Imperial College London
Portrait Picture

Professor Nick Buenfeld

Faculty of Engineering, Department of Civil and Environmental Engineering

Professor of Concrete Structures
 
 
 
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Contact

 

n.buenfeld Website

 
 
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Location

 

228BSkempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Yio:2016:10.1016/j.cemconres.2016.09.008,
author = {Yio, MHN and Wong, HS and Buenfeld, NR},
doi = {10.1016/j.cemconres.2016.09.008},
journal = {Cement and Concrete Research},
pages = {320--331},
title = {3D Monte Carlo simulation of backscattered electron signal variation across pore-solid boundaries in cement-based materials},
url = {http://dx.doi.org/10.1016/j.cemconres.2016.09.008},
volume = {89},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - 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.
AU  - Yio,MHN
AU  - Wong,HS
AU  - Buenfeld,NR
DO  - 10.1016/j.cemconres.2016.09.008
EP  - 331
PY  - 2016///
SN  - 0008-8846
SP  - 320
TI  - 3D Monte Carlo simulation of backscattered electron signal variation across pore-solid boundaries in cement-based materials
T2  - Cement and Concrete Research
UR  - http://dx.doi.org/10.1016/j.cemconres.2016.09.008
UR  - http://hdl.handle.net/10044/1/40005
VL  - 89
ER  -
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