Testing methods for pozzolanas (Practical Action Brief) - Appropedia .
Feb 27, 2008 . Generally, a pozzolana will contain silica, alumina, iron oxide and a .. strength and 28 day strength should hold good for a variety of mixes . Compression testing is carried out on a strain controlled testing machine at a constant strain . A small laboratory mill able to crush hard rocks to a size of 100µm is.