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

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

How to derive the compressive strength of concrete from a rebound hammer test - Quora

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

Which one gives the desired compressive strength of concrete, aggregate or cement? Why? - Quora

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

What is the compressive strength of concrete? - Quora

What is the standard used to determine concrete's strength in 7 days? - Quora

What is the acceptance limit of concrete's strength in 28 days? - 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 required compressive strength of grade 35 concrete at 7 days? - Quora