Ingeniería Civil y Mecánica

Permanent URI for this communityhttp://repositorio.uta.edu.ec/handle/123456789/898

Browse

Has files: YesSubject: search.filters.subject.CONCRETO

Search Results

Now showing 1 - 3 of 3
  • No Thumbnail Available
    Item
    Resistencia a compresión del hormigón preparado a partir de materiales reciclados
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Civil, 2023-03) Mayorga Amaguaya, Larot David; Peñafiel Valla, Lourdes Gabriela
    The present investigation seeks to solve the great problem of contamination generated by waste from the construction sector with reference to demolitions and debris generated in cities, applying the reuse of these same materials to reduce the volume towards dumps, which direct sustainable constructions. The percentage of recycled concrete aggregate that can be partially replaced by coarse natural aggregate and its influence on compressive strength was determined. For this, recycled concrete from tested cylinders, sidewalk residues, among others, was collected; the properties of the aggregates were obtained according to the INEN and ASTM standards; Subsequently, the dosage was carried out by the Optimum Density Method for a resistance of 210 kilograms per square centimeter with the replacement of percentages of recycled aggregate from 10, 15, 30, 60 and 100 percent according to the weight of the coarse aggregate, and at its At the same time, concrete specimens prepared in the traditional way were made for the comparison of their resistance. In this way, it was identified that the greater the amount of recycled aggregate, its compressive strength decreases, evidencing that it is feasible to make replacements with percentages lower than 30 percent, since both 10 and 15 percent present favorable design values such as 214.54 and 211.57 kilograms. per square centimeter at 28 days.
  • No Thumbnail Available
    Item
    Comparación de la resistencia a compresión entre el hormigón simple y el hormigón reforzado con fibra de carbono
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Civil, 2023-03) Tisalema Tasigchana, Carlos Alberto; Ureña Aguirre, Maritza Elizabeth
    This experimental work arises due to the lack of studies involving carbon fibers as reinforcement for concrete and its influence on the compressive stress, so, this research compares the compressive stress between a group of cylinders made with simple concrete and with another made of the same type of concrete, but reinforced with a carbon fiber coating, in order to analyze the benefits of the use of the fiber. The research is experimental, because I compare two groups of concrete cylinders by applying compression tests based on ASTM C39 and NTE INEN 1573 standards. The tests were carried out with a total of 30 cylinders designed for a compressive stress of 210 Kg per square centimeter using the "Optimum Density" method of the Central University of Ecuador. Positive results were achieved with respect to compressive stress, showing that carbon fiber reinforced concrete increases the compressive stress, obtaining an increment of 16.11 percent at 7 days, 17.04 percent at 14 days, 17.94 percent at 21 days and 18.01 percent at 28 days, compared with the traditional concrete, proving that it is feasible to use carbon fiber as a compressive reinforcement in concrete.
  • No Thumbnail Available
    Item
    Análisis de la resistencia a compresión del concreto expuesto a fuego, elaborado a base de talco industrial como remplazo parcial del agregado fino
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Carrera de Ingeniería Civil, 2017) Moreno De la Cruz, Daniel Eliecer; Frías Torres, Alex Xavier
    In this project the intention is to provide technical information about the influence of use industrial talc as a partial replacement of fine aggregate in concrete mixtures, by the preparation and testing of test pieces, using materials from our area and Holcim cement. With materials previously selected and analyzed, test mixtures were prepared by adding and varying the amount of industrial talc, guided by the procedure applied by the current NTE INEN standards. For the dosage of calculated 210Kg / cm², 2 specimens were tested, the same ones that were tested at 7 days of age. From the analysis of these results and the respective readjustments, the design of mixtures with replacement of industrial talc by fine aggregate and the heat treatment tests (temperature rise), compression test at 28 days of age. From these values, the mixture was selected with the highest percentage of industrial talc, it should be clarified that this experimental work was oriented to obtain the best residual resistance of the concrete exposed to a thermal shock (abrupt change in temperature). The dosage that gave the best results to the simple compression after the thermal shock is the one that contains 20% of industrial talc as partial replacement of the fine aggregate. After the heat shock test at 28 days of age a residual resistance of 104.11 Kg / cm², was obtained at a temperature of 500 ° C.