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concrete accelerator admixture (VF-6)

VF-6 is used in railway or road tunnels, metallurgy, coal, mine workings and chamber.

Category

Others


Detail

Applications

VF-6 is used in railway or road tunnels, metallurgy, coal, mine workings and chamber.

VF-6 is used in sprayed concrete or sprayed mortar supports.

VF-6 is suit for concrete with the requirements of rapid hardening, flash setting.

VF-6 is suit for paste with initial setting time less than 2.5min, final setting time less than 10min.

Properties

A kind of alkaline admixture, non-toxic, non-flammable.

Excellent flash setting ability.

Excellent mechanical property.

For powder VF-6, the dosage is typically 4.0%~6.0% by mass of cement.

The amount of VF-6 used in concrete will be slightly adjusted depending upon job requirements, such as variations in cement, temperature and other job site conditions.

Usage

Experiment must be done when changing cement.

No special applying needs.

Fresh cement is necessary. The cement degree no less than 32.5 can ensure excellent applying effect.

Accurate measurement is needed.

Uniformity

Item

Index

Item

Index

Appearance

yellow brown powder

Chloride ion (%)

≤0.6%

Moisture content (%)

≤2.0%

pH  Value

10-12

Fineness(0.315mm),<

5%

 

 

 

  Performance with 0.5% VF-6 by mass of binder

Item

Classification

Result

I

II

Paste

Initial setting/min:s (≤)

3:00

5:00

2:30

Final setting/min:s (≤)

8:00

12:00

7:40

Concrete

1d Compressive strength /Mpa(≥)

7.0

6.0

7.2

Ratio of 28d Compressive strength /%(≥)

75

70

77

Conclusion: the project is in line with acceptable end product index of “sprayed concrete additive” in JC477-2005.

Packaging, Transport and Storage

VF-6 is available in metal pail or iron tank. Other special package can also be available according to prior consultation.

VF-6 must be stored at the temperature above 0℃. Special measures should be taken to ensure entire package.

Dry and well ventilated warehouse is needed for storage. Quality guarantee of VF-6 is one year under normal conditions. If storage has surpassed the time, test must be done to confirm the validity.

Keyword

concrete

vf-6

setting