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https://nap.nationalacademies.org/catalog/27432/critical-issues-in-transportation-for-2024-and-beyond

EFECTO DE LA TEMPERATURA DE PRUEBA Y LA RESISTIVIDAD ELECTRICA HUMEDA EN CILINDROS DE CONCRETO

La presente investigación incluye los resultados experimentales obtenidos con cilindros de concreto (10 cm x 20 cm) fabricados en sitio con materiales de la region, manteniendo lo solicitado en las especificaciones del proyecto ejecutivo del Nuevo Viaducto de Progreso, Yucatan, en Mexico. Las pruebas se realizaron en el Laboratorio Quimico (LQ), de la Coordinacion de Ingenieria Vehicular e Integridad Estructural (CIVIE) del Instituto Mexicano del Transporte (IMT). Se monitoreo la resistividad electrica humeda (REH) por un periodo aproximado de 300 dias, al termino del cual, se recortaron los cilindros en cuatro rodajas, y se procedio a realizar otras pruebas, a saber: permeabilidad rapida de cloruros, porcentaje total de vacios y absorcion capilar de agua (cuyos resultados se presentaron en la publicacion tecnica num. 512 del IMT). Se observaron cambios significativos en el valor de REH durante el monitoreo, aparentemente debido a los cambios de temperatura. Por lo tanto, se solicito el registro de la temperatura ambiente a las estaciones meteorologicas del Instituto Nacional de Investigaciones Forestales, Agricolas y Pecuarias (INIFAP). Estos registros incluyeron los valores minimo, maximo y promedio diarios. Con los valores de REH y las temperaturas de las estaciones meteorologicas, se realizo un analisis de correlacion usando las leyes de Arrhenius para determinar los factores de correccion a considerar para valores de la REH si la temperatura ambiente no se controla en el laboratorio. Los resultados preliminares muestran una correlacion aceptable entre la temperatura ambiente y la REH medida. Abtract: The present investigation includes the experimental results obtained with concrete cylinders (10 cm x 20 cm) manufactured in situ, with materials from the region, in line with the specifications established in the executive project of the New Viaduct in Progreso, Yucatan, Mexico. Tests were performed at the Chemical Laboratory (LQ), of the Coordination of Vehicle Engineering and Structural Integrity (CIVIE) of the Mexican Transportation Institute (IMT). Wet electrical resistivity (REH) was monitored over a period of approximately 300 days. After this period, the cylinders were cut into four slices, performing other tests: rapid permeability of chlorides, total percentage of voids and capillary water absorption (results of which were presented in the IMT’s technical publication No. 512). Significant changes in the REH value were observed during monitoring, apparently due to temperature changes. Therefore, the registration of the ambient temperature was requested to the meteorological stations of the National Institute of Forestry, Agriculture and Livestock Research (INIFAP). These records included the minimum, maximum and average daily values. With the values of REH and temperatures of the meteorological stations, a correlation analysis was performed using the Arrhenius laws to determine the correction factors that should be considered for values of the REH if the ambient temperature is not controlled in the laboratory. The preliminary results show an acceptable correlation between the ambient temperature and the measured REH.

Language

  • Spanish

Media Info

  • Media Type: Web
  • Features: Bibliography; Figures; Tables;
  • Pagination: xiv+31p
  • Serial:
    • PUBLICACION TECNICA
    • Issue Number: 543
    • Publisher: Instituto Mexicano del Transporte
    • ISSN: 0188-7297

Subject/Index Terms

Filing Info

  • Accession Number: 01701727
  • Record Type: Publication
  • Source Agency: Instituto Mexicano del Transporte
  • Files: ITRD
  • Created Date: Apr 11 2019 3:26PM