Effect of the water saturation of aggregates on the shrinkage induced cracking risk of concrete at early age |
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| Affiliation: | 1. L’UNAM Université, Institut de Recherche en Génie Civil et Mécanique, GeM-UMR CNRS 6183, Centrale Nantes, 1 rue de la Noe, BP 92101, F-44321 Nantes Cedex 3, France;2. Service BATir, Université Libre de Bruxelles, Brussels, Belgium;3. Service 4MAT, Université Libre de Bruxelles, Brussels, Belgium;1. College of Civil and Transportation Engineering, Hohai Univ., No. 1, Xikang Rd., Nanjing 210098, China;2. Jiangsu Engineering Research Center of Crack Control in Concrete, No.1, Xikang Rd., Nanjing 210098, China;3. Nanjing Engineering Research Center for Prefabricated Construction, No.1, Xikang Rd., Nanjing 210098, China;1. Université Libre de Bruxelles (ULB), BATir, LGC, Avenue F.D. Roosevelt 50 CP194/02, 1050 Bruxelles, Belgium;2. Université Paris Est, IFSTTAR, Boulevard Newton, 77447 Marne la Vallée Cedex 2, France;1. Electricité de France DIPNN DT, 19 Rue Pierre Bourdeix, 69007 Lyon, France;2. Ecole Normale Supérieure de Paris Saclay, Laboratoire SATIE UMR CNRS 8029, 4, Avenue des Sciences, 91190 Gif-sur-Yvette, France;3. EDF R&D, 6 Quai Watier, 78401 Chatou Cedex, France;1. Kocaeli University, Department of Civil Engineering, Umuttepe Campus, Kocaeli 41380, Turkey;2. Columbia University, Department of Civil Engineering and Engineering Mechanics, New York 10027, USA;3. University of Applied Sciences Regensburg, Faculty of Civil Engineering, Regensburg 93053, Germany |
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| Abstract: | This work consists in studying the effect of the water saturation of aggregates on the development of shrinkage and the potential cracking risk of early age ordinary concrete. Different concretes were obtained from a given concrete mixture by changing only the initial degree of saturation of limestone aggregates. 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 water saturation of aggregates. A relative cracking risk was estimated from a stress-based approach and experimentally assessed parameters. The potential risk of cracking of these different concretes was shown to be different. Even if the total water content is kept constant, the water remaining in the cement paste actually depends on the initial water saturation of aggregates. The early age behaviour of concrete and the development of its early age properties depend on the amount of added water during the mixing. |
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| Keywords: | Aggregates Water saturation Concrete Shrinkage Cracking risk |
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