Are there any suggestions for references about the relation between porosity and void ratio in concrete?

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Florian Glodeanu

Voids ratio is defined as the ratio of the volume of voids to the volume of solids Porosity is defined as ratio of the volume of voids to the total volume. http://www.intelligentcompaction.com/downloads/IC_RelatedDocs/SoilCmpct_Basic%20definitions%20of%20Soils.pdf

Article The relationship between porosity and strength for porous concrete

Mohammed Salah Nasr

Interesting question.

Shams Ul Islam

Excellent explanation by @ Florian Glodeanu

Yousif Salam Saeed

It is clear that porosity is defined as ratio of the volume of voids to the total volume while, voids ratio is defined as the ratio of the volume of voids to the volume of solids.

Ahmed Mahdi

Following.

Muhammad S. Elfeky

Quiet clear explanation from Florian Glodeanu thanks to him