion
Max. 2 %
Application
Mixing ratio
~11–12 %
~3.3–3.6 L of water for 30 kg of powder or ~55–60 L of water for 500 kg of powder
Fresh mortar density
~2350 kg/m3 (water / powder = 0.115)
Layer thickness
10 mm min. / 200 mm max.
Flowability
| Flow time | Values after 5 minutes at +20 °C | Values after 5 minutes at +35 °C |
| After 30 seconds | 425 mm | 395 mm |
| End | 690 mm | 535 mm |
| Time after mixing | Values at +20 °C | Values at +35 °C |
| After 10 min | 300 mm | 295 mm |
| After 60 min | 265 mm | 260 mm |
| After 180 min | 195 mm | 190 mm |
Ambient air temperature
+10 °C min. / +40 °C max.
Substrate temperature
+10 °C min. / +40 °C max.
Pot life
~60 minutes (+30 °C, water / powder = 0.115)
Initial set time
| ~230 min (+20 °C, water / powder = 0.115) | (EN 196-3) |
Setting time
| ~450 min (+20 °C, water / powder = 0.115) | (EN 196-3) |
MIXING
IMPORTANT
Do not add more water than the maximum specified.
IMPORTANT
Do not use continuous mixing equipment.
Electric Single or double paddle mixer
- Pour the correct amount of clean water into a clean mixing container.
- Stir water slowly with a spiral paddle (200–500 rpm).
- Add the complete bag of powder into the water.
- Mix continuously for 5 minutes to achieve a uniform and lump free smooth consistency.
- Wait for 1–2 minutes to allow the entrapped air to escape.
- Mix again for 2 more minutes.
Grout mixer
IMPORTANT
Product must be mixed using suitable grout mixing equipment combined with agitator for large volume mixing.
IMPORTANT
Volume capacity of equipment must be proportionally greater than the volume of material being mixed.
Note: Equipment trials must be considered to make sure product can be mixed satisfactory before full project application.
- Pour the minimum water ratio in the correct proportion into the grout mixer.
- While stirring the water, slowly add the powder to the water.
- Add more water within the mixing time up to the maximum allowed until the required consistency is achieved.
- Mix continuously for a minimum of 4 minutes. For larger mixes the mixing time must be extended to approximately 6 minutes or as necessary until the grout achieves a lump free smooth consistency.
APPLICATION
Strictly follow installation procedures as defined in method statements, application manuals and working instructions which must always be adjusted to the actual site conditions.
Pre-wetting
- The prepared concrete substrate must be thoroughly saturated with clean water for a recommended 12 hours before application of the grout.
- The surface must not be allowed to dry within this time.
- Before application of the grout, all water must be removed from within formwork, cavities or pockets and the final surface must achieve a dark matt appearance (saturated surface dry) without glistening.
Placing: Manual application
- Apply the material within ~10 minutes after mixing to take advantage of the expansion properties.
- Immediately after mixing, pour the mixed grout into the header box or hopper ensuring continuous grout flow during the complete grouting operation to avoid trapping air.
Placing: Grout pump application
- For large volume placement, grout pumps are recommended.
- Equipment trials must be considered to ensure product can be pumped satisfactory.
Surface finishing
IMPORTANT
Do not add additional water on the surface.
IMPORTANT
Do not over work the surface as this may cause surface discolouration and cracking.
- Finish exposed grout surfaces to the required surface texture as soon as the grout has started to stiffen.
- After the grout has initially hardened, remove formwork and trim edges while concrete is ‘green’.
Cold weather working
- Consider storing bags in a warm environment and using warm water to assist with achieving strength gain and maintaining physical properties.
Hot weather working
- Consider storing bags in a cool environment and using cold water to assist with controlling the exothermic reaction to reduce cracking and maintaining physical properties.
CURING TREATMENT
- Protect exposed grout surfaces after finishing from premature drying and cracking by curing under water for at least 72 hours.
- In cold weather, apply insulated blankets to maintain a constant temperature to prevent surface damage from freezing and frost.
CLEANING OF TOOLS
Clean all tools and application equipment with water immediately after use. Hardened material can only be mechanically removed.