Improving the mechanical properties of hydrated lime and cement mortars using powdered Bayburt stones and zeolite

This thesis is focusing on the manipulation of fresh and hardened state properties of hydrated lime and cement mortars using powdered Bayburt stones and zeolite for their more compatible and appropriate use in masonry construction. Damages that occur during and after the constructions using cement and hydrated lime mortars are defined and the disadvantages of the using these mortars are noted to investigate whether the required properties of these mortars could be manipulated to remedy the problematic applications of these mortars in masonry construction. In this study, zeolite that obtained from Manisa/ Gördes and Bayburt Yellow, Bayburt White, Bayburt Green stones obtained from Bayburt are used. In order to increase the pozzolanic properties and to be comparable to zeolite, similar particle size distribution for Bayburt stones are obtained to zeolite. Mix design calculations for the experiments were carried out based on the standards the % of 2,5, 5, 10, 20, 30, 40 and 50 replacement levels for both binders found to be suitable. For each replacement level, 6 cube and 3 beam samples were cast. Compressive and flexural strength measurements were done at 14th, 21th and 28th days for cement and at 28th, 56th and 91th days for hydrated lime mortars. All the other experiments were carried out at the fresh state of the mortars. When the results are studied, it was found out that the properties of hydrated lime and cement mortars can be manipulated using powdered Bayburt stones and zeolite and have elucidated the problems stated at the beginning of this thesis. According to the experimental results, the replacement levels of both zeolite and Bayburt stones resulted in %60 increase in strength, 4 times higher increase in transfer sorptivity and therefore 4 times lower decrease in time to dewatering, %40 improvement in setting time and manipulation of consistency is observed. Compressive strength of cement mortars using zeolite and Bayburt stones is decreased by %65 compared to the control cement mortar and was also observed that setting time and consistency could be manipulated when zeolite and Bayburt stones are used.