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PRODUCTS
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concrete accelerator admixture powder (VF-6)
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
(1) A kind of alkaline admixture, non-toxic, non-flammable.
(2) Excellent flash setting ability.
(3) Excellent mechanical property.
Dosage
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 (%) |
5%±1 |
||
|
pH Value |
10-12 |
Fineness(0.315mm),< |
5% |
Performance with 5% (powder)VF-6 by mass of binder
|
Item |
Classification |
Result |
||
|
I |
II |
|||
|
Paste |
Initial setting/min:s (≤) |
3:00 |
5:00 |
2:42 |
|
Final setting/min:s (≤) |
8:00 |
12:00 |
7:36 |
|
|
Concrete |
1d Compressive strength /Mpa(≥) |
7.0 |
6.0 |
7.5 |
|
Ratio of 28d Compressive strength /%(≥) |
75 |
70 |
78 |
|
Packaging, transport and storage
(1) Powder VF-6 is available in 25kg film-lined bags.
(2) Special measures should be taken to ensure entire package. Keep waterproof during transportation.
(3) Dry and well ventilated warehouse is needed for storage.