Estudio de las propiedades mecánicas que presenta un concreto geopolimero a base de ceniza de cascarilla de arroz producida en el departamento del Meta y reforzado con fibra de acero

Abstract

This project was carried out through the elaboration of forty (40) cylinders and eight (8) beams based on rice husk with steel fiber reinforcement, and ten (10) cylinders and two (2) joists with conventional concrete, complying with the regulations specified in the regulatory framework; developing and running in the city of Villavicencio-Meta, using rice husk ash from Cereales del llano S.A mill, ARGOS cement and Sika Fiber CHO 65/35 steel fiber.

With this project the modules of elasticity and poisson relation are defined, thrown by tests of compression stress, the rupture modules were determined through the tests carried out to flexion and a comparison was made between the mechanical properties presented by the Conventional concrete with respect to those of geopolymer concrete based on rice husk ash and reinforced with steel fiber, to check the improvement of mechanical behavior, (Compression and bending).

Rice husk ash (RHA) contributed to the increase in compressive strength in concrete, as the steel fiber did in percentages less than or equal to 1%. The modulus of elasticity increased for rice husk-based cylinders with steel fiber reinforcement, and the poisson ratio decreased. The modulus of rupture in the beams subjected to bending at 28 days increased with this new type of concrete improving the distribution of stresses in the concrete matrix. All the results of the cylinders were analyzed at the age of 60 days of curing, because at lower ages this concrete based on rice husk with steel fiber reinforcement had inferior results in the mechanical properties analyzed with respect to conventional concrete.