Análisis comparativo del comportamiento Mecánico entre una base estabilizada con cemento y una base estabilizada con cemento más adición de Fibras vegetales
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2020-06
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Universidad de Guayaquil - Facultad de Ciencias Matemáticas y Físicas Carrera de Ingeniería Civil
Resumen
Esta investigación está orientada al análisis comparativo del comportamiento de una base cementada con fibra vegetal de abacá y una base cementada normal, para lo cual se realizó la selección del porcentaje óptimo de cemento a implementarse de acuerdo al tipo de material con ensayos de laboratorio, la investigación se inició con un caracterización del material de base de acuerdo a las especificaciones del MTOP.
El cemento que se utilizo fue proporcionado por la empresa HOLCIM S.A, el cual fue de base vial Tipo MH (Baja calor de Hidratación), el cual se testeo en porcentaje de 3, 4, y 5% respectivamente y adicional la fibra vegetal de abacá en porcentajes del 0,5 al 1% del peso de la muestra con una longitud de 20 y 25 mm, valores referenciales de varios trabajos investigativos realizados. Se elaboró un muestro de 42 especímenes (30 cilindros y 12 vigas). Una vez realizadas las pruebas se evalúan la capacidad portante de soporte, mediante los ensayos de Proctor Modificado e índice de CBR y la resistencia a la flexión y compresión con las especificaciones de las normas ASTM – C39 y ASTM C78, comprobando con roturas a los especímenes a los 7, 14 y 28 días respectivamente. Se verifico que en las bases cementadas se logró sobrepasar la resistencia esperada en un 42% según los parámetros referenciales, en cambio las elaboradas con adición de fibra, la resistencia a la compresión y flexión disminuyeron, pero la matriz de sus partículas se mantuvo unida.
This research is oriented to the comparative analysis of the behavior of a cemented base with vegetable fiber of abaca and a normal cemented base, for which the selection of the optimal percentage of cement to be implemented according to the type of material with laboratory tests was made, the investigation started with a characterization of the base material according to the specifications of the MTOP. The cement that was used was provided by the company HOLCIM S.A, which was of Type MH (Low Heat Hydration) road base, which was tested in percentage of 3, 4, and 5% respectively and additional vegetable fiber abaca in percentages of 0, 5 to 1% of the weight of the sample with a length of 20 and 25 mm, reference values of various research works carried out. A sample of 46 specimens (30 cylinders and 16 beams) was made. Once the tests have been carried out, the supporting capacity is evaluated by means of the tests of Proctor Modified and CBR index and the resistance to bending and compression with the specifications of the ASTM standards C39 and ASTM C78, checking the specimens for breakage at 7, 14 and 28 days respectively. It was verified that in the cemented bases they were able to exceed the expected resistance by 42% according to the referential parameters, in which they had added with fiber the resistance to compression and bending, but the matrix of its particles remained united.
This research is oriented to the comparative analysis of the behavior of a cemented base with vegetable fiber of abaca and a normal cemented base, for which the selection of the optimal percentage of cement to be implemented according to the type of material with laboratory tests was made, the investigation started with a characterization of the base material according to the specifications of the MTOP. The cement that was used was provided by the company HOLCIM S.A, which was of Type MH (Low Heat Hydration) road base, which was tested in percentage of 3, 4, and 5% respectively and additional vegetable fiber abaca in percentages of 0, 5 to 1% of the weight of the sample with a length of 20 and 25 mm, reference values of various research works carried out. A sample of 46 specimens (30 cylinders and 16 beams) was made. Once the tests have been carried out, the supporting capacity is evaluated by means of the tests of Proctor Modified and CBR index and the resistance to bending and compression with the specifications of the ASTM standards C39 and ASTM C78, checking the specimens for breakage at 7, 14 and 28 days respectively. It was verified that in the cemented bases they were able to exceed the expected resistance by 42% according to the referential parameters, in which they had added with fiber the resistance to compression and bending, but the matrix of its particles remained united.
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Palabras clave
Análisis, Capacidad Portante, Base Cementada, Fibra Vegetal