Lehčené materiály na bázi metalurgických strusek

Abstract

This diploma work deals with slas alkali activation issue, and with alkali activation of blast furnace slag in mainly. Blast furnace slag and steel slag make up the largest portion of byproducts in an integrated steel mill. Granulated blast furnace slag has a vitreous structure and exhibits cementitious properties. Presently, ground grenulated blast furnace slag is widely used as a cement replacement around the world. The concrete containing ground blast furnace slag usually has longer setting times, lower early strenght, but shows higher later strength, denser microstructure and betterdurability compared with the Portland cement concrete. The potential cementitious properties of granulated blast furnace slag can be effectively activated by using alkaline activators. Researchers have confirmed that clinkerless alkali-activated blast furnace slag cements, can exhibit higher strengths, denser structure, and better durability than Portland cement. The work quotes many experimental works, which confirm properties of blast furnace slag cements activated independently or with addition of fly ash.