Then fly ash was added and mixer continued for another 2 min
Mixer was well covered during the mixing process to avoid the volatility of fly ash due to its light weight
Water was added and mixing continued for another 2 min
The mixture was then tested for flowability following the procedure specifiEd in ASTM D6103
The mixture is considered flowable when the spread diameter coming from the 200 min high tube is 200 + 20 min on a horizontal surface