Today we will learn about air entraining admixtures.
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Table of Contents
Introduction Of Air Entraining Admixtures
Air entrainment is the intentional addition of little air bubbles into concrete or other cementitious materials. Air entraining admixtures are special ingredients that are added to the concrete mix to produce these bubbles. The key work of air entrainment is to increase the freeze-thaw resistance of concrete.
When concrete is subjected to freezing and thawing in the presence of moisture, the water within the pores of the concrete can expand and cause the concrete to crack or spall.
By adding small air bubbles into the mix, the air entrainment admixture creates additional voids within the concrete that allow for the expansion of water without causing damage to the concrete.
Air entraining admixtures are normally used in concrete mixes that will be exposed to freezing and thawing, such as concrete used for sidewalks, driveways, and bridge decks. They are also used in concrete that will be placed in marine environments, as the air bubbles can help prevent corrosion of the steel reinforcement.
Air Entraining Admixtures Names:
Sure, here are the names of some air entraining admixtures:
- Sika Air Entrainment
- Air-Entrainment Admixture by Euclid Chemical
- Adva-Air by GCP Applied Technologies
- Air entraining agent by BASF
- Superplasticizer and Air Entraining Admixture by Fosroc
It’s important to note that the specific product names may vary depending on the manufacturer and location. It’s always a good idea to carefully review the product data sheet and follow the manufacturer’s recommendations when using air entraining admixtures.
Advantages Of Air Entraining Admixtures
Here are some advantages of air entraining admixtures.
- Improved workability: The air bubbles reduce the surface tension of the concrete, making it easier to work with and place.
- Increased strength: The air bubbles can slightly increase the compressive strength of the concrete.
- Increased resistance to segregation: The air bubbles can help prevent the separation of the concrete’s aggregate and cement paste.
Final Note:
That was all about air entraining admixture. Thanks for reading this blog post. If you have any question, please comment below.
Happy Learning!