The quantity and quality of the cement must be of the appropriate kind.
Excess water must not be used while mixing.
Use mixture machines for mixing the concrete.
Use the concrete within 30 minutes of its mixing.
Use a vibrator for better compaction of the concrete.
Curing must be done regularly.
Concrete laying must be done in the right weather conditions (below 40 degrees) only.
Concrete laying must be done in the early hours or at night, during summer.