Per: PALOMA SUELLEN LIMA DE SOUSA (UFPA), sarah gabrielly brandão de souza (ufpa), joelly vera nascimento (ufpa), damares da cruz barbosa nascimento (ufpa), Alisson clay rios da silva (ufpa), veronica scarpini candido (ufpa)
Abstract:
Mortar is a fundamental component in civil construction, used to lay floors, bricks and other functions such as waterproofing, etc. When exposed to high temperatures, the resistance of the mortar decreases considerably, altering its properties. The present work explores the behavior of cementitious materials under thermal variations, focusing on the analysis of volumetric shrinkage, deformation, and compressive strength. The mortar specimens were prepared with Portland CP II cement, natural sand, and water, and after 28 days of curing, they were exposed to temperatures of 25°C, 250°C and 350°C for 60 minutes, followed by temperature tests. compression. The results indicated a significant reduction in compressive strength and an increase in volumetric shrinkage with increasing temperature. It is concluded that thermal variations negatively impact the durability of mortar structures, and relief strategies, such as the addition of pozzolanic additives, are necessary to improve thermal resistance and ensure the safety and durability of constructions.