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Polycarboxylate retarding superplasticizer liquid (VF-2)
Applications
Impermeability mark of VF-2 can be P12, intensity of 100 times freezing and thawing cycle without loss and lasting quality has improved significantly.
VF-2 is suitable for continuous concrete in mass in the hot season, reduce the hydration heat and avoid temperature cracks.
VF-2 can improve the concrete workability and enhance the technical performance of concrete.
To strictly control the content in accordance with the mix ratio of construction, do not exceedthe recommended dosage.
Before VF-2 mixed use with other admixture, it must pass the laboratory test.it can not be mixed with naphthalene based water reducing admixture.
VF-2 is chloride – free, low alkali, good for the adaptability of cement
VF-2 is applicable to concrete construction in the temperature conditions of - 5 ° c - 40 degrees Celsius.
VF-2 isn’t suitable for the cement admixture which is made by anhydrite and fluorgypsum and also unsuitable for prefabricated part of steam curing.
Properties
Excellent water-reducing ability. VF-2 can significantly reduce 15% ~40% mixing water in concrete with 1.5%~3.5% dosage.
Setting time: setting time delay 2-4h.Raise special requirements in the service at pre-sales stage.
Uniformity
|
Item |
Results |
Item |
Results |
|
Appearance |
White liquid |
Liquid density ((20℃)) |
1.04±0.02 g/ml |
|
Cement paste fluidity(mm) |
≥240mm |
pH Value |
6-8 |
Concrete performance with 2.0% dosage by binder mass
|
Test item |
Quality index |
Results |
|
|
Water reducing ratio（%）,≥ |
15 |
28.0 |
|
|
ratio of bleeding rate（%）,≤ |
100 |
0 |
|
|
Air content（%）,≤ |
3.0 |
2.0 |
|
|
Difference in setting time |
initial setting |
+120--+240 |
+168 |
|
Final setting |
+153 |
||
|
Ratio of compressive strength |
3d |
125 |
173 |
|
7d |
125 |
152 |
|
|
28d |
120 |
140 |
|
|
Ratio of shrinkage（%）,≤ |
28d |
125 |
113 |
|
Anti-freeze label，≥ |
50 |
100 |
|
|
Reinforcement corrosion hazard |
None |
None |
|
Conclusion: the project is in line with retarding index of “Retarders as well as high efficiency water reducing agent” of DL/T5100-1999.
Packaging, transport and storage
Liquid VF-2 is available in sealed plastic or iron tank. Other special package can also be available according to prior consultation.
Special measures should be taken to ensure entire package. Keep waterproof during transportation.
Dry and well ventilated warehouse is needed for storage. Quality guarantee of VF-2 is one year under normal conditions. If storage has surpassed the time, test must be done to confirm the validity.