Desarrollo de un material compuesto sostenible con adherencia mejorada para el reforzamiento de estructuras de edificación.

Abstract

In this study, an FRCM (fabric reinforced cementitious matrix) composite system produced with fabrics of sisal fibres and a Portland cement mortar matrix was developed. This material was applied to RC beams and columns as a strengthening system. Additionally, four different techniques of com- posite application were analysed to reduce debonding problems that frequently occur between this strengthening material and the substrate. For assessing the effectiveness of the system and its bon- ding capacity, a total of 32 specimens of beams and columns were subjected to three-point bending and eccentric compression tests, respectively. The results show that RC elements reinforced with the FRCM composites exhibited an increase in resistance of up to 71, 16 % in columns and 71,80 % in beams, compared to non-strengthened elements. More over, when using an anchoring technique to apply the composites, deformation capacities ofup to 61,60 % in the columns and up to 80,30 % in the beams were achieved, and in all cases, a premature failure caused by the delamination of the strengthening system was avoided.