(Solved): show all work pls Problem 6 (20 points). The load (P) to cause failure of a plain concrete beam (Fig ...

Problem 6 (20 points). The load (P) to cause failure of a plain concrete beam (Fig. 2) of square cross-section per ASTM C78 (i.e., third-point bending test) is found to be 2000 lbs. Determine the modulus of rupture of the concrete. Head of testing machine h=6 in Fig. 1- Concrete stress-strain curves in compression L/3 L/3 1/3 Span length=L=24 in Fig. 2-Flexural test of a plain concrete beam