Comparison of the Performance of Gypsum and Lime in Building Coatings

Torrel Silva D.F.; Infante Inca A.G.A.; Carhuanambo Villanueva J.T. · Proceedings of the LACCEI international Multi-conference for Engineering, Education and Technology (2026) · DOI: 10.18687/laccei2026.1.1.464

Resumen

In this study, gypsum and lime were used as alternative coating materials in construction, with the aim of comparing their performance in construction coatings by evaluating their compressive strength, water absorption, and specific gravity at addition ratios of 16%, 22%, 50%, and 70% relative to the amount of cement. This objective was achieved using an applied, experimental methodology with a quantitative approach, aimed at comparing the performance of gypsum and lime as binders in construction coatings at proportions of 16%, 22%, 50%, and 70%. Forty cylindrical mortar specimens were prepared, divided equally between mixtures containing lime and those containing gypsum. The samples were cured for 7, 14, and 28 days and subjected to tests for compressive strength, water absorption, and bulk density, conducted in the laboratory of the Universidad Privada del Norte. The results showed that the maximum compressive strength was obtained with 16% gypsum (4,245 kg/cm2) and with 16% lime (5,337 kg/cm2), indicating that intermediate percentages optimize structural performance. Regarding water absorption, the lime-based mortars had values between 16.67% and 23.00%, and the gypsum-based mortars between 16.38% and 24.04%, demonstrating that lime offers greater stability against moisture. In conclusion, lime is more suitable for exterior coatings, while plaster is better suited for dry interior surfaces due to its superior workability and surface finish.

Instituciones: Universidad Privada del Norte