Análisis de fisuración con corriente de aire inducido en placas de hormigón reforzado con fibras de palma africana 0.5% bajo tratamiento químico: hormigón armado con fibras naturales con tratamiento químico para detener su degradación.

Abstract

This curricular integration work seeks to reduce cracks in concrete slabs reinforced with African palm fiber treated with 4% Sodium Hydroxide (NaOH). This phenomenon is called plastic shrinkage, it is produced by the accelerated drying of the concrete slabs. Controlled conditions were imposed for all plates. Plates were made with African palm fiber (0.5% and 0.75%), replacing the coarse aggregate with percentage by mass. This work in regard to fibers was guided in ACI 544 1R (2002) where several recommendations for both natural and synthetic fiber reinforced concrete can be found. Chemical treatment with 4% NaOH was performed. The fiber was left for 24 hours with the chemical so that it completes its complete chemical treatment. Plates, cylinders and beams were made at 0.5%. The plates were tested for around 7 hours under controlled conditions in the wind tunnel, the cylinders and plates were tested at 28 days respectively. The cylinders had resistances greater than 210kgf/cm2 After this, the deep cracks that occurred in the concrete plates reinforced with African palm were measured. These had a range of 1.5 to 2 [cm], it was also possible to see cracks that crossed the plate. Finally, it was possible to conclude that the fiber helped to reduce cracking, the entire procedure is detailed in the following document.