Micro-fine cement is Portland cement based cements composed of ultrafine particles and are designed for injection into loose soils, rock and concrete. Because of micro-fine cement’s small particle size (the fineness largest grain size passing D95 is < 16.0 µm and Blaine value> 600 m2/kg.), it penetrates very well into tight joints, fissures and pore spaces to provide a water-tight grouted rock or soil mass. It can be used as grouting materials after adding water reducing agent (GC1).

1.    2Application

· Rock injection: Tunnels, caverns, mines, etc. used for pre- and post excavation injection.

· Ground water sealing and ground stabilization.

· Soil injection.

· Dam foundation injection

· Prepacked injection.

· Contact injection.

1.3 Features and benefits

· Fast setting time.

· Fine particle size

· Durable.

· Economical solution.

· Non-hazardous

· Standard cement injection equipment can be used.

· Better penetration in tight joints, fissures and pore spaces.

· Greater penetration imparts greater water tightness.

· Excellent penetration in tight joints, fissures and pore spaces

· Better working environment and no hazardous components.

· Better working environment.

· Improved grouting efficiency and less waste

 

1.4 Packaging

Micro-fine cement is supplied in 25 kg plastic bags for ease of handling and to maximize

storage life.

2 Performance Characteristics

High-pressure piston pumps are normally used to pump the suspension into the rock. The

grout should be injected within6HOURS after mixing to ensure that it keeps penetrating into

the fissures.

2.1 Technical Data

PRODUCT		Unit	MFC-600	MFC-800	MFC-1200
Appearance			Grey Powder	Grey Powder	Grey Powder
Odor			none	none	none
Toxic			none	none	none
Density		kg/dm³	~3	~3	~3
Specific Surface Area		㎡/kg	≥600	≥800	≥1200
Grain Size D50		μm	＜8.96	＜4.66	＜3.21
Grain Size D90		μm	＜26.92	＜13.31	＜7.55
Grain Size D95		μm	＜32.00	＜16.00	＜10.51
Setting Times （Measured by Vicat needle）	Initial set time	min	60	120	60-120
	Final set time	min	120	150	120-150
Compressive Strength	3d	Mpa	25	25	25
	7d	Mpa	45	45	45
	28d	Mpa	60	60	60

Note: MFC-600 this product has been discontinued.

3 Application procedure

3.1 Dosage

Micro-fine cement is generally dosed at 1.5 – 2.0 liters other micro-fine admixture per 100 kg of cement. Other dosages

may be recommended in special cases according to specific job requirements. Consult your

local UGC representative for advice.

3.2 Mixing

1. water 

2. Micro-fine cement 

3. 2‰ GC1 

Mix at least for 5 minutes with colloidal mixer at 1500rpm.

· Transfer to agitator.

It is very important to use an efficient mixer. Colloidal mixers are the best, but high-speed

paddle mixers are acceptable.

Minimum rpm for colloidal mixers: 1500 rpm.

Minimum rpm for paddle mixers: 400 rpm.

NB: Do not over mix. Mixing longer than recommended may cause the grout temperature to

increase and set in the pump and hoses.

3.3 Pot life

The mix shall be kept under constant agitation prior to injection.

4 Reference

4.1 Storage 

Micro-fine cement has a shelf life of 6 months when stored in original closed bags in ventilated

dry areas.

4.2 Safety precautions

Any physical contact (e.g. skin or eyes) made with micro-fine cement should be avoided, as it may cause irritation or burns. If such contact occurs, the affected area should be washed with plenty of clean water. In case of eye contact, seek immediate medical advice. For further information please refer to the Material Safety Data Sheet or contact your local UGC office. The information given here is true, represents our best knowledge and is based not only on laboratory work but also on field experience. However, because of numerous factors affecting results, we offer this information without guarantee and no patent liability is assumed. For additional information or questions, please contact your local UGC representative.