Abstract
In this study, we treated the mechanical behavior of lightweight concrete with Tunisian clay aggregates, shaped and expanded in the laboratory. A method of manufacturing aggregate was followed. The choice of materials was packed and a physical, chemical, mineralogical and thermal (DTA / TGA) characterization of clay and aggregates was performed. For current cement content, we determined the compressive strength at 3, 28 and 90 days for a fixed water-cement ratio E/C. The Young's modulus was determined with empirical formulae. Thus, by SEM observations, we studied the aggregates and the interfacial transition zone (ITZ) between the cement paste and the aggregates at different ages. The obtained constitutes concrete is hence a structure concrete according to the AFNOR norms and the ACI Guide. (C) 2011 Published by Elsevier Ltd. Selection and peer-review under responsibility of ICM11