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3D Monte Carlo simulation of backscattered electron signal variation across pore-solid boundaries in cement-based materials
File | Description | Size | Format | |
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3D Monte Carlo - Accepted.pdf | Accepted version | 1.24 MB | Adobe PDF | View/Open |
Title: | 3D Monte Carlo simulation of backscattered electron signal variation across pore-solid boundaries in cement-based materials |
Authors: | Yio, MHN Wong, HS Buenfeld, NR |
Item Type: | Journal Article |
Abstract: | Three-dimensional (3D) Monte Carlo simulation was used to study the variation of backscattered electron (BSE) signal across pore-solid boundaries in cement-based materials in order to enhance quantitative analysis of pore structure. The effects of pore size, depth and boundary inclination angle were investigated. It is found that pores down to 1 nm can generate sufficient contrast to be detected. Visibility improves with larger pore size, smaller beam probe size and lower acceleration voltage. However, pixels in shallow pores or near pore boundaries display higher grey values (brightness) than expected due to sampling sub-surface or neighbouring solid material. Thus, cement-based materials may appear less porous or the pores appear smaller than they actually are in BSE images. Simulated BSE images were used to test the accuracy of the Overflow pore segmentation method. Results show the method is generally valid and gives low errors for pores that are 1 μm and greater. |
Issue Date: | 16-Sep-2016 |
Date of Acceptance: | 9-Sep-2016 |
URI: | http://hdl.handle.net/10044/1/40005 |
DOI: | https://dx.doi.org/10.1016/j.cemconres.2016.09.008 |
ISSN: | 0008-8846 |
Publisher: | Elsevier |
Start Page: | 320 |
End Page: | 331 |
Journal / Book Title: | Cement and Concrete Research |
Volume: | 89 |
Copyright Statement: | © 2016, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ |
Sponsor/Funder: | Engineering & Physical Science Research Council (EPSRC) |
Funder's Grant Number: | EP/K030760/1 |
Keywords: | Building & Construction 0905 Civil Engineering 1202 Building |
Publication Status: | Published |
Appears in Collections: | Civil and Environmental Engineering Faculty of Engineering |