Investigations on three-dimensional pore-structure in cementitious materials using metal centrifugation porosimetry and simulation

被引：6
作者：
Qian, Rusheng [1 ,2 ]
Liu, Guojian [3 ]
Liu, Zhiyong [1 ]
She, Wei [1 ]
Qiao, Hongxia [4 ]
Zhang, Yunsheng [1 ,4 ]
机构：
[1] Southeast Univ, Jiangsu Key Lab Construct Mat, Nanjing 211189, Peoples R China
[2] Univ Lille, Lab Mecan Multiphys & Multiechel, LaMcube, Cent Lille,FRE 2016,CNRS, F-59000 Lille, France
[3] Suzhou Univ Sci & Technol, Sch Civil Engn, Suzhou 215011, Peoples R China
[4] Lanzhou Univ Technol, Coll Civil Engn, Lanzhou 730050, Gansu, Peoples R China
来源：
MATERIALS LETTERS | 2021年 / 282卷
关键词：
3D pore-structure; X-ray techniques; Metal; Simulation; Porous materials; Cement; FLY-ASH; CONCRETE; PASTE;
D O I：
10.1016/j.matlet.2020.128684
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Cementitious material is a vital composite for infrastructure, its 3D pore-structure determines its cement hydration as well as structural performance. However, the quantitative characterization of 3D pore-structure has yet been investigated in depth. In this study, the 3D pore-structure in hardened cement-paste is investigated systematically using innovative experiment and simulation methods. The experiment implements nano X-ray techniques combined with metal centrifugation porosimetry (X-MCP) for visualizing the 3D pore-structure and compared to that obtained by CEM3D-based model. The 3D pore-structure parameters containing the critical pore-diameter (d(c)) and porosity by X-MCP and CEM3D are counted and compared to those by mercury intrusion porosimetry (MIP). The results show that the d(c) values by X-MCP and CEM3D are both higher than those by MIP, and the porosity values obtained by the three methods agree with each other. (C) 2020 Elsevier B.V. All rights reserved.
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页数：4
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