Expanded slate
Expanded slate is one of the light aggregates and is made from crushed slate clay. When fired, it is inflated perpendicular to the plane of the cleavage. In contrast to expanded clay , the grains have a platy shape.
Due to its low density of 0.6 to 1.8 kg / dm³, the expanded slate is particularly suitable for the production of lightweight concrete with good thermal insulation. Compared to gravel or sand, however , the inherent strength of expanded slate is lower. Further applications are as an open-pored, water-storing substrate in gardening and landscaping, as a beam fill and as winter grit.
Norms and standards
- DIN EN 13055 - Light aggregates
Individual evidence
- ^ Balder Batran: Expertise in construction . Handwerk und Technik Verlag, Stuttgart 2002, ISBN 3-582-03503-4 , p. 145 .