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Methodology for nanoindentation-assisted prediction of macroscale elastic properties of high performance cementitious composites
Highlights Two-step homogenization for predicting elastic properties of a HPCC. Application of the methodology to highly heterogeneous cementitious material. Reducing experimental demands by using strictly local nanoindentation measurements. Comparison of analytical and numerical homogenization schemes. Verification of model prediction by static and dynamic moduli mea-surements.
Abstract This paper describes a methodology applied for determination of macroscale elastic properties of high performance cementitious composites (HPCC) based on nanoindentation measurements. For that, the elastic properties of HPCC mixtures with quartz filler and fly ash were evaluated at different length scales by nanoindentation (microscale) and the static and dynamic elastic moduli and compressive strength tests (macroscale). The nanoindentation results, obtained from a representative microlevel area by grid indentation with subsequent phase deconvolution, were complemented by an independent porosimetry test and inserted into a two-step analytical homogenization scheme to predict the overall macroscale properties. The final results indicate that the presented methodology allows a reliable advanced prediction of HPCC elastic properties, which is promising for the concrete industry since it would allow for reducing the number of large scale experiments and producing of a more predictable composite in an easier and experimentally less expensive way.
Methodology for nanoindentation-assisted prediction of macroscale elastic properties of high performance cementitious composites
Highlights Two-step homogenization for predicting elastic properties of a HPCC. Application of the methodology to highly heterogeneous cementitious material. Reducing experimental demands by using strictly local nanoindentation measurements. Comparison of analytical and numerical homogenization schemes. Verification of model prediction by static and dynamic moduli mea-surements.
Abstract This paper describes a methodology applied for determination of macroscale elastic properties of high performance cementitious composites (HPCC) based on nanoindentation measurements. For that, the elastic properties of HPCC mixtures with quartz filler and fly ash were evaluated at different length scales by nanoindentation (microscale) and the static and dynamic elastic moduli and compressive strength tests (macroscale). The nanoindentation results, obtained from a representative microlevel area by grid indentation with subsequent phase deconvolution, were complemented by an independent porosimetry test and inserted into a two-step analytical homogenization scheme to predict the overall macroscale properties. The final results indicate that the presented methodology allows a reliable advanced prediction of HPCC elastic properties, which is promising for the concrete industry since it would allow for reducing the number of large scale experiments and producing of a more predictable composite in an easier and experimentally less expensive way.
Methodology for nanoindentation-assisted prediction of macroscale elastic properties of high performance cementitious composites
da Silva, W.R.L. (Autor:in) / Němeček, J. (Autor:in) / Štemberk, P. (Autor:in)
Cement and Concrete Composites ; 45 ; 57-68
16.09.2013
12 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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