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Title: Identification of microstructural characteristics in lightweight aggregate concretes by micromechanical modelling including the interfacial transition zone (ITZ)

Abstract

An approach which combines both experimental techniques and micromechanical modelling is developed in order to characterise the elastic behaviour of lightweight aggregate concretes (LWAC). More than three hundred LWAC specimens with various lightweight aggregate types (5) of several volume ratios and three different mortar matrices (normal, HP, VHP) are tested. The modelling is based on iterative homogenisation process and includes the ITZ specificities experimentally observed with scanning electron microscopy (SEM). In agreement with experimental measurements, the effects of mix design parameters as well as of the interfacial transition zone (ITZ) on concrete mechanical performances are quantitatively analysed. Confrontations with experimental results allow identifying the elastic moduli of LWA which are difficult to determine experimentally. Whereas the traditional empirical formulas are not sufficiently precise, predictions of LWAC elastic behaviours computed with the micromechanical models appear in good agreement with experimental measurements.

Authors:
 [1];  [1];  [1];  [2]
  1. University of Cergy-Pontoise, Laboratoire de Mecanique and Materiaux du Genie Civil, EA 4114, F-95000 Cergy-Pontoise (France)
  2. UPMC Univ Paris 06, UMR 7190, Institut Jean le Rond d'Alembert, F-75005, Paris (France)
Publication Date:
OSTI Identifier:
21418097
Resource Type:
Journal Article
Journal Name:
Cement and Concrete Research
Additional Journal Information:
Journal Volume: 40; Journal Issue: 11; Other Information: DOI: 10.1016/j.cemconres.2010.07.001; PII: S0008-8846(10)00161-4; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Journal ID: ISSN 0008-8846
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CONCRETES; ITERATIVE METHODS; MICROSTRUCTURE; MORTARS; PERFORMANCE; SCANNING ELECTRON MICROSCOPY; SIMULATION; SPECIFICITY; BUILDING MATERIALS; CALCULATION METHODS; ELECTRON MICROSCOPY; MATERIALS; MICROSCOPY

Citation Formats

Ke, Y, Ortola, S, Beaucour, A L, Dumontet, H, and CNRS, UMR 7190, Institut Jean le Rond d'Alembert, F-75005, Paris. Identification of microstructural characteristics in lightweight aggregate concretes by micromechanical modelling including the interfacial transition zone (ITZ). United States: N. p., 2010. Web. doi:10.1016/j.cemconres.2010.07.001.
Ke, Y, Ortola, S, Beaucour, A L, Dumontet, H, & CNRS, UMR 7190, Institut Jean le Rond d'Alembert, F-75005, Paris. Identification of microstructural characteristics in lightweight aggregate concretes by micromechanical modelling including the interfacial transition zone (ITZ). United States. https://doi.org/10.1016/j.cemconres.2010.07.001
Ke, Y, Ortola, S, Beaucour, A L, Dumontet, H, and CNRS, UMR 7190, Institut Jean le Rond d'Alembert, F-75005, Paris. 2010. "Identification of microstructural characteristics in lightweight aggregate concretes by micromechanical modelling including the interfacial transition zone (ITZ)". United States. https://doi.org/10.1016/j.cemconres.2010.07.001.
@article{osti_21418097,
title = {Identification of microstructural characteristics in lightweight aggregate concretes by micromechanical modelling including the interfacial transition zone (ITZ)},
author = {Ke, Y and Ortola, S and Beaucour, A L and Dumontet, H and CNRS, UMR 7190, Institut Jean le Rond d'Alembert, F-75005, Paris},
abstractNote = {An approach which combines both experimental techniques and micromechanical modelling is developed in order to characterise the elastic behaviour of lightweight aggregate concretes (LWAC). More than three hundred LWAC specimens with various lightweight aggregate types (5) of several volume ratios and three different mortar matrices (normal, HP, VHP) are tested. The modelling is based on iterative homogenisation process and includes the ITZ specificities experimentally observed with scanning electron microscopy (SEM). In agreement with experimental measurements, the effects of mix design parameters as well as of the interfacial transition zone (ITZ) on concrete mechanical performances are quantitatively analysed. Confrontations with experimental results allow identifying the elastic moduli of LWA which are difficult to determine experimentally. Whereas the traditional empirical formulas are not sufficiently precise, predictions of LWAC elastic behaviours computed with the micromechanical models appear in good agreement with experimental measurements.},
doi = {10.1016/j.cemconres.2010.07.001},
url = {https://www.osti.gov/biblio/21418097}, journal = {Cement and Concrete Research},
issn = {0008-8846},
number = 11,
volume = 40,
place = {United States},
year = {Mon Nov 15 00:00:00 EST 2010},
month = {Mon Nov 15 00:00:00 EST 2010}
}