This thesis studies mixing non-structural injection grouts using different mixers and its influence on properties on a fresh mixture and on hardened mortar. The research was conducted for restoration and conservation purposes. The selected electric mixers included the laboratory RILEM-CEN mixer, a kitchen mixer and a rotary hammer drill. As a last type of mixing non-structural injection grouts we choose a hand mixing, which is the most used method of mixing in Slovenian restoration and conservation practice. The tests were made with an injection grout based on hydrated lime, because lime-based mixtures have the best compatibility with historical architectural surfaces in need of restoration due to their physical and chemical composition. Furthermore, the injection grout consisted of quartz sand, a superplasticizer based on polycarboxylate polymers and of water. After examining the literature and the set criteria, which the non-constructive mixtures should achieve for successful restoration, preliminary investigations were carried out. Based on the preliminary results, we tried to achieve an appropriate ratio of the mixture components. Further investigations were conducted using standardized methods, which were occasionally modified. The recommendations of Biçer-Şimşir and Rainer were also followed. The rotary hammer drill produced the mixtures with the best results. In addition to providing good results, the rotary hammer drill is also advantageous for the use out in the field.
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