Effect of temperature and resting time on rheological properties of lime based grouts

Cultural heritage is an irreplaceable resource and the symbol, identity of humanity and societies. The preservation of the historical buildings that form the majority of this heritage has great importance. In the historical buildings, repair and strengthening of the building should be done after the necessary tests are performed and the building identity is determined without damaging the original structure and integrity. The discontinuities, cracks and gaps formed in the masonry walls, especially in historical masonry structures, prevent the building to work monolithically. For this reason, historical buildings need different repair and strengthening techniques compared to today's constructions. One of the most widely used methods of repairing and strengthening historic structures is the grout application. By this method, it is aimed to solve the discontinuity between the elements in multi-leaf masonry walls and to work integrally by filling the cracks and cavities. The fresh properties of the grout are the most important parameters for good quality and accurate injection. These properties are called rheological properties and allow filling of cracks and voids by providing sufficient injectability. Parameters such as plastic viscosity and shear stress, which give information on the rheological properties of the grout, can be determined in the laboratory. These parameters are influenced by external factors such as temperature and time. Studies on the effect of temperature and resting time on the rheological properties of grout were observed to be inadequate. In this study, the rheological properties of grout used in the repair and reinforcement of damaged historical structures were investigated under different environmental temperature and time effects. In this study firstly, information about the literature was given and the missing parts in the literature were revealed. For experimental studies, three different types of grouts were produced in accordance with the original material properties of historical structures and parameters such as fluidity, volume stability and penetration were investigated. Rheological parameters such as plastic viscosity and shear stress of these grouts were determined by using a rotational rheometer under different temperature and time effects. Thus, it is planned that this study will shed light on the rheological properties that affect the behavior of grout. In the last part of the thesis, the data obtained from all studies were discussed. The results were interpreted and recommendations were made.