Consider the following statements : The effect of sea water on hardened concrete is to 1. increase its strength 2. reduce its strength 3. retard setting 4. decrease its durability. Of these statements :
A doubly reinforced concrete beam has effective cover d' to the centre of compression reinforcement. xu is the depth of neutral axis, and d is the effective depth to the centre of tension reinforcement. What is the maximum strain in concrete at the level of compression reinforcement?