Vitruvius specifies a ratio of 1 part lime to 3 parts pozzolana for cements used in buildings and a 1:2 ratio of lime to pulvis Puteolanus for underwater work, essentially the same ratio mixed today for concrete used at sea.
Do sredine 1. stoletja je bil material, ki se ga je pogosto uporabljalo kot opeko betonskega videza, čeprav so razlike v agregatu dovoljevale drugačno ureditev materialov.