Entwicklung hydraulischer Bindemittel mit rheinischen Braunkohlenfilteraschen

The aim of this thesis has been the development of a masonry cement according to DIN 4211 including a high content of lignite fly ash (BFA). These demands are nearly fulfilled by a mixture of an average “Rheinisch” BFA with cement clinker, blast furnace slag and different admixtures. The investigated fly ash is originated from a power plant, fired with mixed lignite.
Verifying the recipe, using a selection of ashes and clinkers with different compositions provided positive results. The prerequisite for this target is the careful arrangement of components.
With a suitable selection of ingredients and correct dosage of admixtures it is possible to produce a masonry cement with up to 40 percent BFA.
As a result of the ashes’ self hardening properties we are able to reduce the amount of cement clinker. Due to ecological and economical reasons this seems useful. So like other well tried secondary sources, e.g. fly ash from hard coal or blast furnace slag, the BFA is suitable for utilisation in building materials, too.