Compressive strength of concrete is 28.9 N/mm2 after 56 days. Is this acceptable? - Quora

A part of a structure has failed the concrete strength testing. Is it better to just retrofit that part or demolish and rebuild it? - Quora

Why do we want to check the compressive strength of concrete? - Quora

Why is 28 days compressive strength of cement concrete taken as the standard in the civil engineering construction industry? - Quora

Why when we take a cube or cylinder of concrete to get the compressive strength or any property else we immersed the sample in the water a long the 28 days although

What is the compressive strength of cylindrical concrete specimen at 7 days? - Quora

How is the compressive strength and the consistency of cement determined? - Quora

What is the effect of coarse aggregate size in compressive strength of concrete? - Quora

What is the compressive strength of concrete? - Quora

Why is the old concrete so much more durable than the new concrete? - Quora

How is the strength of concrete specified? - Quora

What is the most common test used to determine the strength of concrete? What are the benefits of this test? - Quora

Will concrete lose its strength with time? - Quora