DYNA JOURNAL ENGINEERING

Key words:

Hormigón, fibra de coco, módulo de ruptura, concrete, coconut fiber, modulus of rupture.

Article type:

ARTICULO DE INVESTIGACION / RESEARCH ARTICLE

Section:

RESEARCH ARTICLES

ABSTRACT
Concrete is a brittle material and low resistance due to their lack of ability to withstand deformation. These limitations could be overcome by incorporating a reinforcement, as natural fibers. The objective of this study was to analyze the effect of the coconut fibers and treated untreated PMMA on the flexural strength of concrete mixtures, as a substitute of part of a fine aggregate proportion of 2.5, 5 and 10% in volume. For this, we determined optimum design of concrete mixture to a water / cement ratio of 0.48, then the mixtures were prepared with untreated coconut fibers averages two lengths (3-4 cm; 5-6cm) and treated with PMMA (= 4cm). The results showed that the use of long-sized fibers in the various proportions yielded better results in tensile bending that mixtures with short size fibers and fiber treated. The highest values were obtained for blends with 2.5% of fibers, the size and any treatment. The tensile strength in bending of the mixtures at different temperatures exhibited markedly decreases when the temperature is above 200 ° C.