Effect of the curing conditions of concrete on the behaviour under freeze-thaw cycles

Al‐Assadi, Ghaida and Casati Calzada, María Jesús and Fernandez Gomez, Jaime Antonio and Gálvez Ruiz, Jaime (2011). Effect of the curing conditions of concrete on the behaviour under freeze-thaw cycles. In: "Conferencia Ibérica de Fractura e Integridade Estrutural 2010", 17/03/2010 - 19/03/2010, Oporto, Portugal. ISBN ISSN 8756-758X.

Description

Title: Effect of the curing conditions of concrete on the behaviour under freeze-thaw cycles
Author/s:
  • Al‐Assadi, Ghaida
  • Casati Calzada, María Jesús
  • Fernandez Gomez, Jaime Antonio
  • Gálvez Ruiz, Jaime
Item Type: Presentation at Congress or Conference (Article)
Event Title: Conferencia Ibérica de Fractura e Integridade Estrutural 2010
Event Dates: 17/03/2010 - 19/03/2010
Event Location: Oporto, Portugal
Title of Book: Proceedings of Conferência Ibérica de Fractura e Integridade Estrutural 2010. Fatigue and Fracture of Engineering Materials and Structures
Date: July 2011
ISBN: ISSN 8756-758X
Volume: 34, is
Subjects:
Freetext Keywords: concrete;freeze–thaw cycles;cement hydration;porosity;curing of concrete
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ingeniería Civil: Construcción
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The aim of this work is to relate the curing conditions of concrete and the addition of an air-entraining admixture with the damage caused by freeze–thaw cycles. In countries with a continental climate, the curing of concrete in summer is performed under climatic conditions of high temperature and low humidity, and during the winter the concrete suffers conditions of freeze–thaw, often accompanied by the use of de-icing salts. This paper shows the experimental results of the behaviour of concrete specimens cured under climatic summer conditions (high temperature and low humidity) and then subjected to freeze–thaw cycles. Curing of the specimens includes conditions of good and bad practice in relation to wetting and protection of the concrete. It also examines the effectiveness of using an air-entraining admixture in both cases. The experimental programme includes an evaluation of the mechanical properties of the concrete, the study of the cement hydration and the measurement of the volume and pore sizes of the concrete. These tests were performed before and after the application of the freeze–thaw cycles. The results obtained showed that the specimens without air-entraining admixture show a deterioration of mechanical properties after the freeze–thaw test. However, the inclusion of air bubbles benefits the behaviour of concrete against freeze–thaw cycles so even better mechanical properties after the test were observed. This anomalous behaviour is because the cement hydration process continues over the freeze–thaw tests, closing the pore structure. This aspect has been confirmed with the DTA and TG tests performed

More information

Item ID: 7002
DC Identifier: http://oa.upm.es/7002/
OAI Identifier: oai:oa.upm.es:7002
Official URL: http://onlinelibrary.wiley.com/doi/10.1111/j.1460-2695.2010.01520.x/full
Deposited by: Memoria Investigacion
Deposited on: 15 Jul 2011 09:44
Last Modified: 04 Jun 2018 14:35
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