Estudio de caracterización de los agregados del río Chicama con fines de construcción. Sector Coina. Usquil. Otuzco. La Libertad. 2019
No Thumbnail Available
Date
2021
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Universidad Nacional de Trujillo
Abstract
El proyecto de investigación “Estudio de caracterización de los agregados del río Chicama con fines de construcción. Sector Coina. Usquil. Otuzco. La Libertad. 2019.” Surgió ante la necesidad de conocer el estudio de caracterización de los agregados que se extraen del río Chicama en el sector de Coina y consecuentemente saber si estos satisfacen los requisitos establecidos en la NTP 400.037 para ser utilizados en la elaboración de concreto. El objetivo principal fue realizar el estudio de caracterización de los agregados y los objetivos específicos fueron: Determinar las propiedades físicas, químicas y mecánicas de los agregados, determinar el porcentaje de contaminación con materia orgánica del agregado fino, realizar un diseño de mezclas de un concreto con una resistencia de 210 kg/cm2 y finalmente elaborar probetas de 10 x 20 cm para el ensayo de resistencia a la compresión. Se determinó las propiedades físicas, mecánicas y químicas utilizando los métodos establecidos en la normativa técnica peruana, en el diseño de mezclas se utilizó el método del AC211 y en la parte estadística se utilizó la norma ACI 214R , los ensayos desarrollaron en el laboratorio de construcciones rurales, laboratorio de concreto y reciclado y en el laboratorio LASACI de la Universidad Nacional de Trujillo. De las propiedades físicas, químicas y mecánicas de los agregados, el agregado fino cumple con los requisitos de granulometría, sin embargo tiene un porcentaje de contaminación por materia orgánica de 3.63 % y carbón o lignito de 1.16, los cuales están por encima de lo establecido por la NTP 400.037; el agregado grueso presentó una desviación en la granulometría en el tamiz de ½”, donde el porcentaje mínimo según norma debe ser 90% y del agregado en estudio fue de 87.042%, el porcentaje de desgaste por abrasión fue de 17.9% y según norma puede ser hasta 50%. Se obtuvo el diseño de mezclas y luego se elaboraron las probetas de concreto que fueron ensayadas a los 7, 14, 21 y 28 días, obteniendo resistencias promedio de 150.5, 179.2, 218.3 y 245.2 kg/cm² respectivamente; es decir se alcanzó de forma satisfactoria la resistencia de diseño.
ABSTRACT The research project “Characterization study of the Chicama river aggregates for construction purposes. sector Coina. Usquil. Otuzco. Freedom. 2019. " It arose from the need to know the characterization study of the aggregates that are extracted in the Coina community and consequently to know if they meet the requirements established in the NTP 400.037 to be used in the preparation of concrete. In this project, the main objective was to carry out the characterization study of the aggregates and the specific objectives were: Determine the physical, chemical and mechanical properties of the aggregates, determine the percentage of contamination with organic matter of the fine aggregate, carry out a design of mixtures for concrete with a resistance of 210 kg / cm2 and finally elaborate specimens of 10 x 20 cm to determine the compressive strength. To determine the physical, mechanical and chemical properties, the methods established in the Peruvian technical regulations were used, for the design of mixtures the AC211 method was used and for the statistical part the ACI 214R standard was used, the tests were carried out in the laboratory of rural constructions, concrete and recycling laboratory and in the LASACI laboratory of the National University of Trujillo. The physical, chemical and mechanical properties of the aggregates were determined, the fine aggregate meets the granulometry requirements, however it has a percentage of contamination by organic matter of 3.63% and carbon or lignite of 1.16, which are above what established by the NTP 400.037; the coarse aggregate presented a small gap in the granulometry on the ½ ”sieve, where the minimum percentage according to the standard must be 90% and the aggregate under study was 87.042%, the percentage of abrasion wear was 17.9% and according to the standard it can be up to 50%. The design of mixtures was carried out and then the concrete specimens were elaborated that were tested at 7, 14, 21 and 28 days, obtaining average strengths of 150.5, 179.2, 218.3 and 245.2 kg / cm² respectively; that is, the design strength was satisfactorily achieved.
ABSTRACT The research project “Characterization study of the Chicama river aggregates for construction purposes. sector Coina. Usquil. Otuzco. Freedom. 2019. " It arose from the need to know the characterization study of the aggregates that are extracted in the Coina community and consequently to know if they meet the requirements established in the NTP 400.037 to be used in the preparation of concrete. In this project, the main objective was to carry out the characterization study of the aggregates and the specific objectives were: Determine the physical, chemical and mechanical properties of the aggregates, determine the percentage of contamination with organic matter of the fine aggregate, carry out a design of mixtures for concrete with a resistance of 210 kg / cm2 and finally elaborate specimens of 10 x 20 cm to determine the compressive strength. To determine the physical, mechanical and chemical properties, the methods established in the Peruvian technical regulations were used, for the design of mixtures the AC211 method was used and for the statistical part the ACI 214R standard was used, the tests were carried out in the laboratory of rural constructions, concrete and recycling laboratory and in the LASACI laboratory of the National University of Trujillo. The physical, chemical and mechanical properties of the aggregates were determined, the fine aggregate meets the granulometry requirements, however it has a percentage of contamination by organic matter of 3.63% and carbon or lignite of 1.16, which are above what established by the NTP 400.037; the coarse aggregate presented a small gap in the granulometry on the ½ ”sieve, where the minimum percentage according to the standard must be 90% and the aggregate under study was 87.042%, the percentage of abrasion wear was 17.9% and according to the standard it can be up to 50%. The design of mixtures was carried out and then the concrete specimens were elaborated that were tested at 7, 14, 21 and 28 days, obtaining average strengths of 150.5, 179.2, 218.3 and 245.2 kg / cm² respectively; that is, the design strength was satisfactorily achieved.
Description
Keywords
Abrasión, Agregado, Cemento, Concreto, Resistencia, Curado, Diseño de mezclas