STUDY ON STRENGTH OF CONCRETE USING VARIOUS COARSE AGGREGATES, PART-18

5.4.3.4 Calculation

If the fracture initiates in the tension surface within the middle third of the span length, we can calculate the modulus of rupture as follows:

                                         R=Pl/bd²

where

R= modulus of rupture, psi

P= maximum applied load indicated by the testing machine, lbf

l = span length, inch

b= average width of specimen, inch

d= average depth of specimen, inch

5.4.4 Diagrams for shear strength

Fig No. 5.3: Shear force and Bending moment diagram.