Set Accelerators - SikaSet® NC-4

Accelerating Admixture

SikaSet® NC-4 is a high performance, non-chloride, water reducing and accelerating admixture.
SikaSet® NC-4 meets the requirements of ASTM C-494 Types C and E.

Accelerated Set Times and Strength Development: SikaSet® NC-4 may be used to accelerate set times and increase early strength gain where job-site efficiency is important in order to meet construction deadlines. SikaSet® NC-4 saves time and money by allowing faster finishing and stripping of concrete surfaces.

• Predictable accelerated setting time across a wide range of temperatures.
• Increased early and ultimate compressive and flexural strengths.
• Reduced insulation and heating costs during the curing period.
• Accelerated set times allow crews to finish concrete earlier, saving on labor costs.
• Increased productivity due to faster stripping and reuse of forms.
• Accelerated strength gain allows earlier structural use and speeds completion time.

Cold Weather Concreting: In case of freezing conditions, cold weather concreting practices as specified in ACI 306 - Standard Specification for Cold Weather Concreting should be followed. SikaSet® NC-4 does not contain calcium chloride or any other intentionally added chlorides and will not initiate or promote the corrosion of steel members present in the concrete.

Usage

SikaSet® NC-4 is an effective accelerator where high early strength concrete is desired and the use of calcium chloride is prohibited.

Advantages

Accelerated Set Times and Strength Development: SikaSet® NC-4 may be used to accelerate set times and increase early strength gain where job-site efficiency is important in order to meet construction deadlines. SikaSet® NC-4 saves time and money by allowing faster finishing and stripping of concrete surfaces.

• Predictable accelerated setting time across a wide range of temperatures.
• Increased early and ultimate compressive and flexural strengths.
• Reduced insulation and heating costs during the curing period.
• Accelerated set times allow crews to finish concrete earlier, saving on labor costs.
• Increased productivity due to faster stripping and reuse of forms.
• Accelerated strength gain allows earlier structural use and speeds completion time.

Cold Weather Concreting: In case of freezing conditions, cold weather concreting practices as specified in ACI 306 - Standard Specification for Cold Weather Concreting should be followed. SikaSet® NC-4 does not contain calcium chloride or any other intentionally added chlorides and will not initiate or promote the corrosion of steel members present in the concrete.

Packaging

SikaSet® NC-4 is available in 55 gallon drums (208 liters), 275 gallon totes (1040 liters) and bulk delivery.

Color

Blue Liquid

Product Details

Product Information

Shelf Life

Shelf life when stored in dry warehouse conditions between 50 °F and 80 °F (10-27 °C) is 1 year.

Storage Conditions

SikaSet® NC-4 will begin to freeze at 20 °F (-7 °C). If frozen, thaw and agitate thoroughly to return to its normal state before use.

Specific Gravity

Approx. 1.42

Application

Application Information

Mixing

Add the correct amount of SikaSet® NC-4 at the concrete plant. The admixture may be added manually or by automated dispenser directly in the mixer or into the water line at the batch plant. When used in combination with other admixtures care must be taken to dispense each admixture separately into the mix. Do not mix with dry cement. Field evaluations should be carried out to determine the minimum ambient and concrete temperature required, and the optimum dosage for the desired setting time and strength performance. Sika strongly recommends that appropriate, sound curing practices be followed to protect fresh concrete from excessive heat loss in extreme weather conditions.

Combination with other admixtures: SikaSet® NC-4 is highly effective as a single admixture or in combination with other admixtures in the Sika System.

Consumption

Recommended Dosage

To accelerate set times dosage at the rate of 9-40 fl. oz. per 100 lbs. (580-2600 ml / 100 kg.) of cement is recommended. When used to protect concrete from freezing, dosage will vary with different brands of cement and ambient temperatures and higher dosages may be necessary. Sika recommends that trial mixes be performed to determine the most efficient dosage. When used at higher dosages, consider the water contributed by the admixture and adjust mixing water accordingly.

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