Answer / Adarsh Prajapati

In the context of concrete grades, C refers to compressive strength and A represents the age at which the concrete is tested. For example, in C35A, the concrete has a compressive strength of 35 MPa (Megapascals) at 28 days (the A stands for 28 days). The equivalent cube strength would be calculated by dividing the compressive strength by the conversion factor, which is approximately 15.4 for cylindrical specimens and 15 for cubical specimens. So, for C35A, the equivalent cube strength would be around 2.3 MPa (35 MPa / 15).

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