Physical-Mechanical Design Basics of Plaster Mortars for Aerated Concrete Masonry
Normative requirements (compression strength and bending strength, adhesion to the masonry) for plastering mortars for finishing of walls made of autoclaved aerated concrete in theEU countries Ukraine, Russia are contradictory and not always substantiated. The plaster mortar is to be considered as a coating connected withmasonry through the contact zone. Thedesign of compositions and properties of plaster mortars should be carried out with due regard for stresses occurring in the plastering coating becauseof its shrinkage and the differenceof deformations with masonry as well as deformations of the wall structure and the coating itself. Components of the mix and their number should beselected with due regard forthe processes taking place in the course of plaster coating hardening and destruction of the “masonry-plaster coating” system. The result of selectingthe composition should ensurethe reducing of stresses in the plaster coating and contact zone up to values lesser than the destructive stress.