Zeolites are aluminosilicate materials that possess a crystalline structure characterized by an interlinked three-dimensional framework of AlO4 and SiO4 tetrahedra. This framework contains open cavities in the form of channels and cages, leading to the designation of zeolites as molecular sieves. The characteristics of molecular sieves enable zeolites to have high adsorption capacity, ion exchange capability, and catalytic properties, which also contribute to improving indoor environmental quality. Zeolites also exhibit pozzolanic reactivity due to their high silica content. These chemical and physical properties of zeolites offer the potential to produce a lime-based mortar with improved mechanical performance, which can also contribute to the physical conditions of the environment with its hygroscopic behavior. For this purpose, under the scope of the research, the pozzolanic reactivity of zeolite obtained from the Manisa Gördes region of Türkiye has been evaluated first. After establishing the pozzolanic property of zeolite, mortar alternatives with different pozzolan/binder ratios, curing conditions, and aggregate sizes are investigated through a combination of physical and mechanical testing methods. Clinoptilolite-type natural zeolite in the form of powder and aggregates, which vary between 0-7 mm (0-2 mm, 2-4 mm, 4-7 mm) particle size, and class CL 90 – S type slaked lime were used to produce zeolite based lime mortars. The different particle sizes of zeolite aggregates were added to increase the moisture adsorption capacity of the mortar.