Experimental Investigation on Masonry Mortar by Using Waste Material

This study examines the viability of blended lime-cement mortars as an alternative to blended lime-natural hydraulic lime mortars in restoration projects, given the limited availability of natural hydraulic lime in many regions compared to cement. The research emphasizes the pore structure of both types of mortars and its impact on water transport properties, early mechanical strength, and compatibility risks. The effects of binder type, binder composition, and binder-to-aggregate ratios on pore structure were analyzed. Cement was found to have a more pronounced influence on the mechanical and water transport characteristics of the mortars compared to hydraulic lime, which affects their compatibility. Based on the findings, lime-cement mortars can be a feasible option, provided the cement content exceeds 25% of the total binder mass to enhance early strength but remains below 50% to preserve compatibility. However, the mortar containing 25% natural hydraulic lime demonstrated the most promise for use in restoration efforts.