Building materials

Sand-lime bricks, aerated concrete, mortar, plaster - as a weather-resistant building material and effective binder, lime is an indispensable allrounder in building construction and civil engeneering.


Lime product applications

Lime product applications

  • Sand-lime brick
    Sand-lime bricks are made from a predefined mixture of the main ingredients quartz, sand and lime. In this process, quicklime and sand are intensively mixed and the subsequent addition of water causes the quicklime to react to form hydrated lime. Raw blocks are then molded from the lime and sand mixture and hardened by the action of heat and steam under pressure. After cooling, the sand-lime bricks are ready for use.
    SCHAEFER KALK supplies lime products for this purpose with consistent quality and precisely defined reaction times that guarantee a reliable production process.
  • Aerated concrete
    Like sand-lime brick, aerated concrete is a steam-cured building material. It is produced by mixing fine white lime with quartz-containing powdered stone. A measure of aluminum powder is added to this, which when subjected to steam under pressure releases hydrogen into the alkaline lime environment. The hydrogen is what creates the fine bubble structure that accounts for the favorable thermal properties of aerated concrete.
    SCHAEFER PRECAL® guarantees the basis for consistently high-quality building materials through a fine-tuned adjustment of the reactivity curve.
  • Mortars and plasters
    No building would be imaginable today without the bonding together of individual building material elements. SCHAEFER PRECAL® improves the workability of mortars and adhesives, helping to hold the individual bricks securely together.
    SCHAEFER PRECAL® improves the properties of base plasters. This allows the creation of attractive and flat surfaces. In the case of finishing plasters, SCHAEFER PRECAL®'s outstanding purity and whiteness also positively influences the optical appearance of the plaster.
    Interior plasters made with SCHAEFER PRECAL® provide lasting benefits in naturally regulating interior moisture, thus creating a healthy indoor climate.
    SCHAEFER PRECAL® is used for bonding and reinforcing mortars as building lime, pursuant to EN 459-1, and for interior and exterior use as an adhesive and for reinforcing ETIC systems.
Hans-Günther Brendl

Your contact person

Hans-Günther Brendl
Sales Manager PRECAL

Telephone: +49 (0) 6432 503 - 107
Telefax: +49 (0) 6432 503 - 269