Under normal conditions using an ordinary cement, the period of removal of the form work, is:

The function of aggregates in concrete is to serve as

Efflorescence in cement is caused due to the excess of

The percentage of water for making a cement paste of normal consistency varies from

The diameter of the Vicat plunger is 10 mm and its length varies from

Separation of water or water sand cement from a freshly concrete, is known

The 28 days cube strength of mass concrete using aggregates of maximum size 5 cm for gravity dams should be

The ratio of various ingredients (cement, sand, aggregates) in concrete of grade M20, is