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. As a result, the combined use of microstructural and micromechanical characterization tools at multiple scales provides valuable information towards the material design of fly ash geopolymers.
- Authors:
-
- Arizona State Univ., Tempe, AZ (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1247144
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Cement and Concrete Research
- Additional Journal Information:
- Journal Volume: 78; Journal Issue: PB; Journal ID: ISSN 0008-8846
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; backscattered electron imaging; fly ash; alkali activated cement; micromechanics; X-ray tomography
Citation Formats
Das, Sumanta, Yang, Pu, Singh, Sudhanshu S., Mertens, James C. E., Xiao, Xianghui, Chawla, Nikhilesh, and Neithalath, Narayanan. Effective properties of a fly ash geopolymer: Synergistic application of X-ray synchrotron tomography, nanoindentation, and homogenization models. United States: N. p., 2015.
Web. doi:10.1016/j.cemconres.2015.08.004.
Das, Sumanta, Yang, Pu, Singh, Sudhanshu S., Mertens, James C. E., Xiao, Xianghui, Chawla, Nikhilesh, & Neithalath, Narayanan. Effective properties of a fly ash geopolymer: Synergistic application of X-ray synchrotron tomography, nanoindentation, and homogenization models. United States. https://doi.org/10.1016/j.cemconres.2015.08.004
Das, Sumanta, Yang, Pu, Singh, Sudhanshu S., Mertens, James C. E., Xiao, Xianghui, Chawla, Nikhilesh, and Neithalath, Narayanan. Wed .
"Effective properties of a fly ash geopolymer: Synergistic application of X-ray synchrotron tomography, nanoindentation, and homogenization models". United States. https://doi.org/10.1016/j.cemconres.2015.08.004. https://www.osti.gov/servlets/purl/1247144.
@article{osti_1247144,
title = {Effective properties of a fly ash geopolymer: Synergistic application of X-ray synchrotron tomography, nanoindentation, and homogenization models},
author = {Das, Sumanta and Yang, Pu and Singh, Sudhanshu S. and Mertens, James C. E. and Xiao, Xianghui and Chawla, Nikhilesh and Neithalath, Narayanan},
abstractNote = {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. As a result, the combined use of microstructural and micromechanical characterization tools at multiple scales provides valuable information towards the material design of fly ash geopolymers.},
doi = {10.1016/j.cemconres.2015.08.004},
journal = {Cement and Concrete Research},
number = PB,
volume = 78,
place = {United States},
year = {Wed Sep 02 00:00:00 EDT 2015},
month = {Wed Sep 02 00:00:00 EDT 2015}
}
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