Mineral lightweight renders of modified composition for final facade surface treatment

摘要

The intention of the research presented in this article was to study the basic physico-mechanical parameters of mineral lightweight renders. Both alternative and primary raw materials were used to modify the filling agent; namely utilized quartz sand, diatomite and hydrophobised perlite. Determining and evaluating the basic parameters of plasters with the modified composition enabled to assess the effect of substituting the filling agent within the particular designed formulas. Emphasis was placed on the parameters in the fresh and hardened conditions of the plasters – workability, water volume, density, compressive and flexural strength. It was found that by appropriately adjusting the water dosage then better parameters could be obtained than in the reference formula – commonly commercially produced renders.