• 船舶海洋与建筑工程 •

### 水泥净浆弹性模量的纳米压痕表征与多尺度计算

1. 1.上海交通大学 船舶海洋与建筑工程学院;上海市公共建筑和基础设施数字化运维重点实验室,上海 200240
2.中冶建筑研究总院有限公司,北京 100088
• 收稿日期:2021-03-19 出版日期:2022-09-28 发布日期:2022-10-09
• 通讯作者: 侯东伟 E-mail:houdw@sjtu.edu.cn
• 作者简介:陈小文(1996-),男,福建省福州市人,硕士生,从事水泥基材料纳米压痕表征研究.
• 基金资助:
国家自然科学基金(51308334);国家自然科学基金(51479113);国家重点研发计划(2016YFC0701003);国防科技创新特区项目13-07主题

### 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 E-mail:houdw@sjtu.edu.cn

Abstract:

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.