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Influence of volume fraction and characteristics of lightweight aggregates on the mechanical properties of concrete

✍ Scribed by Y. Ke; A.L. Beaucour; S. Ortola; H. Dumontet; R. Cabrillac

Publisher
Elsevier Science
Year
2009
Tongue
English
Weight
627 KB
Volume
23
Category
Article
ISSN
0950-0618

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✦ Synopsis

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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