期刊
MATERIALS CHARACTERIZATION
卷 151, 期 -, 页码 203-215出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.matchar.2019.02.014
关键词
MIP; Surface conformance; X-CT; Entrapment; Characterization
类别
资金
- National Natural Science Foundation of China [51878602, 51578194]
Mercury entrapment in a porous material after mercury intrusion porosimetry (MIP) test is widely reported, yet the characterization of the entrapped mercury remains unclear. This study reported an experimental investigation on the entrapped mercury in a porous cement paste with/without surface-conformance control determined by X-ray computed tomography (X-CT). MIP tests were performed under three different maximum intrusion pressures. Results show that the surface-conformance control can substantially depress the first rise of throat size distributions and lower the threshold throat sizes. The entrapped mercury drops can be easily traced by X-CT due to the high mass attenuation coefficient of mercury. Both the entrapped and released mercury drops only occupy the limited volume fraction of the intruded pores. The surface conformance can decrease the mercury volume released from the pores. The findings of this study provide insights in better pore structure characterization of porous cement-based materials.
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