Physical–mechanical behavior of cement and lime mortars with mixed aggregate of sand and crushed recycled glass

Mortars made of mixed cement and lime (mixed mortar) have good mechanical behaviour and improve adhesion to other materials. In this study, mixed mortars have been prepared and characterized with a partial replacement of 25% of the natural aggregate by recycled crushed glass. The physical and mechanical properties have been evaluated and the ultrasonic transmission rates have been determined. The Student's t -test was used to statistically analyze the outcomes. Internal structures and potential mineralogical alterations were analyzed by SEM. The characteristics of these mortars were compared with those of reference ones. The resistance results have revealed an improvement of the mixed mortar with glass compared to the reference mixed mortar of 14% in bending and 10% in compression. Moreover, a decrease in Young's modulus has been shown in mixed mortars with glass in comparison with the reference mixed mortars, although the addition of glass does not imply statistically significant differences.