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author:

Zhang, Yong (Zhang, Yong.) [1] | Wu, Kai (Wu, Kai.) [2] | Yang, Zhengxian (Yang, Zhengxian.) [3] | Ye, Guang (Ye, Guang.) [4]

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EI

Abstract:

Reliable characterization of the pore structure is essentially important for transport-related durability studies of cementitious materials. Mercury intrusion porosimetry has been commonly used for pore structure measurement while the ink-bottle effect significantly affects the trustworthiness of pore size features of cementitious materials. Pressurization-depressurization cycling mercury intrusion porosimetry (PDC-MIP) is an alternative approach previously reported with the purpose to provide better estimates of pore size results. It is found however that the PDC-MIP greatly overestimates the ink-bottle pore volume owing to the incomplete extrusion of mercury in throat pores after the pressurization-depressurization cycle. Intrusion-extrusion cyclic mercury porosimetry (IEC-MIP), as a further improvement, is then described, which can reliably capture the ink-bottle effect and obtain a clear picture of the distribution of the ink-bottle pores in cementitious materials. The ink-bottle effect of cement pastes is observed being pore size-dependent and the role of critical pores is emphasized. Water-cement ratio primarily changes the effective porosity while plays a minor role in the ink-bottle porosity. The addition of reactive blends substantially enhances the ink-bottle effect during mercury penetration into small pores. IEC-MIP tests, together with a unique data analysis, enable to obtain a more truthful pore size distribution. © 2022 Elsevier Ltd

Keyword:

Bottles Cements Extrusion Mercury (metal) Pelletizing Pore size Pore structure Pressurization Size distribution

Community:

  • [ 1 ] [Zhang, Yong]College of Civil Engineering, Fuzhou University, Fuzhou; 350116, China
  • [ 2 ] [Zhang, Yong]Microlab, Section of Materials and Environment, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft; 2628 CN, Netherlands
  • [ 3 ] [Wu, Kai]Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, School of Materials Science and Engineering, Tongji University, Shanghai; 201804, China
  • [ 4 ] [Yang, Zhengxian]College of Civil Engineering, Fuzhou University, Fuzhou; 350116, China
  • [ 5 ] [Ye, Guang]Microlab, Section of Materials and Environment, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft; 2628 CN, Netherlands

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Source :

Cement and Concrete Research

ISSN: 0008-8846

Year: 2022

Volume: 161

1 1 . 4

JCR@2022

1 0 . 9 0 0

JCR@2023

ESI HC Threshold:91

JCR Journal Grade:1

CAS Journal Grade:1

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 28

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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