Strengthening of heritage buildings by means of grout injection-problems and solutions

Abstract eng:
Large part of heritage buildings in Slovenia was built with stones or mixture of stones and bricks, as up to 20th century the local stone represented the cheapest and most accessible building material. An efficient technique for improving mechanical properties of the walls of such building is grout injection. Because of lack of knowledge of the morphology and type of walls, incompatibility of existent and applied materials and errors during application, mistakes and even damages may occur. That is why methodology of work and criteria to achieve required quality should be defined. Based on the results of the extensive test campaign, chemical, physical and mechanical criteria for selecting optimal grout mixture are given and also guidelines and research needed to assess the condition and type of walls that could be strengthened by means of grout injection and to ensure the quality of executed work are presented.

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