Segregation of Concrete
Segregation of Concrete is the separation of ingredients of freshly mixed concrete.
Concrete is the mix of Aggregate, cement, sand and water. When one of the all ingredient is mixed with different proportion then it segregates.
Cause of Segregation
- Water Cement Ratio – The main reason behind segregation is water cement ratio. When water cement ratio is high, the particle doesn’t bind properly each other.
- More Aggregate Quantity – If aggregate quantity is more, the mix fail to bind with each particle.
- Concrete Pouring Height – According to IS 456 :2000, if the concrete pouring height is more than 1.5 meter then it segregate.
- If concrete placing takes more time to placing after mixing, then their is chances that the binding capacity of cement is decreases, so separation of aggregate occur.
How to Overcome Segregation
- Use Proper Mix Design ratio
- Add admixture if necessary
- Placing of concrete should be less than height of 1.5 m.
- Use low water cement ratio
- Use proper rounded shape aggregate and dust free sand
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