A wide variety of pozzolan options are available to you, such as acid-proof, sulfate resistant, and anti-algae. You can also choose from 52.5, 32.5r, and 42.5. As well as from portland pozzolan cement, cement clinker, and oil well cement. And whether pozzolan is low-heat, or moderate heat. There are 259 pozzolan suppliers, mainly located in Asia.