The aim of the doctoral dissertation was to define the framework for sustainable renovation ofudheritage buildings, particularly of the building envelope as the most exposed part. Theudresearch was focused on the damage that could be caused by climate change or seismic loads.udAs a part of the laboratory tests, several mortar and injection grout compositions based onudcalcium binders with or without mineral additives, suitable for renovation and/orudstrengthening of the building envelope were designed and tested. It was found that mineraludadditives such as limestone powder, slag and tuff have a beneficial effect of on the propertiesudof mortars and injection grouts. In continuation, the brick wallets were built with developedudmortars and the influence of freeze/thaw cycles on their mechanical properties and durabilityudwas evaluated. The wallets built with lime or lime-slag mortar were able to withstand at leastud50 freeze/thaw cycles without any effect on their mechanical properties, while after 150udfreeze/thaw cycles, the damage was reflected in the reduction of modulus of elasticity. In situudtest performed on a stone masonry building enabled us to evaluate the quality andudeffectiveness of grout injection (using cement or cement-lime grouts) as the chosenudsustainable strengthening procedure. The results of the performed seismic analysis based onudthe experimentally obtained mechanical properties of masonry showed, that in the case of theudtype of walls under consideration, an adequate level of seismic resistance can be achieved alsoudby using combined cement-lime grouts, which are more suitable for strengthening of heritageudbuildings.
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