it is concrete mix which gain strength 20kn/mm2 in 28 day of curing....

• Yes, the vacuum dewatered concrete requires curing in order to gain its strength.
• The concrete is cured for 28 days.

concrete made upof ordinary portland cement gain strength in 28days

yes,up to one year. However the rate again of strength is very slow.

Curing in buildings is a process that is keeps freshly poured concrete from drying. It is kept at a certain temperature to keep it moist. Curing in buildings is important because it gives concrete what it needs to gain strength properly.