The minimum cube strength of concrete used for a pre-stressed member, is

Related MCQs

• In favourable circumstances a 15 cm concrete cube after 28 days, attains a maximum crushing strength
• High strength concrete is used in pre-stressed member
• If Ac, Asc and A are areas of concrete, longitudinal steel and section of a R.C.C. column and m and c are the modular ratio and maximum stress in the configuration of concrete, the strength of column is
• A reinforced concrete cantilever beam is 3.6 m long, 25 cm wide and has its lever arm 40 cm. It carries a load of 1200 kg at its free end and vertical stirrups can carry 1800 kg. Assuming concrete to carry one-third of the diagonal tension and ignoring the weight of the beam, the number of shear stirrups required, is
• The stresses developed in concrete and steel in reinforced concrete beam 25 cm width and 70 cm effective depth, are 62.5 kg/cm2 and 250 kg/cm2 respectively. If m = 15, the depth of its neutral axis is
• The maximum shear stress (q) in concrete of a reinforced cement concrete beam is
• A pre-stressed concrete member is preferred because
• Pick up the assumption for the design of a pre-stressed concrete member from the following:
• A pre-stressed concrete member
• The minimum thickness of the cover at the end of a reinforcing bar should not be less than twice the diameter of the bar subject to a minimum of