Abstract
This paper aims to present the experimental results involving the use of nanoindentation measurements and prediction of macroscale elastic properties of high performance cementitious composites (HPCC). The elastic properties of HPCC mixture were evaluated at different length scales by nanoindentation (microscale), and elastic moduli and compressive strength tests (macroscale). The nanoindentation results, obtained 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 show that the presented method allows a reliable advanced prediction of HPCC elastic properties indicating, thus, that inserting nanotechnology in the concrete industry can be promising, since it would allow the production of a more predictable composite in an easier and less expensive way.
Highlights
Cementitious composites include various types of concretes and mortars and represent the most used building materials
This paper aims to present the experimental results involving the use of nanoindentation measurements and prediction of macroscale elastic properties of high performance cementitious composites (HPCC)
Nanoindentation measurements have been applied for determination of macroscale elastic properties of HPCC based on multiscale analysis
Summary
Cementitious composites include various types of concretes and mortars and represent the most used building materials. Concrete and mortar mixtures are considered by many researches and practitioners as a homogeneous material. This classification may change according to the level of observation (micro, meso and macroscopic level). Those materials whose homogeneity depends on the observation level are called multiscale materials. Based on this definition, cementitious composites are considered as typical representatives of multiscale materials since they can be treated as homogeneous in the macroscopic level (cm~m length scale), and as heterogeneous material in a finer level of observation (nm~cm length scale). The multiscale analysis of a composite involves the following steps: 1 microstructure observation (i.e. determination of morphological parameters) and separation of chemically different phases; 2 assessment of mechanical properties of individual phases and their links to chemical properties; 3 upscaling of properties from the microlevel to a broader scale,
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