In terms of its particle density, bottom ash Grobalith® is comparable with natural and synthetic lightweight aggregates. It has irregularly ruptured, porous, coarse surfaces and is suitable for the production of light masonry mortar, light concrete products and light bricks, which are typified by low weight and good heatin sulating features. Other fields of application for bottom ash Grobalith® include earth work and road construction, as well as backfilling, embanking and soil conditioning measures.