Definitions for "Pozzolan"
A siliceous or siliceous and aluminous material which by itself possesses little or no cementitious value but that will, in finely divided form and in the presence of moisture, chemically react with calcium hydroxide at ambient temperatures to form compounds which exhibit cementitious properties. Pozzolans can be man-made such as fly ash, or naturally occurring.
a finely-divided material that reacts with calcium hydroxide and alkalies to form compounds possessing cementitious properties
a material that reacts in the presence of water with an activator such as lime, Portland Cement or kiln dust, to produce a cementitious material