Journal of Shanghai Jiao Tong University ›› 2022, Vol. 56 ›› Issue (9): 1199-1207.doi: 10.16183/j.cnki.jsjtu.2021.089

• Naval Architecture, Ocean and Civil Engineering • Previous Articles     Next Articles

Multiscale Calculation of Elastic Modulus of Cement Paste Based on Grid Nanoindentation Technology

CHEN Xiaowen1, HAN Yudong2, DING Xiaoping2, HOU Dongwei1()   

  1. 1. School of Naval Architecture, Ocean and Civil Engineering;Shanghai Key Laboratory for Digital Maintenance of Buildings and Infrastructure, Shanghai Jiao Tong University, Shanghai 200240, China
    2. Central Research Institute of Building and Construction, MCC Group Co., Ltd., Beijing 100088, China
  • Received:2021-03-19 Online:2022-09-28 Published:2022-10-09
  • Contact: HOU Dongwei


The calculation of multiscale elastic parameters of cementitious materials based on micromechanical tests and the composite material theory is one of the key theoretical bases for precise design of cementitious materials performance. In this paper, grid nanoindentation tests of microscopic elastic modulus and the mercury intrusion test were conducted on hardened cement paste specimens at different water-cement ratios, to establish a multiscale homogenization calculation method for the elastic modulus of cement paste considering the influence of pores. Besides, the applicability of the dilute method, the self-consistent method, the Mori-Tanaka method, the interaction direct derivation (IDD) method, and the multilevel homogenization method was compared. The results show that the multi-phase and multi-scale calculations considering the effect of pores is in good agreement with experimental values. Except the multi-level homogenization method, the calculation results of several commonly used composite homogenization methods are similar.

Key words: grid nanoindentation, homogenization method, elastic modulus, multiscale

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