Title: Present State and Future of Alkali-Activated Slag Concretes
Author(s): B. Talling and J. Brandstetr
Publication: Symposium Paper
Appears on pages(s): 1519-1546
Keywords: activators; alkalies; binders (materials); blast furnace slag; compressive strength; concretes; corrosion; costs; microstructure; reviews; silicates; slag cements; Materials Research
Presents the latest publications dealing with the development and practical application of activated slag clinker-free concretes with special reference to less known papers and recent information. The finely ground slag, usually granulated blast furnace slag, is activated by the solution of sodium or potassium hydroxide, carbonate, or preferably silicate (soluble glass) of appropriate concentration and silicate modulus. The difference of microstructure between portland cement concrete and alkali-activated slag concrete and its consequences for their properties, especially for very high strengths and corrosion resistance, is discussed. The use of nonstandard aggregate and other industrial by-products, as well as the low costs of this type of concrete are presented. Examples of applications of alkali-activated slag concrete of different composition are given. Some problems connected with the present use of alkali-activated concrete are discussed together with the most promising applications for the future.