Issue 52

M.F. Bouali et alii, Frattura ed Integrità Strutturale, 52 (2020) 82-97; DOI: 10.3221/IGF-ESIS.52.07 82 Alternative estimation of effective Young’s Modulus for Lightweight Aggregate Concrete LWAC Meriem Fakhreddine Bouali Department of Civil Engineering, Faculty of Sciences & Technology, University of Mohamad Cherif Messaadia, Souk Ahras, 41000, Algeria m.bouali@univ-soukahras.dz b.meriemfakhreddine@gmail.com , http://orcid.org/0000-0002-6986-980X Abdelkader Hima Department of Electrical Engineering, Faculty of Technology, University of El-Oued, 39000, Algeria Abdelkader-hima@univ-eloued.dz, http://orcid.org/0000-0002-5533-3991 A BSTRACT . 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 Young’s 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 Young’s modulus of LWAC. The Maxwell, Counto1 and Hashin-Hansen models are in close concordance with the experimental Young’s 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. K EYWORDS . Analytic model; Concrete; Young’s modulus; Lightweight aggregate; Two-phase. Citation: Bouali, M. F., Hima, A. Alternative estimation of effective Young’s Modulus for Lightweight Aggregate Concrete LWAC, Frattura ed Integrità Strutturale, 52 (2020) 82- 97. Received: 15.11.2019 Accepted: 08.01.2020 Published: 01.04.2020 Copyright: © 2020 This is an open access article under the terms of the CC-BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. I NTRODUCTION ecently, special attention has been paid to the development of Lightweight Aggregate Concrete (LWAC)  1, 2, 3  which offers many advantages as a building material, including low weight, easier construction and better resistance compared with ordinary concrete. Lightweight Aggregate Concrete (LWAC) primarily improves the thermal and sound insulation properties of buildings next to its basic applications  4  . The lightweight concrete are created by substituting the natural aggregates with the lightweight aggregates (LWA), which are classified into two fundamental R