According to the Third-Point Method, the flexural strength for a concrete beam sample tested in 14 days should be?

The Third-Point Method is a widely used technique for testing the flexural strength of concrete beams. The flexural strength is determined by applying a load at two points, causing a bending moment in the beam. The testing at 14 days is particularly significant because it is a benchmark period where concrete typically reaches a substantial portion of its design strength due to hydration and curing processes.

At 14 days, concrete has generally gained enough strength to be reliable for performance assessments. The expected flexural strength for concrete depends on factors such as the concrete mix design, curing conditions, and the presence of any admixtures.

In the context of common values established from empirical data and standards, a flexural strength of 3.80 MPa is reasonable for concrete when tested at this age. It aligns with the anticipated growth of concrete strength based on established charts and guidelines that provide expected strength gain over time.

While the other values, whether higher or lower, may not accurately represent what is typically observed at this stage, 3.80 MPa stands out as a plausible indication of the strength achieved by concrete when tested under the Third-Point Method at the 14-day mark.