Facultad de Ciencias Matemáticas Físicas y Químicas

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Browsing Facultad de Ciencias Matemáticas Físicas y Químicas by Author "Álava Basurto, Yamil Adrián"
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    Análisis comparativo de resistencia a la compresión de base estabilizada con cemento utilizando distintos especímenes
    (Universidad Técnica de Manabí, 2023) Álava Basurto, Yamil Adrián ; Zambrano Loor, Junior Antonio ; Eguez Álava, Hugo
    This research project was carried out with the purpose of investigating the physical behavior and using as an effect the base stabilized with cement using different specimens when it comes to being able to measure its resistance to compression, whose granulometric characteristics have to comply with the specifications by means of the INEN 696 and 697 test (AASHTO T-11 and T 27) as a class 1A basis, put to all the tests that have been carried out in the facilities of the laboratories of the companies Megarok S.A located in the city of Portoviejo and Holcim Ecuador Guayaquil for obtain results of the characterization of the main material, of the type of mixture and resistance, emphasis was placed on the determination of the physical properties of the granular material extracted from the Megarok quarry and selected as a class 1A base, this material was mixed with Holcim cement type GU normalized by NTE INEN 2380 and 4 cement contents of 4.0, 5.0, 5.5 and 6.0% were tested for the The three types of specimens detailed below, 150x300 mm, 100x200 mm and 100x115 mm. Once the mixture with a GU type Holcim cement content was obtained, it was taken for compaction using a Dewalt hammer (electric) and six specimens made up of three teams of two partners, working with 4.0, 5.0, 5.5 and 6.0% cement, a division of tests was also considered, emphasizing the physical and resistant behavior of the BAEC at different ages of its respective initial dosage, in short, tests will be carried out at 7 and 28 days of its initial compaction in its respective specimens. The comparative analysis of the compression resistance of the BAEC using different specimens was studied, performing simple laboratory tests on cylinders mentioned above, resulting in their behavior, characteristics and physical properties. In total, 48 ASTM D 1633 and ASTM C 1435 compaction tests and ASTM C39 compressive strength tests were carried out, 40 NTE INEN-ISO 7963 ultrasonic pulse tests, 1 INEN 696 and 697 granulometry tests, 1 Atterberg limit test using UNE 103103 and UNE 103104, 1 Modified Proctor 26 test ASTM D-1557 and 1 CBR test using NTE INEN 685, in addition to 8 tests to obtain the static modulus of elasticity in 150x300 mm cylinders at different ages and percentages of cement. In the tests it was observed that the BAEC has an effect of increasing the bearing capacity of the soil and considerably the physical properties in general. The effect of compressive strength gave better results, mainly in the 100x200 mm specimens where the mixture had a cement percentage of 6% and compacted almost at the same time that the mixture was ready, later there may be situations where the compaction is not adequate, considerably reducing the physical properties of the BAEC, other qualities to obtain good resistance is to determine the exact amounts of the components. In general terms, the best conditions of compressive strength, workability and compaction were obtained in the medium specimens of 100x200 mm for a GU type cement content of 5.5%.