Nano-indentation experiment for determining mechanical properties of typical cement phases at nano/micro-scale

J. Fu (1, 2)

1 LGCGM - Laboratoire de Génie Civil et Génie Mécanique
2 Xi'an Shiyou University

Nano-indentation experiments are carried out on two cement pastes in order to get mechanical properties of cement pastes. For the comparison of initial cement paste, metakaolin as a valuable admixture for concrete/cement applications is added, considered to increase the reactivity of pozzolans. Statistical analysis on a number of indent points can be traced back to a medium modulus of elasticity. The averaged elastic moduli of typical phases in cement pastes are thus determined. Young's moduli of CH phases is about 44.7GPa by nano-indentation experiment, which are close to the previous simulation values and other references. Besides, Young's moduli of Calcite and clinker averaged by nano-indentation experiment are 86.695GPa and 102.230GPa, which are separately in relative good agreement with simulation values of 84.549GPa by Jia and 85.41-145.56GPa (porosity 10%) by Arar. A systematic approach is developed to validate and to assess the elastic parameters associated with each phase. The P-h curves of the simulation and experiment are compared to conclude on the feasibility of the methodology. © Published under licence by IOP Publishing Ltd.

Keywords: Calcite; Cements; Elastic moduli; Indentation; Nanoindentation; Cement paste; Cement phasis; Elastic parameters; Metakaolins; Mechanical properties

Domains: Engineering Sciences [physics]

J. Fu. Nano-indentation experiment for determining mechanical properties of typical cement phases at nano/micro-scale. 2018 International Conference on Advanced Electronic Materials, Computers and Materials Engineering, AEMCME 2018, Sep 2018, Changsha, China. pp.042019, ⟨10.1088/1757-899X/439/4/042019⟩. ⟨hal-02043508⟩