Plaster and wall ties

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Plaster and wall binder (abbreviation MC) is a finely ground hydraulic binder for plaster mortar and normal masonry mortar in accordance with DIN EN 413-1 . By adding aggregates and water, it is processed into mortar on the construction site.

Essential components are Portland cement , rock flour and additives that facilitate processing ( air-entraining agents , concrete liquefiers , retarders ) and sometimes hydraulic lime . The addition of inorganic pigments is permitted, but not the addition of organic pigments.

Plaster and wall ties harden , like all hydraulic binders, not only in the air, but also under water.

Plaster and wall ties are divided into three compressive strength classes. The minimum compressive strength after 28 days is set at 5, 12.5 or 22.5 N / mm² and must be specified in a standard-compliant designation. The absence of air entraining agents is indicated by the letter X. MC 12.5X means for example: plaster and wall ties of compressive strength class 12.5 without pore-forming agents.


  • Jens Krass, Gerhard Rupp, Bärbel Mitransky: Basics of construction technology. Vieweg + Teubner, Wiesbaden 2009, ISBN 978-3-8351-0053-4 , pp. 264-265.

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