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PRODUCTS
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HUMAN-ORIENTED EXTENSION MARKET , WITH QUALITY AS THE LOCAL MARKET
Polycarboxylate anti-freezing superplasticizer (VF-15)
Applications
VF-15 is suitable for winter construction of all kinds of concrete at the average temperature of -5 ℃ -15 ℃.
Slump loss of VF-15 is small.
VF-15 has better applicability for all kinds of cement and composite material.
VF-15 is chloride – free, low alkali and hazardous substance.
VF-15 hasn’t corrosion for reinforcement metal.
VF-15 belongs to green production.
Properties
Dosage: 2.5~4.5% at temperatures not lower than -15 ℃.
Mixing water should be required to heat.
Pumping's temperature of concrete should be higher than 5 ℃ and use comprehensive thermal storage method.
Uniformity
|
Item |
Results |
Item |
Results |
|
Appearance |
yellow brown liquid |
pH Value |
7-9 |
|
Cement paste fluidity(mm) |
≥160 |
||
|
Liquid specific gravity |
1.05±0.02 g/ml |
Liquid solid content |
25±2% |
Concrete performance with 3.5% dosage by binder mass
|
Test item |
Quality index, I
|
Results |
||
|
Water reducing rate (%), ≥ |
10 |
26 |
||
|
Ratio of bleeding rate (%), ≤ |
80 |
13 |
||
|
Air content (%), ≤ |
2.5 |
3.5 |
||
|
Difference in setting time（min） |
Initial setting |
-150～+150 |
-44 |
|
|
Final setting |
-22 |
|||
|
Ratio of compressive strength (%), ≥ |
-7d |
12 |
16 |
|
|
28d |
100 |
134 |
||
|
-7d+28d |
90 |
103 |
||
|
-7d+56d |
100 |
115 |
||
|
28d Ratio of shrinkage（%）, ≤ |
135 |
106 |
||
|
Permeated height rate (%), ≤ |
100 |
54 |
||
|
Loss rate of frozen-thaw strength (50 times) (%), ≤ |
100 |
33 |
||
|
Ammonia burst size (%), ≤ |
0.10 |
0.01 |
||
|
Reinforcement corrosion hazard |
Explanation of Reinforcement corrosion hazard must be done |
None |
||
Remark: set point of temperature is -10℃(serviceability temperature is -15℃)
Conclusion: the project is in line with acceptable end product index in JC475-2004.
Packaging, Transport and Storage
VF-15 is available in metal pail or iron tank. Other special package can also be available according to prior consultation.
VF-15 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-15 is one year under normal conditions. If storage has surpassed the time, test must be done to confirm the validity.