Product Data Sheet Show all documents

Sika® Set Accelerator

Ac – Set Accelerator

Sika® Set Accelerator is a calcium-chloride based admixture used to reduce the setting time of concrete.

The advantages of Sika® Set Accelerator are:
  • Reduced initial setting time of concrete.
  • Improved early strength development of concrete.
  • Reduction of delays due to cold weather.
  • Reduction of concrete bleed (due to faster set)
  • Earlier stripping times.
Product Data Sheet Show all documents

Usage

Sika® Set Accelerator can be used to reduce concrete setting times and improve early strength development and is useful in the following applications:
  • Reduction of setting time during cold-weather concrete work.
  • Emergency concrete repairs where early strength is necessary.
  • Improve setting time and early strength for fast-track construction.
  • Improve setting time and early strength for precast concrete products.
Note: The use of Sika® Set Accelerator will increase the calcium-chloride content of concrete. Precautions must be taken to ensure the chloride content of reinforced or prestressed concrete does not exceed the chloride limits imposed by AS 1379 and other relevant construction standards.  

Advantages

The advantages of Sika® Set Accelerator are:
  • Reduced initial setting time of concrete.
  • Improved early strength development of concrete.
  • Reduction of delays due to cold weather.
  • Reduction of concrete bleed (due to faster set)
  • Earlier stripping times.

Packaging

Bulk deliveries

205 litre drum

10 litre container

Colour

Colourless clear liquid

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

Sika® Set Accelerator meets and exceeds all requirements of Australian Standard 1478.1-2000 Set-accelerating Admixture (Ac)
Product Information

Chemical Base

Liquid solution of calcium chloride

Shelf Life

Stored at temperatures between 5°C and 35° C in unopened original containers protected from direct sunlight, shelf life is at least one (1) year.

Storage Conditions

Store at temperature between 5°C and 35°C, protected from the direct sunlight.

Specific Gravity

1.33 g/cm3

Total Chloride Ion Content

1000 ml contains approx. 330 g chloride ion.

Application

Application Information

Compatibility

When using with other admixtures check compatibility first.

When using Sika® Set Accelerator laboratory and site trials are recommended.

Dispensing

Sika® Set Accelerator should ideally be dispensed with the batch water. Sika® Set Accelerator should not be dispensed directly onto dry cementitious materials.

Sika® Set Accelerator can be added to concrete after mixing, but concrete should then be thoroughly mixed before being discharged. (Minimum of 1 minute/m3 mixing at full speed).
Consumption

Recommended Dosage

Typical dosage is between 1000 and 2000 ml per 100 kg of total cementitious material. Optimum dosage should be determined by site trials. Dosages outside the typical range can be used. Trials should be carried out to confirm performance.

As ambient and concrete temperatures reduce an increase in the dose rate of Sika® Set Accelerator may be necessary in order to maintain performance.

At very low temperatures (typically below 5°C), other precautions may be necessary in order to ensure concrete sets. Precautions may include heating water or aggregates etc.

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