Nanoindentation testing requires well prepared samples with a good surface finish. Achieving a good surface finish is difficult for heterogeneous materials, particularly those with weak and fragile structures/phases, which are easily damaged or lost during preparation. The loss of weak structures can be drastically reduced by impregnating the sample with a resin before cutting and polishing. This technique is commonly used in SEM microscopy but has not been used for nanoindentation-testing before. This paper reports an investigation to extract micro-mechanical properties of different phases in resin impregnated sandstone and 1-day hydrated cement samples. The results appeared to show that it is feasible to use resin impregnated specimens for nanoindentation study of both materials.
Zhu, W., Fonteyn, M. T. J., Hughes, J., & Pearce, C. (2009). Nanoindentation Study of Resin Impregnated Sandstone and Early-Age Cement Paste Specimens. In NANOTECHNOLOGY IN CONSTRUCTION 3, PROCEEDINGS (pp. 403-408). Springer-Verlag. https://doi.org/10.1007/978-3-642-00980-8_55