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SikaGrout®-3750

High performance cementitious offshore wind grout

SikaGrout®-3750 is a 1-part, cementitious, high performance, fatigue resistant, free flowing, grout which is shrinkage compensated and achieves high early and final strengths. Specifically designed for offshore corrosion protection of foundations. Layer thickness: 40 – 600 mm                  

  • Very fast early strength development
  • High final strength
  • Fluid consistency
  • Long pot life for pumping
  • Very low shrinkage
  • Shrinkage compensated
 
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Areas of Application

  • High performance grouting for corrosion protection of offshore foundations
 

Advantages

  • Very fast early strength development
  • High final strength
  • Fluid consistency
  • Long pot life for pumping
  • Very low shrinkage
  • Shrinkage compensated
 

Product Details

Product Information

Composition

Special cement, selected aggregates and additives

Shelf life

6 months from date of production

Storage conditions

Product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +30 °C. Always refer to packaging.

Maximum grain size

Dmax: 1 mm
Technical Information

Compressive strength

Time

+5 °C

+12 °C

+20 °C

12 hours

~45 MPa

~54 MPa

~58 MPa

24 hours

~58 MPa

~63 MPa

~63 MPa

7 days

~63 MPa

~67 MPa

~67 MPa

28 days

~70 MPa

~70 MPa

~75 MPa

Tested in cylinders 150 × 300 mm

Equivalent compressive strength class C70/85 according to EN 206-1

Modulus of elasticity in compression

~32 GPa at +20 °C after 28 days

(EN 13412)

Tensile strength in flexure

~6 MPa after 28 days

(EN 12390-5)

Splitting tensile strength

1 day

28 days

~4 MPa

~4,4 MPa

Values measured at +12,5 °C

Shrinkage

Autogenous shrinkage: ~+0,23 mm/m after 28 days at +20 °C

(ASTM C1698-09)

Application

Application Information

Mixing ratio

14,2 % – 14,8 %

142 kg–148 kg of water per 1000 kg of powder at +10 °C

Fresh mortar density

~2.2 kg/l

Layer thickness

min. 40 mm /max. 600 mm

Flowability

260 mm after 2 hours at +20 °C

(EN 13395-1)

 

Ambient air temperature

+5 °C min. / +20 °C max. Includes seawater temperature range

Pot Life

~2 hours at +20 °C

Initial set time

~180 minutes at +20 °C

(EN 13294-1)

Setting time

~210 minutes at +20 °C

(EN 13294-1)
Consumption

Yield

2200 kg of dry powder yields ~1 m3 of fresh grout

1000 kg of dry powder yields ~520 litres of fresh grout
Application steps

MIXING

SikaGrout®-3750 must be mixed using the suitable grout mixing equipment combined with agitator for continuous large volume mixing. Volume capacity of equipment must be applicable to the volume of material being mixed for a continuous operation. Equipment trials must be considered to ensure product can be mixed satisfactory.

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 desired consistency is achieved.

Mix continuously for a minimum of 3 minutes until the grout achieves a lump free smooth consistency. Do not add more water than the maximum specified.

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.

Placing: Grout pump application

Equipment trials must be considered to ensure product can be pumped satisfactory.

CLEANING OF EQUIPMENT

Clean all tools and application equipment with water immediately after use. Hardened material can only be mechanically removed.