
Let’s discuss some important precautions that we should keep in our mind while doing hand mixing of concrete. They are as follows ;
- Hand mixing should be used for small concrete preparation
- Hand mixing platform should be watertight and it should be impervious
- Mixing platform should be of concrete platform or brick floor to avoid the addition of extra water in our concrete
- Water should be added in some interval in concrete while hand mixing
- Avoid large sizes of buckets for the measurement purpose
- Labours should wear a mask to avoid some respiratory diseases
Steps to follow for doing hand mixing of concrete :
- Doing proper batching of all the ingredients of concrete and spread them evenly
- Add cement with Sand and mix them for throughout
- Mixing process should continue until we get the homogeneous colour
- Then add coarse aggregate into it and again mix it appropriately
- For mixing forward and backward movement of shovel have to be done
- Then at the centre, one hollow circular space is formed for the addition of water
- While doing hand mixing 5 to 10% of the extra amount of cement should be added
- PPE( Personal Protective Equipment) should be wear by labour while doing hand mixing