pozzolan

1 9.5

A natural or man-made material that mixes with lime to make concrete stronger and last longer

noun
/ˈpɑːzəˌlæn/

Specialized

: puzolana

Many engineers recommend using pozzolan to reduce the risk of cracking in concrete structures.

Examples

The addition of pozzolan to concrete can significantly improve its strength and durability.
Builders frequently use pozzolan to enhance the performance of their concrete mixtures.
Hummers will also visit your winter ash dump to use the pozzolan along with the spider web when building their nests.

Academic text (1999)

How Pozzolanic

pozzolan

Specialized

1 9.5

inert

Specialized

1 7.1

Surface Forms

pozzolan singular

pozzolans plural

Etymology

Pozzolan comes from the Italian place Pozzuoli, where builders used local volcanic ash called pozzolana to make very strong Roman concrete. That's why a pozzolan means a material like 'volcanic ash' that works with lime to make cement and concrete stronger and last longer.