“Analysis of the Physical and Mechanical Properties of mortars with Titanium Dioxide Additions.”

Abstract

The construction sector continuously seeks materials that improve the durability and performance of structures. This study evaluates the effect of adding food-grade Titanium Dioxide TiO2 on the physical and mechanical properties of cement mortars. Mixtures were prepared with TiO2 substitutions of 0%, 0.5%, 1.0%, and 1.5% by weight of cement. The specimens were subjected to tests for compressive strength, absorption, capillarity, permeability, and resistance to accelerated weathering (freeze-thaw cycles). The results indicate that the addition of TiO2 positively influences the long-term compressive strength (28 days), showing a significant increase at 1.5% TiO2. Likewise, a reduction in water absorption and the capillary coefficient was observed, especially at the 1.5% dosage, suggesting a densification of the mortar matrix. Permeability showed variable behavior, while weathering resistance improved notably, with a reduction in the degradation of the specimen edges as the percentage of TiO2 increased. It is concluded that TiO2, particularly at 1.5%, acts as an efficient modifier of the mortar microstructure, enhancing its durability and mechanical strength, thus positioning it as a promising additive for the production of high-performance mortars.