HGM-125 High compressive strength grout

The special grouting material for offshore wind power is modified cement-based grouting material, which is developed by using polymer and nanometer reinforcement technology. The product has performance of large fluidity, high early strength, ultra-high strength, ultra durability, no shrinkage and high fatigue resistance.

General Feature Performance

GENERAL

Scope of application

This product is applicable to the grouting of single pile transition section of offshore wind turbine, jacket foundation of offshore wind turbine and jacket foundation of offshore booster station.

FEATURE

I. Product features

◆Ultra high average compressive strength

◆Ultra high elastic modulus, which brings excellent hardening performance.

◆Excellent fatigue resistance

◆Extremely high early strength

◆The temporary support can be removed quickly, so that the equipment can be put into operation as soon as possible,

◆Strength increases rapidly under low temperature conditions

◆No segregation or bleeding, ensuring consistent physical performance and preventing pump blockage

◆Shorten the installation time, reduce the installation cost, and reduce the pressure and wear of the pump

PERFORMANCE

Performance GB50448-2015 Technical Code for Application of Cement Based Grouting Materials

Item		performance index
Initial fluidity		≥290		≥340
fluidity, mm	30min	≥260		≥310
fluidity, mm	60min	≥230		≥260
initial setting time, min		≥120		≥120
appearance inspection			No caking
Specific gravity, kg/m³			2350~2500
gas content,%			≤4
bleeding rate			0
Vertical expansion rate,%	3h expansion value		0.2~0.2
Vertical expansion rate,%	Difference of expansion value between 24h and 3h		0.02~0.5
Cube compressive strength, MPa	1d		≥50
	3d		≥85
	28d		≥125
Modulus of elasticity in static compression, GPa	1d		≥12
Modulus of elasticity in static compression, GPa	28d		≥45

Construction process

1. After the pipe pile is driven offshore and the jacket is installed, the leg of the jacket is sleeved with the pipe pile, and an annular space is formed between the leg and the pipe pile;

2. Block the bottom of the annular space and set a grouting pipeline connecting the annular space;

3. The grouting material slurry is pumped through the grouting pipeline to grout the annular space;

4. After the grouting material is fully filled in the annular space after grouting, stand for a period of time to conduct pressure shield grouting;

5. After the pressure shield grouting, the grouting shall be completed and the curing shall be carried out.

Packaging and storage

Packed in kraft bag, 50kg/bag, pay attention to moisture, and the shelf life is 6 months.

HGM-125 High compressive strength grout for off shore wind powder sation