Abstract
In this experimental study, a detailed investigation was carried out on the physical, mechanical, and especially the shrinkage characteristics of cementitious repair mortars with the use of ground pumice in with 0/100 μm and 0/2 mm grain sizes. In the experimental analysis, the effects of the use of pumice aggregate in fine and coarse sizes on the density, porosity, compressive strength, flexural strength, elasticity properties and drying shrinkage values of the repair mortar were analyzed in detail. In mixtures with pumice component, the ratio of fine:coarse pumice, 20:80, 30:70, 40:60, 50:50, 60:40, 70:30 and 80:20 by weight were used in mixtures, respectively. Although the drying shrinkage rates of test specimens were determined at a relatively higher value than the control mortar, the shrinkage values of all pumice aggregate repair mortar specimens were within the value range stipulated by the relevant standards. It was determined that the shrinkage amount of the specimens in which coarse size pumice aggregate was used more in mortar mixtures was lower than the shrinkage amount of the specimens with fine size pumice aggregate. This situation was associated with the porosity rate of the mortar, and the shrinkage of the mortars with higher porosity was determined to be lower.
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