Ingeniería Civil y Mecánica

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Subject: search.filters.subject.HORMIGÓN TRADICIONAL

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    Análisis comparativo de la resistencia a la compresión del hormigón con adición de virutas metálicas y un hormigón con materiales tradicionales
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Civil, 2024-02) Acosta Villacres, Edwin Manuel; Peñafiel Valla, Lourdes Gabriela
    The purpose of this experimental work is to offer an alternative to commercial products in which it seeks to verify if metal chips can be used in a mixture to enhance the physical and mechanical characteristics of concrete, in order to take advantage of those generated in some workshops. of turning in Ambato. Two dosages of compressive strength = 240 and 280 kg/cm2 were carried out, where percentage of metal chips were added in 5, 10 and 15 percent, specific tests of fine aggregate, coarse aggregate and cement were carried out, in addition The determination of the real density of these for the selection of the chip was based on investigative background which were spring-shaped chips of 5 cm in length, the analysis of the mechanical resistance of the concrete was carried out at 7, 14 and 28 days based on the NTE INEN 1573 standard The results were compared between the concrete of the standard specimens and the specimens with metal shavings in the percentages already mentioned, they showed an improvement in the dosage of 280 kg/cm2 that incorporated 5 percent, increasing its resistance by 113.46 percent, for the dosage of 240 kg/cm2 there was no increase, but the resistance was maintained within the permitted ranges, however for the percentages of 10 and 15 percent of metal chips in both dosages its resistance decreased, obtaining a very weak concrete.
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    Comportamiento a flexión del hormigón tradicional frente a un hormigón en base a PET reciclado y fibras de bagazo de caña de azúcar
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Civil, 2021-09) Villacrés Yépez, Jhojaan Alexander; Castro Solorzano, Fidel Alberto
    In this experimental work the reuse of materials as they are proposed; recycled PET plastic and cane bagasse fibers, which replace a percentage of the total weight corresponding to coarse aggregate, in the dosage and elaboration of traditional concrete beams. The technical, economic and environmental behavior of the proposal was analyzed through controlled bending laboratory tests and its cost comparison of these alternative materials compared to traditional ones in the local market. Technically, it was found that the traditional concrete specimens reinforced with 5 and 7 percent recycled PET plastic have mechanical properties according to the NTE-INEN standard for non-structural elements. The cane bagasse fibers did not meet the standards, with a maximum of 1.5 percent fiber addition being the best result. The economic analysis showed that concrete with PET reinforcements is competitive with traditional concrete.
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    Análisis de propiedades mecánicas de hormigón translúcido con diferentes porcentajes de fibra óptica para uso en elementos estructurales.
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Civil, 2021-09) Atencio Hinojosa, Hebert Steven; Chérrez Gavilanes, Diego Sebastián
    To carry out the present experimental work, it began with the collection of materials: stone aggregates from the city of Latacunga-San Buenaventura, Type GU cement, Viscomix 410L superplasticizer additive and 125 umm fiber optic. Next, the tests corresponding to the materials were carried out following INEN and ASTM standards in the Materials Testing Laboratory of the FICM. With the results obtained, we proceeded to dose using the optimal density method for traditional concrete and making corrections according to the ACI for self-compacting and translucent concrete. Regarding compression resistance, translucent concrete with 4 percent was the one that had the best performance compared to 3 and 5 percent, with values at 7, 14 and 21 days of 17.2, 24.4 and 32.4 Mpa respectively. With these results, the optimal percentage (4 percent) with which the beams were manufactured is determined. The flexural test indicates that the modulus of rupture at 7 and 14 days (1.81 and 2.69 Mpa) is lower than those obtained with traditional concrete (2.12 and 2.76 Mpa) and selfcompacting (2.81 and 3.99 Mpa), however, at 21 days (3.79 MPa) it has a flexural strength greater than traditional concrete (3.27 MPa) but less than self-compacting concrete (4.21 MPa). Finally, it follows that translucent concrete with the optimum percentage of 4 percent can be used as a structural material.
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    Estudio comparativo de la resistencia a flexión de vigas convencionales con vigas reforzadas con resina poliester liquida
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Civil, 2020-10) Chugchilan Chimborazo, Nelson Hermógenes; Navarro Peñaherrera, Carlos Patricio
    The present research work consists of working with different conventional concretes and replacing the fine aggregate materials and water with similar amounts of liquid polyester resin. Then, it is expected that with these new polymer concretes the flexural strength will increase. In order to establish the dosages of conventional concrete, the A.C.I. method was used, additionally it was corroborated with laboratory tests for each of the stony materials, the tests carried out were: granulometry test, apparent density, compacted and loose, real density, capacity absorption, real density of the cement and the concrete slump test. With the specimens the compression test was carried out at 7, 14 and 21 days after curing, thus obtaining the strengths of 210, 240 and 280 kilograms per square centimeter. In addition, the resin helps conventional concrete to improve its chemical and mechanical properties, thus forming polymeric concrete. After that, with the new concrete obtained, the flexural strength test was carried out with a load applied to thirds of the span in each of the manufactured beams. Finally, using the Mander and Park method, the calculation of the MomentCurvature diagram of each beam of both normal and polymeric concrete was carried out, to perform an analysis of each of the curves obtained and establish that there is an increase in resistance to the flexion when working with resin since the modulus of rupture is higher compared to that of the other specimens.