What Types of Admixtures are used in Concrete?

If you're looking for high-performing concrete admixtures, consider checking out the Bisley platform. We provide technically advanced raw materials required for concrete surface construction. We have been in business for decades; hence we manage to tailor our concrete admixture formulations to suit your specific construction environment. 

Typically, concrete admixtures are the chemical or mineral compounds other than aggregates, hydraulic cement, and water added to the concrete mix. Different types of admixtures used in concrete can help;

  • Inhibit corrosion
  • Reduce the rate of hydration
  • Enhance the quality of concrete during placement, mixing, and transporting
  • Produce cellular concrete
  • Improve the workability
  • Increase the concrete's resistance to extreme conditions and chemical attack

At Bisley, we offer a wide range of concrete admixtures, which include:

Retarding Admixtures

Retarding concrete admixtures, also called retarders, delay the rate of hydration and the initial setting time of cement to ensure sufficient placement and vibration time. They are used to reduce the effect of ultimate strength in high-temperature areas where normal setting time is shortened quickly.

Retarders can be used in long hauls, stamping concrete in hot weather, slow placement rate, and trucks in a long queue. The most common ones include soluble borates, sugar, soluble zinc salts, carbohydrate derivatives, and some salts.

Water Reducing Admixtures 

These admixtures are also known as plasticizers and can help reduce the water content in a concrete mix to enhance workability and increase the rate of concrete placement without affecting the weight of cement. 

Using water-reducing admixtures on hardened concrete can help reduce permeability, increase volume stability, prevent cracking and segregation, and improve concrete strength. However, the effect of these admixtures varies based on the type of cement used, mixing temperature, water-cement ratio, and other job conditions. 

The most popular high-range water-reducing admixtures include formaldehyde, Calcium, ammonium lignosulphonates, polycarboxylate, and Sodium.

Air Detraining Admixtures

This is one of our most popular concrete admixtures that help remove entrained air and other gases from the concrete voids. Suppose the aggregates produce more gas than required into the concrete mix. In this case, you can use the air detraining admixtures to remove the unwanted air. 

Air entrainment helps improve the concrete durability, workability, and resistance to severe wetting and drying cycles. Popular air detraining admixtures include water-insoluble alcohol, tributylphosphate, and silicones.

Bonding Admixtures

Bonding admixtures are added into concrete to enhance the bond between the fresh and old concrete surfaces. When new concrete is poured over existing hardened concrete, there is a likelihood of shrinking the new concrete due to a weak bond with the existing surface. 

The bonding admixtures are poured into the cement content to minimize these effects before adding new concrete. These concrete admixtures are water emulsions and are usually made from polymers, synthetic rubber, and natural rubber. Bonding admixtures can be used in;

  • Repair works
  • Existing pavement overlays
  • Screed over roof provision

Conclusion 

Bisley is your one-stop-shop for research-derived concrete admixtures. We take pride in our reputation and ability to add value to your construction by providing high-end products paired with excellent customer services. Get in touch with Bisley today or give us a call on +61 2 8905 4200 for all your chemical admixture needs.

 

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