ABSTRACT
The article presents the main results of experimental and theoretical research into the effect of grouting on the physical and mechanical properties of historic masonry. The subject of research are masonry structures of brickwork, natural stone (sandy marlstone, sandstone, limestone, trachyte) and mixed masonry with different degrees of binder degradation and polymer- and mineral-based grouting agents. The effect of grouting is verified through analyses including strength, modulus of elasticity and some other physical characteristics (porosity, absorption capacity). The research is carried out on segments of masonry structures with dimensions of 300×450×420 mm (brick masonry), 550×650×750 mm (stone and mixed masonry). Individual sets of test pieces differ by the degree of binder degradation. Depending on the characteristics of the grouting agent the grouting is performed either as low-pressure or jet grouting. The current research is also aimed at verifying special grouting mixtures developed at the researcher’s workplace, based on mineral substances with nanoparticles.
