Flexural Strength Test of Concrete (Beam)

1. Which Indian Standard (IS) code is adopted for the determination of flexure strength of hardened concrete?
2. What are the recognized ages of the test specimen at the time of the test in days as per IS:516?
3. According to IS516, what should be the length of the specimen having square cross section of nominal width 100mm?
4. What is the minimum number of test specimens required?
5. What is the rate of the loading to be applied on the beam specimen?