Trass lime

Trass lime

Trass lime is a mixture of hydrated lime or marsh lime and ground trass. The term trass is derived from the Dutch tyrass (= putty, glue).

DEVELOPMENT: Trass rock was formed on the earth's crust by volcanic eruptions or meteorite impacts. Together with lime and water, trass lime forms a natural ecological binder.

HISTORY: Already the Romans used Rhineland trass in the 3rd century A.D., for example for the Cologne-Trier water pipeline, the city walls of Cologne and various buildings in Bonn. Trass lime is also known under the term Roman cement.


MANUFACTURING: Trass lime is mixed with gravel and water to form an earth-moist mass. Then, layer by layer, approx. 12-17cm each are poured into a formwork (see concrete formwork) and compacted by means of pneumatic tampers or vibrating plate. After drying for 12-24 hours, the formwork can be removed and the material can dry out completely. Components can be prefabricated or produced on site.

- Own aesthetics and haptics
- Natural ecological binder - Low grey energy demand
- Similar strength to concrete - High density and therefore mass
- Potential storage capacity