Ingeniería Civil y Mecánica

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Subject: search.filters.subject.PENETRÓMETRO DE CONO

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    Análisis comparativo entre los valores del límite líquido obtenidos por copa de casagrande y penetrómetro de cono para suelos granulares del cantón Ambato, provincia de Tungurahua
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Civil, 2021-03) Ramírez Maiquiza, Silvia Maribel; Pérez Maldonado, Ruth Lorena
    Currently, in the soil mechanics laboratories of Ecuador, the Casagrande cup method is the best known to determine the liquid limit of the soils standardized by ASTM D4318, while some countries use the Cone Penetrometer established by British Standard BS 1377-2:1990. A comparative analysis was carried out between these methods and not having this equipment to perform the tests in the laboratory, was designed and assembled at the INDUACCS company in Ambato, according to the specifications of BS 1377-2:1990 standard, then test trials were conducted that provided adequate results. For the tests, soil samples were taken in the 18 parishes of Ambato canton, obtaining a total of 30 specimens, which were used for laboratory tests; with the results was made a comparative statistical analysis between the values of the liquid limit obtained by testing the Casagrande cup and the Cone Penetrometer, for this analysis was applied the statistical method of minimum squares. Based on the results and analysis, it demonstrated that the alternative method using the Cone Penetrometer built in this research, is acceptable to obtain liquid limit values of granular soils, it is also important to mention that the methods have a strong positive correlation (r = 0.8228).
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    Análisis comparativo entre los valores del límite líquido obtenidos por copa de casagrande y penetrómetro de cono para suelos finos del cantón Pastaza, provincia de Pastaza
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Civil, 2021-03) Pilatasig Murillo, Lisbeth Solange; Portilla Yandún, Favio Paúl
    In this research work, 30 samples of fine soils were used, which were extracted from different sectors of the city of Puyo, in order to perform a comparative analysis among liquid limit values using the Casagrande cup method (ASTM D 4318-2010) and the Cone Penetrometer method (British standard BS 1377-2: 1990). The last equipment (not available in the laboratory) was manufactured according the specifications of the mentioned standard. In addition, Atterberg limits, plasticity index, SUCS and AASHTO classifications and specific gravity of each of the samples were determined, to correlate them each other. Once the results of the tests were obtained, the data was tabulated, analyzed and interpreted. In order to verify the hypothesis raised, statistical methods were used to determine the level of correlation of the liquid limit values obtained by both methods. Thus, the hypothesis is fulfilled by presenting a good correlation coefficient of 0.81. In this way, the use of the ‘manufactured’ cone penetrometer is considered as a feasible and alternative method for obtaining liquid limit of fine soils. The correlation equation is LL cone = 1.13 LL cup - 2.10. Besides, conversion factors of 0.9179 and 0.9199 were determined to approximately calculate LLcup knowing the value of LLcone.