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Effect of the water saturation degree of aggregates on concrete shrinkage

Author(s): R. Cortas, E. Rozière, A. Loukili, A. Hamami, S. Staquet
Paper category: Conference
Book title: 2nd International Conference on Microstructural-related Durability of Cementitious Composites
Editor(s): Guang Ye, K. van Breugel, Wei Sun and Changwen Miao
Print ISBN: 978-2-35158-129-2
e-ISBN: 978-2-35158-123-0
Publisher: RILEM Publications SARL
Pages: 324 – 331
Total Pages: 8
Language: English

Abstract: This work consists in studying the effect of the water saturation of aggregates on the development of shrinkage and the potential risk of cracking of concrete. Different concretes were obtained from a given concrete mixture by changing only the degree of saturation of porous gravels. Three degrees of saturation were studied, namely: 0% (dry aggregates), 50% (partially saturated aggregates) and 100% (saturated aggregates). From the experimental results, the early age behaviour and the mechanical properties of the concrete strongly depend on the degree of water saturation of aggregates. As a consequence, the potential risk of cracking of these different concretes should be different. These results highlight the fact that the concept of the effective water remains theoretical; because it does not take account the kinetics of water absorption of aggregates and the hydration of the cement.

Key words: Aggregates, saturation rate, concrete, shrinkage.

Online publication: 2012
Publication Type: full_text
Public price (Euros): 0.00

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