Question

What is equivalent flexural strength ratio?

(a) The stress value obtained when the peak load value is used in the equation of modulus of rupture

(b) The stress value representing the average flexural strength in the post peak region up to a specified deflection of L/n obtained when Pe,n is used in the equation of modulus of rupture

(c) The load value representing the average load-carrying capacity in the post peak region up to a specified deflection of L/n

(d) Value of the mean equivalent flexural strength normalized with respect to mean flexural strength

I had been asked this question during an internship interview.

My enquiry is from Flexural Strength of Concrete topic in section Testing of Concrete of Concrete Technology

Answer 1

The correct answer is:

(b) The stress value representing the average flexural strength in the post peak region up to a specified deflection of L/n obtained when Pe,n is used in the equation of modulus of rupture.

This definition refers to the equivalent flexural strength ratio in the context of concrete testing. It represents the stress in the post-peak region of a concrete specimen's flexural test, up to a specified deflection, where Pe,n is used to calculate the modulus of rupture.