Study of the damage evolution of the concrete under freeze-thaw cycles using traditional and non-traditional techniques

Romero Mendoza, Héctor Leonardo; Casati Calzada, María Jesús; Gálvez Ruíz, Jaime; Molero, Miguel y Segura Pérez, Ignacio (2011). Study of the damage evolution of the concrete under freeze-thaw cycles using traditional and non-traditional techniques. En: "13th International Congress on the Chemistry of Cement", 03/07/2011 - 08/07/2011, Madrid, España. p. 486.

Descripción

Título: Study of the damage evolution of the concrete under freeze-thaw cycles using traditional and non-traditional techniques
Autor/es:
  • Romero Mendoza, Héctor Leonardo
  • Casati Calzada, María Jesús
  • Gálvez Ruíz, Jaime
  • Molero, Miguel
  • Segura Pérez, Ignacio
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: 13th International Congress on the Chemistry of Cement
Fechas del Evento: 03/07/2011 - 08/07/2011
Lugar del Evento: Madrid, España
Título del Libro: Proceedings of 13th International Congress on the Chemistry of Cement
Fecha: 2011
Materias:
Escuela: E.T.S.I. Caminos, Canales y Puertos (UPM)
Departamento: Ingeniería Civil: Construcción
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

Some experiments have been performed to investigate the cyclic freeze-thaw deterioration of concrete, using traditional and non-traditional techniques. Two concrete mixes, with different pore structure, were tested in order to compare the behavior of a freeze-thaw resistant concrete from one that is not. One of the concretes was air entrained, high content of cement and low w/c ratio, and the other one was a lower cement content and higher w/c ratio, without air-entraining agent. Concrete specimens were studied under cyclic freeze-thaw conditions according to UNE-CENT/TS 12390-9 test, using 3% NaCl solution as freezing medium (CDF test: Capillary Suction, De-icing agent and Freeze-thaw Test). The temperature and relative humidity were measured during the cycles inside the specimens using embedded sensors placed at different heights from the surface in contact with the de-icing agent solution. Strain gauges were used to measure the strain variations at the surface of the specimens. Also, measurements of ultrasonic pulse velocity through the concrete specimens were taken before, during, and after the freeze-thaw cycles. According to the CDF test, the failure of the non-air-entraining agent concrete was observed before 28 freeze-thaw cycles; contrariwise, the scaling of the air-entraining agent concrete was only 0.10 kg/m 2 after 28 cycles, versus 3.23 kg/m 2 in the deteriorated concrete, after 28 cycles. Similar behavior was observed on the strain measurements. The residual strain in the deteriorated concrete after 28 cycles was 1150 m versus 65 m, in the air-entraining agent concrete. By means of monitoring the changes of ultrasonic pulse velocity during the freeze-thaw cycles, the deterioration of the tested specimens were assessed

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ID de Registro: 12544
Identificador DC: http://oa.upm.es/12544/
Identificador OAI: oai:oa.upm.es:12544
Depositado por: Memoria Investigacion
Depositado el: 07 Ago 2012 09:39
Ultima Modificación: 21 Abr 2016 11:48
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