Hi, During hand mixing of concrete care must be taken for good quality of the mix.
Procedure: mixing by hand should be done at a clean and smooth place.
- Spread evenly the measured quantity of sand.
- Spread the required amount of cement over the sand.
- Which speed mix the sand and cement uniformly with turning the mixture again and again till the even colour with the streak-free mixture will form.
- then makes the measured quantity of coarse aggregate and spread over the mixture of sand and cement.
- Again mix all the ingredients and forming a whole mass. Mix at least three times by turning again and again from centre to outside Mannar.
- Make a hollow hole in the middle of mixed file
- 3:1 ratio should be considered and add the 3 quarter of the total quantity of amount of water and mixed the materials by turning from centre to side till the uniform colour will occur.
- Then an extra cement of 5% should be added when hand mixing is adopted.
- The PPE kits should be nearby the labour for self-protection.
- After the use of concrete test wash the mixing platform at the end of the day.
Hope this is beneficial for you.