This work proposes a new method for micromechanical simulation of cement paste based on a combination of statistical nanoindentation and XCT technique without the need for explicit identification of distinct phases. A linear relationship between the greyscale level and local Young’s modulus was assumed and verified by the two-sample Kolmogorov-Smirnov statistic. Based on this assumption, the fracture behaviour of a digital cubic volume (100 μm) under uniaxial tension was simulated using a lattice fracture model. The proposed method was compared with the results obtained from a approach used previously by the authors in which discrete phases were considered. The two methods show similar crack patterns and stressstrain responses. The proposed method is regarded more promising as it captures also the gradient of material properties within the discrete phases.
|Title of host publication||Proceedings of the Symposium on Concrete Modelling|
|Subtitle of host publication||CONMOD2018 27-30 August 2018 – Delft, Netherlands|
|Editors||Erik Schlangen, Geert de Schutter, Branko Šavija, Hongzhi Zhang, Claudia Romero Rodriguez|
|Publication status||Published - 2018|
|Event||Symposium on Concrete Modelling - Delft, Netherlands|
Duration: 27 Aug 2018 → 30 Aug 2018
|Conference||Symposium on Concrete Modelling|
|Period||27/08/18 → 30/08/18|
Zhang, H., Šavija, B., & Schlangen, E. (2018). Micromechanical modelling of cement paste using X-ray computed tomography and statistical nanoindentation. In E. Schlangen, G. de Schutter, B. Šavija, H. Zhang, & C. Romero Rodriguez (Eds.), Proceedings of the Symposium on Concrete Modelling: CONMOD2018 27-30 August 2018 – Delft, Netherlands (Vol. PRO 127, pp. 231-234). (Rilem proceedings; No. PRO 127). Rilem.