Argamassa reforçada com fibra de caroá sob diferentes tipos de cura.

Abstract

Mortar reinforced with caroa fiber under different types of curing. In the growing search for renewable materials that are less harmful to the environment, vegetable fibers appear as an alternative to synthetic fibers. In view of this, this work aimed to evaluate the addition of the caroá fiber in natura in the formulation of mortars with contents of 0, 2 and 3%. Of addition of fiber in its mixture. The 1: 3 mass ratio was adopted, using Portland CP V ARI cement, with a water / cement factor between (0.50 and 0.80). The fibers were analyzed mechanically by the tensile strength test, the mortars were subjected to two types of curing (conventional and hydrothermal). Mortars were tested in the hardened state using the 3-point bending test. The mechanical characterization of the caroá fibers showed that it has a tensile strength equivalent to vegetable fibers already used, such as sisal. The effect of curing under pressure at an average temperature of 100 ° C and 120 Kgf of pressure was proven in composites with the addition of caramel fibers. Analyzing the results at 14 days, it was found that the composites with 3% addition of fibers showed good results of tension in relation to the composites with 0 and 2% addition regardless of the type of cure. Therefore, it appears that although the results are positive, one should try to adjust the curing parameters for a better performance of the composites added with fibers.