There are many ways to predict service life of the concrete structures using various concepts like chlorine diffusion etc.

I think damage assessment models can be used to ascertain the age of concrete. One way may be to assess carbon dioxide gas diffusion in concrete on the basis of average CO2 in the atmosphere and it's diffusion in the concrete over a certain period by measuring depth of penetration and calculating time required to penetrate that measured depth.

Dear Dr. Hossam,

I believe it's so difficult to test the age of concrete. You should have information on cement, sand, gravel, water and any additives in concrete mix. Also, you need concrete compressive strength, load, temperature, humidity and CO2 history.

Best wishes!

There are many ways to predict service life of the concrete structures using various concepts like chlorine diffusion etc.

I think damage assessment models can be used to ascertain the age of concrete. One way may be to assess carbon dioxide gas diffusion in concrete on the basis of average CO2 in the atmosphere and it's diffusion in the concrete over a certain period by measuring depth of penetration and calculating time required to penetrate that measured depth.

I think that available methods are quite enough to satisfy requirements.

I agree with Om Prakash Chhangani , Hossam E. M. Sallam and Mohannad H. Al-Sherrawi

There are many ways to measure the age of concrete, But ACCURATE measure of concrete age it's difficult... During it's service life some factors can reduce or increase the initial concrete age known.