Alternative estimation of effective Youngs Modulus for Lightweight Aggregate Concrete LWAC

Abstract

The prediction of effective mechanical properties of composite materials using analytical models is of significant practical interest in situations in which tests are impossible, difficult, or costly. Many experimental and numerical works are attempting to predict the elastic properties of Lightweight Aggregate Concrete (LWAC). In order to choose the optimized prediction composite model, the purpose of this paper is to appraise the effective Youngs modulus of LWAC using two-phase composite models. To this effect, results of previous experimental research have used as a platform, upon which, 07 two-phase composite models were applied. The outcomes of this comparative analysis show that not all two-phase analytical models can be directly used for predicting Youngs modulus of LWAC. The Maxwell, Counto1 and Hashin-Hansen models are in close concordance with the experimental Youngs modulus of all LWAC used for comparison in this study (119 values). They were found more appropriate for reasonable prediction of elasticity modules of the LWAC.

Keywords

• analytic model
• concrete
• youngs modulus
• lightweight aggregate
• two-phase