NANOINDENTATION ON ULTRA HIGH PERFORMANCE CONCRETE SYSTEM

作者：Nemecek Jiri^*; Lehmann Christian; Fontana Patrick

来源：Chemicke Listy, 2011, 105: S656-S659.

• mechanical properties
• nanoindentation
• grid indentation
• heterogeneous system
• ultra high performance concrete

The paper describes results from nanoindentation on a very heterogeneous structural material, namely ultra high performace concrete (UHPC). Nanoindentation was used to investigate the influence of mixture components and production conditions on the mechanical response of the hydrated matrix after autoclaving. Statistical grid nanoindentation complemented with the deconvolution procedure revealed that the matrix properties of all tested mixtures are very similar without any significant difference in their stiffness or elasticity, respectively.
It is assumed that the sample zoning after autoclaving, which is exhibited in optical microscopy as different color of inner and outer parts, is caused by secondary effects like increased porosity.

• 出版日期2011