pozzolanic cement

The setting of pozzolanic cements has much in common with setting of their modern counterpart, Portland cement.

This material, known as pozzolanic cement, was used in the construction of the Roman Colosseum and Pantheon.

Some examples of such usage are dimension stone (as an altered volcanic tuff), lightweight aggregate, pozzolanic cement, and soil conditioners.

Pozzolanic cements and cements using more than 60% of slag as aggregate are more resistant to sea water than pure Portland cement.

At present, there is no way of ascertaining what water/cement ratios the Romans used, nor are there extensive data for the effects of this ratio on the strengths of pozzolanic cements.