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    Retarding water reducing admixture JF-4

    Retarding water reducing admixture JF-4

    Quantity
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    Detail

      Applications

      JF-4 is made of set retarder and water reducing agent.

      JF-4 can delay the setting time of concrete, hold the plastic of freshly mixed concrete in the long term and be good for moulding by casting under the condition of high temperature in summer.

      When JF-4 applied to guss concrete, it can increase the cohesiveness of the concrete and reduce slump loss, concrete disintegration and concrete bleeding.

      JF-4 can reduce the hydration heat and temperature crack, and also can delay the peak heat release, when a mass concrete is concreting continuously.

      JF-4 is essential to additive in the summer of concrete construction.

      JF-4 is applicable for commodities which are concreted by various portland cement, pump concrete and mass concrete.

      JF-4 isn’t suitable for the steamed concrete and cement admixture which is made by anhydrite and fluorgypsume.

      Properties

      Dosage: for powder 0.5-1.0%. for liquid 1.5-3.5%

      Adding 1.0%; retarding time: 1 – 3 hours.

      Air content increased slightly.

      Retention value of slump constant: 1h≥90%

      Use it in the above 5 degrees celsius temperature conditions.

      Uniformity

    Item

    Results

    Item

    Results

    Appearance

    Power

    Isabelline powder

    Cement paste fluidity(mm)

    ≥160

    liquid

    Brown liquid

    Fineness(0.315mm),<

    5%

    Moisture content of Power (%)

    5±1%

    Chloride ion (%)

    ≤0.6%

    Liquid density ((20℃))

    1.18±0.02 g/ml

    pH  Value

    7-9

      Concrete performance with 0.75% dosage by binder mass

    Test item

    Quality index

    Results

    Hardening accelerating

    Standard

    Set retarding

    Water reducing rate (%), ≥

    8

    8

    8

    16.0

    Ratio of bleeding rate (%), ≤

    95

    100

    100

    0

    Air content (%), ≤

    4.0

    4.0

    5.5

    4.5

    Difference in setting time(min)

    Initial setting

    -90~+90

    -90~+120

    ﹥+90

    +183

    Final setting

    Ratio of compressive strength (%), ≥

    1d

    135

    3d

    130

    115

    7d

    110

    115

    110

    110

    28d

    100

    110

    110

    115

    Ratio of shrinkage(%), ≤

    28d

    135

    120

      Conclusion: the project is in line with retarding index of “water-reducing admixture” of GB8076-2008.

      Packaging, transport and storage

      Powder JF-4 is available in 25kg film-lined bags. Liquid JF-4 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 to prevent absorption of moisture and agglomeration. If storage has surpassed the time, test must be done to confirm the validity.

    Corresponding parameter set not found, please add it in property template of background
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