Effective properties of a fly ash geopolymer: Synergistic application of X-ray synchrotron tomography, nanoindentation, and homogenization models

Sumanta Das; Pu Yang; Sudhanshu S. Singh; James C E Mertens; Xianghui Xiao; Nikhilesh Chawla; Narayanan Neithalath

doi:10.1016/j.cemconres.2015.08.004

Effective properties of a fly ash geopolymer: Synergistic application of X-ray synchrotron tomography, nanoindentation, and homogenization models

Sumanta Das, Pu Yang, Sudhanshu S. Singh, James C E Mertens, Xianghui Xiao, Nikhilesh Chawla, Narayanan Neithalath

Research output: Contribution to journal › Article › peer-review

88 Scopus citations

Abstract

Microstructural and micromechanical investigation of a fly ash-based geopolymer using: (i) synchrotron X-ray tomography (XRT) to determine the volume fraction and tortuosity of pores that are influential in fluid transport, (ii) mercury intrusion porosimetry (MIP) to capture the volume fraction of smaller pores, (iii) scanning electron microscopy (SEM) combined with multi-label thresholding to identify and characterize the solid phases in the microstructure, and (iv) nanoindentation to determine the component phase elastic properties using statistical deconvolution, is reported in this paper. The phase volume fractions and elastic properties are used in multi-step mean field homogenization (Mori-Tanaka and double inclusion) models to determine the homogenized macroscale elastic modulus of the composite. The homogenized elastic moduli are in good agreement with the flexural elastic modulus determined on macroscale paste beams. The combined use of microstructural and micromechanical characterization tools at multiple scales provides valuable information towards the material design of fly ash geopolymers.

Original language	English (US)
Pages (from-to)	252-262
Number of pages	11
Journal	Cement and Concrete Research
Volume	78
DOIs	https://doi.org/10.1016/j.cemconres.2015.08.004
State	Published - Dec 1 2015

Keywords

Alkali activated cement (D)
Backscattered electron imaging (B)
Fly ash (D)
Micromechanics (C)
X-ray tomography

ASJC Scopus subject areas

Building and Construction
Materials Science(all)

Access to Document

10.1016/j.cemconres.2015.08.004

Cite this

@article{8cc0ee2c76d94abf8aaadb7894c5aa0a,

title = "Effective properties of a fly ash geopolymer: Synergistic application of X-ray synchrotron tomography, nanoindentation, and homogenization models",

abstract = "Microstructural and micromechanical investigation of a fly ash-based geopolymer using: (i) synchrotron X-ray tomography (XRT) to determine the volume fraction and tortuosity of pores that are influential in fluid transport, (ii) mercury intrusion porosimetry (MIP) to capture the volume fraction of smaller pores, (iii) scanning electron microscopy (SEM) combined with multi-label thresholding to identify and characterize the solid phases in the microstructure, and (iv) nanoindentation to determine the component phase elastic properties using statistical deconvolution, is reported in this paper. The phase volume fractions and elastic properties are used in multi-step mean field homogenization (Mori-Tanaka and double inclusion) models to determine the homogenized macroscale elastic modulus of the composite. The homogenized elastic moduli are in good agreement with the flexural elastic modulus determined on macroscale paste beams. The combined use of microstructural and micromechanical characterization tools at multiple scales provides valuable information towards the material design of fly ash geopolymers.",

keywords = "Alkali activated cement (D), Backscattered electron imaging (B), Fly ash (D), Micromechanics (C), X-ray tomography",

author = "Sumanta Das and Pu Yang and Singh, {Sudhanshu S.} and Mertens, {James C E} and Xianghui Xiao and Nikhilesh Chawla and Narayanan Neithalath",

note = "Funding Information: The authors gratefully acknowledge the National Science Foundation (NSF) for the partial support for this research ( CMMI: 1068985 and CMMI: 1353170 ). This research was conducted in the Laboratory for the Science of Sustainable Infrastructural Materials, the Structural Engineering Laboratory, the Mechanical Behavior of Materials Facility, and 4D Materials Science Laboratory at Arizona State University and the supports that have made these laboratories possible are acknowledged. The 2-BM beamline of the Advanced Photon Source (APS) at Argonne National Laboratory is also acknowledged. The contents of this paper reflect the views of the authors who are responsible for the facts and accuracy of the data presented herein, and do not necessarily reflect the views and policies of the funding agency, nor do the contents constitute a standard, specification, or a regulation. Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd.",

year = "2015",

month = dec,

day = "1",

doi = "10.1016/j.cemconres.2015.08.004",

language = "English (US)",

volume = "78",

pages = "252--262",

journal = "Cement and Concrete Research",

issn = "0008-8846",

publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Effective properties of a fly ash geopolymer

