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Generally, concrete is required to be air entrained event if it is not exposed to freezing and thawing due to important benefits that concrete enjoys in other ways such as improving concrete workability. Concrete air entrainment is not an easy process since it is influence by several factors. These factors shall be properly investigated to be able to obtain designated air entrainment.Fig.1: Air Entrained Concrete
Factors Affecting Air Content of Concrete
- Water content
- Fine aggregates grading
- Coarse aggregates
- Temperature of concrete
- Mixing action of concrete
- Use of admixtures other than air entrained admixture
- Cement content of concrete
- Fly ash content
- Vibration or compaction of concrete