Mortar mixture for thermal insulation and/or as fire protection and for universal applications, and methods for the production and use thereof

A method for preparing a mortar mixture, comprising:

• glazed, closed-cell balls selected from the group consisting of expanded silica, expanded perlite and a combination thereof, having a compressive strength of 0.7-5.0 N/mm2 and support grains from silica sand filling at least 20% of a volume;
• and,
• a binder formed as an aqueous polymer dispersion filing at least a portion of a remaining volume of said volume, thereby yielding a reinforcing and finishing plaster in a pasty form,
• said method comprising the steps of:
• sorting perlite sand by particle size distribution in a trickle channel;
• glazing the perlite sand in multi-stage temperature zones for creating said glazed, closed-cell balls;
• preparing a homogeneous mixture of said glazed, closed-cell balls with one or more grain sizes, the homogeneous mixture of said glazed, closed-cell balls comprising a volume of 20% or more of said mortar mixture and having a compression strength of 0.7 to 5.0 Nmm2;
• adding cellulose;
• adding an air-voids foaming agent;
• adding a binder;
• and,
• creating a homogenous mixture for yielding a reinforcing or finishing plaster for use as a mortar mixture.