Influence of volume fraction and characteristics of lightweight aggregates on the mechanical properties of concrete |
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| Authors: | Y. Ke A.L. Beaucour S. Ortola H. Dumontet R. Cabrillac |
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| Affiliation: | 1. Laboratoire de Mécanique et Matériaux du Génie Civil, Université de Cergy-Pontoise, 5, mail Gay Lussac, Neuville sur Oise, 95031 Cergy-Pontoise cedex, France;2. Institut Jean Le Rond d’Alembert, Université de Pierre et Marie Curie – CNRS, 4, Place Jussieu Tour 55-65 5ème étage Case 161-162, 75252 Paris cedex 05, France |
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| Abstract: | The influence of lightweight expanded clay and shale aggregates on the mechanical performances of concrete is studied through their volume fractions and aggregate qualities. A very thorough characterisation of a series of LWAs is completed. The impact of aggregates is not only related to its particle density but also to the shell thickness, the percentage of large pores and broken grains. A reverse determination of the elastic modulus of LWA is carried out based to the experimental data. The comparison with values measured ultrasonically confirms the part played by the aggregate stiffer shell in mechanical properties of LWA. |
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