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Polycarboxylate anti-freezing superplasticizer (VF-15)

VF-15 is suitable for winter construction of all kinds of concrete at the average temperature of -5 ℃ -15 ℃.

Category

Polycarboxylate series


Detail

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

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
(set point of temperature is -10℃)

 

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.

Keyword

polycarboxylate

vf-15

temperature