I hope this link be helpful

https://pdfs.semanticscholar.org/6009/563a4db37cdbe49b426ff5fe0b573a5975af.pdf

Dear Sir,

Benefits of pozzolanic/slag cements

1. Resistance to Chloride & Sulphate attacks

2.Low risk of cracking

3.Improved workability

4.Compatibility with all types of admixtures

5.Resistance against alkali-silica reaction

6. Minimised shrinkage cracks

Further details refer following articles:

https://www.sciencedirect.com/science/article/pii/S1110492913000040

Article Trends and developments in green cement and concrete technology

There are a number of reasons for this. Pozzolanic systems, when well-cured, posses a lower porosity and thus a lower permeability. This prevents the ingress of aggressive species.

Many pozzolans also have a higher alumina content than cement, this encourages the formation of calcium aluminate phases, such as Friedel's salt or Kuzel's salt.

I have had a couple of PhD students working on this topic, so please look at the papers of Okiemute Ogirigbo and Joseph O Ukpata .

Thanks to all for your answers

I agree with Dr. Leon Black.

Useful information.