Question

The third-point loading flexure strength test was performed on a concrete beam having a cross section of 0.15 m by 0.15 m and a span of 0.45 m. If the load at failure was 35.7 kN, calculate the flexure strength of the concrete.

Answer 1

The concrete's flexure strength can be calculated by dividing the load at failure by the area of the cross-section and span of the concrete beam. This gives a flexure strength of 7,276 kN/m2. This is a very high strength for concrete and indicates that the concrete structure has very good durability and strength characteristics.