Properties of Mortars with Recycled Stone Aggregate for the Reconstruction of Sandstone in Historic Buildings

The research concerned the mortars with recycled stone aggregate used for reconstruction of historic objects. face walls is exposed to atmospheric, chemical, and biological factors, causing its destruction. aim was develop a mortar that would be compatible both in terms external appearance as well physical mechanical properties. For this purpose, three based on sandstone different gradations were prepared. compatibility tested properties resistance salt frost corrosion. reflect offer great opportunities adjust them desired. consistent, practically no weight loss after 25 test cycles. They achieved lower compression strength than stone, which an important feature avoiding destruction by using excessively strong mortar. Moreover, absorbability turned out favorable (max. 25%). Mortars resistant destructive effect did not show ability whitewash desalinate.