Análisis del hormigón reforzado con fibras de cabuya al 0.5%, 0.75% y 1% con tratamiento químico : componente A: Análisis del hormigón reforzado con fibras de cabuya al 0.5% con tratamiento químico.

Abstract

This study aims to evaluate the resistance of cylinders to compression, as well as the resistance of beams to bending and deflection; in both cases, made of concrete reinforced with cabuya fibers at 0,5% by weight of the coarse aggregate, compared to those made with pattern concrete, given that the cabuya fibers give the concrete improved mechanical properties. These fibers were cut to a length of 4 cm and treated with 6% de concentración sodium hydroxide. Three cylinders were made for each type of concrete and for curing time, except for pattern concrete cylinders for 7 days after curing, which only 2 were made, having a total of 11; the cylinders were evaluated after starting curing. Two pattern concrete beams were made for each curing time; however, 3 fiber-reinforced concrete beams were made for each curing age; the beams were evaluated 7 and 28 days after the curing procedure. After 7 days of the start of curing, the concrete cylinders with fibers needed greater applied force for contraction than those of pattern concrete, but after 28 days said resistance of the former was lower compared to the latter. After 7 days of curing, all beams obtained similar flexural strengths; however, on day 28, the fiber-reinforced concrete beams resisted greater flexure than those made of pattern concrete. It was concluded that the sodium hydroxide treatment increased the time to rupture and elongation, also decreased linear density, humidity and toughness, as well as increased the resistance to degradation; in addition, fiber-reinforced concrete obtained lower compression resistance in cylinders; and greater resistance in beams to both flexure and deflection.