Skip navigation

Lime stones

Lime stone

Lime stones have a white color. They are pressure resistant and have a high bulk density. They can also be produced as frost-proof stones.

Essential stages of lime stone production

Lime stone production

1. Lime and sand are stored in the silo factory. The raw materials are dosed by weight - for example, in the mixing ratio lime: sand = 1: 12 -, mixed intensively and passed into reactors via a conveyor system.

2. In the reactor, the burnt lime is extinguished under water consumption to hydrated lime. If appropriate, the material must be mixed in the remixer on press moisture.

3. With fully automatic presses, the blanks are formed and stacked on a hardening cart.

4. The hardening of the blanks is then carried out under a steam pressure at a temperature of about 200 ° C. of about four to eight hours depending on the stone format.  During the hardening process, silica is dissolved from the surface of the quartz sand grains by the steam vapor atmosphere. With the binder hydrated lime, the silicic acid forms crystalline binder phases - the CSH phases - which grow on the sand grains and interlock them firmly. The structures of lime, sand and water formed during the production process are responsible for the fact that the lime stone has a solid structure.

5. After hardening and cooling, the lime stones are ready for use.

Back to: 1.3. Masonry of artificial stones