Fly ash

LFHCM-1101

Siliceous fly ash is a fine powder of mostly spherical particles with puzzolanic properties (it reacts in the presence of water with dissolved calcium hydroxide to form strength-developing calcium silicate and calcium aluminate compounds). It is obtained by electrostatic or mechanical deposition of the pulverulent particles contained in the combustion gases from thermal power plants. Used as a raw material for the composite cements preparation , it gives them special properties (low hydration heat, resistance to sulphate attack, development of strength after 28 days).