Microstructural and Permeability Properties of Alkali-Activated Slag Concrete

摘要

The study consists of a series of experimental investigations concerning the microstructural and permeability properties of alkali-activated slag concrete. The object of study is the so-called F-concrete. F-cement is finely ground slag to be activated by a combination of alkali metal compounds and rendered consistent in its fresh state by means of lignosulphonates. According to the results the hardened slag paste is very dense, but the structure contains microscopic cracks due to hydration shrinkage. The effect of the cracks on the permeability properties was found to be significant. On the basis of strength results it is possible to produce F-concrete with very good mechanical properties. (Copyright (c) Valtion teknillinen tutkimuskeskus (VTT) 1987.)