T2 - Synergistic application of X-ray synchrotron tomography, nanoindentation, and homogenization models

AU - Das, Sumanta

AU - Yang, Pu

AU - Singh, Sudhanshu S.

AU - Mertens, James C E

AU - Xiao, Xianghui

AU - Chawla, Nikhilesh

AU - Neithalath, Narayanan

N1 - Funding Information: The authors gratefully acknowledge the National Science Foundation (NSF) for the partial support for this research ( CMMI: 1068985 and CMMI: 1353170 ). This research was conducted in the Laboratory for the Science of Sustainable Infrastructural Materials, the Structural Engineering Laboratory, the Mechanical Behavior of Materials Facility, and 4D Materials Science Laboratory at Arizona State University and the supports that have made these laboratories possible are acknowledged. The 2-BM beamline of the Advanced Photon Source (APS) at Argonne National Laboratory is also acknowledged. The contents of this paper reflect the views of the authors who are responsible for the facts and accuracy of the data presented herein, and do not necessarily reflect the views and policies of the funding agency, nor do the contents constitute a standard, specification, or a regulation. Publisher Copyright: © 2015 Elsevier Ltd.

PY - 2015/12/1

Y1 - 2015/12/1

N2 - Microstructural and micromechanical investigation of a fly ash-based geopolymer using: (i) synchrotron X-ray tomography (XRT) to determine the volume fraction and tortuosity of pores that are influential in fluid transport, (ii) mercury intrusion porosimetry (MIP) to capture the volume fraction of smaller pores, (iii) scanning electron microscopy (SEM) combined with multi-label thresholding to identify and characterize the solid phases in the microstructure, and (iv) nanoindentation to determine the component phase elastic properties using statistical deconvolution, is reported in this paper. The phase volume fractions and elastic properties are used in multi-step mean field homogenization (Mori-Tanaka and double inclusion) models to determine the homogenized macroscale elastic modulus of the composite. The homogenized elastic moduli are in good agreement with the flexural elastic modulus determined on macroscale paste beams. The combined use of microstructural and micromechanical characterization tools at multiple scales provides valuable information towards the material design of fly ash geopolymers.

AB - Microstructural and micromechanical investigation of a fly ash-based geopolymer using: (i) synchrotron X-ray tomography (XRT) to determine the volume fraction and tortuosity of pores that are influential in fluid transport, (ii) mercury intrusion porosimetry (MIP) to capture the volume fraction of smaller pores, (iii) scanning electron microscopy (SEM) combined with multi-label thresholding to identify and characterize the solid phases in the microstructure, and (iv) nanoindentation to determine the component phase elastic properties using statistical deconvolution, is reported in this paper. The phase volume fractions and elastic properties are used in multi-step mean field homogenization (Mori-Tanaka and double inclusion) models to determine the homogenized macroscale elastic modulus of the composite. The homogenized elastic moduli are in good agreement with the flexural elastic modulus determined on macroscale paste beams. The combined use of microstructural and micromechanical characterization tools at multiple scales provides valuable information towards the material design of fly ash geopolymers.

KW - Alkali activated cement (D)

KW - Backscattered electron imaging (B)

KW - Fly ash (D)

KW - Micromechanics (C)

KW - X-ray tomography

UR - http://www.scopus.com/inward/record.url?scp=84943197313&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84943197313&partnerID=8YFLogxK

U2 - 10.1016/j.cemconres.2015.08.004

DO - 10.1016/j.cemconres.2015.08.004

M3 - Article

AN - SCOPUS:84943197313

SN - 0008-8846

VL - 78

SP - 252

EP - 262

JO - Cement and Concrete Research

JF - Cement and Concrete Research

ER -

Effective properties of a fly ash geopolymer: Synergistic application of X-ray synchrotron tomography, nanoindentation, and homogenization models

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this