Alternative parameter to characterize pore distribution in cement paste, and its relation to mechanical properties

T. S. Han, J. S. Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Porosity has been used widely as an index for the void volume fraction within the microstructure of cement paste. However, the porosity has its limitations as a scalar parameter so that alternative measures could help further identifying the characteristics of pore microstructure and better correlating microstructure with properties. The lineal-path function has been shown its potential to describe the characteristics of complex microstructures. In this study, the centroid of the lineal-path function is investigated as a supplement or alternative parameter to porosity for characterizing pore microstructure and correlating the characteristics with mechanical properties. In particular, the parameter is used to determine the diffusive crack length parameter, one of the material modeling parameters of the crack phase field model. The centroid of the lineal-path function identifies the bimodal distribution of the pore microstructures within cement paste, which cannot be captured with porosity. The evaluated mechanical properties such as stiffness and tensile strength using the crack phase field model whose parameter is determined from the centroid of the lineal-path function are in the range of expected values. It is shown that the centroid of the lineal-path function has a potential as an alternative or supplement parameter for microstructure characterization and for determining the modeling parameter of the crack phase field model.

Original languageEnglish
Title of host publicationComputational Modelling of Concrete Structures - Proceedings of the conference on Computational Modelling of Concrete and Concrete Structures, EURO-C 2018
EditorsBernhard Pichler, Jan G. Rots, Günther Meschke
PublisherCRC Press/Balkema
Pages311-316
Number of pages6
ISBN (Print)9781138741171
DOIs
Publication statusPublished - 2018
EventConference on Computational Modelling of Concrete and Concrete Structures, EURO-C 2018 - Bad Hofgastein, Austria
Duration: 2018 Feb 262018 Mar 1

Publication series

NameComputational Modelling of Concrete Structures - Proceedings of the conference on Computational Modelling of Concrete and Concrete Structures, EURO-C 2018

Conference

ConferenceConference on Computational Modelling of Concrete and Concrete Structures, EURO-C 2018
Country/TerritoryAustria
CityBad Hofgastein
Period18/2/2618/3/1

Bibliographical note

Funding Information:
This research was supported by a grant from the Korea Research Foundation, funded by the Korean Government (NRF-2015K1A3A1A59073929 and NRF-2016R1D1A1B03931635). Parallel computation in this work was supported by the PLSI supercomputing resources of the Korea Institute of Science and Technology Information and the resources of the UNIST Supercomputing Center. The μ-CT images were obtained from the synchrotron operated by the Pohang Accelerator Laboratory (PAL) in Korea. Authors gratefully acknowledge Mr. Xiaoxuan Zhang and Prof. Chri-tian Linder at Stanford University for sharing their knowledge and implementation of the crack phase field model.

Publisher Copyright:
© 2018 Taylor & Francis Group, London.

All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Civil and Structural Engineering

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