Utilization of repair mortar for the loss compensation of Hungarian porous limestone

Abstract

Different ready-made, commercially available (in Hungary) stone repair mortars and laboratory mixed, newly designed mortars were tested under different conditions in the laboratory. the mortars had different aggregate and binder content. the aim of the research was to understand the influence of the different binders and various amounts of limestone aggregate on the properties of mortar. During the laboratory tests more than 550 specimens were analyzed according to the en standards. Pure repair mortars have higher strength and lower capillary activity than the Hungarian porous limestones. Added aggregate can increase the compatibility of the commercially available mortars, but at some mortars it may result a drastic decrease in strength. newly designed mortars have similar mechanical and hydrotechnical properties to the tested porous limestones.