PHYSICAL-MECHANICAL ANALYSIS OF MORTARS MADE BY REPLACING WATER WITH HOMEMADE WATERPROOFING BASED ON BURNT OIL AND LIME

Abstract

The objective of this research was to analyze the physical and mechanical properties of mortars produced by partially replacing mixing water with a homemade waterproofing additive at proportions of 10% and 20%. Three mortar mixtures (0%, 10%, and 20%) were prepared and evaluated through water absorption, capillarity, and compressive strength tests. The results showed that the mortar containing 20% waterproofing additive exhibited notable improvements in impermeability, significantly reducing both water absorption and capillary action, while achieving a compressive strength of 236.36 kg/cm2. In contrast, the 10% proportion did not produce relevant changes in capillarity and showed lower compressive strength compared to the 20% mixture. Statistical analysis using ANOVA, Levene’s test, and Tukey’s HSD test confirmed the existence of significant differences among the groups. Furthermore, the use of the homemade waterproofing additive, formulated from lime and used oil, represents an ecological and cost-effective alternative to industrial additives, as it promotes the reuse of polluting waste and reduces environmental impact. It is concluded that the use of a 20% homemade waterproofing additive is viable for applications requiring high structural performance and enhanced impermeability, particularly within the context of sustainable construction.