Automated analysis of the void structure in hardened concrete based on shape from focus-Reference-Cited by-同舟云学术

Automated analysis of the void structure in hardened concrete based on shape from focus

Published:2024-08-29 Issue:7 Volume:57 Page:
ISSN:1359-5997
Container-title:Materials and Structures
language:en
Short-container-title:Mater Struct

Author:

Li Gui,Hasholt Marianne Tange,Dahl Vedrana Andersen,Jensen Ole Mejlhede^ORCID

Abstract

AbstractThe quality of the air void system is essential for the frost resistance of concrete. Therefore, it is crucial to assess the quality of the air void system in hardened concrete in an appropriate way. In this study, the shape from focus (SFF) method is applied to identify the focused image of each point on the polished surface of hardened concrete and thereby acquire the depth information of the entire surface. The performance of various focus measure operators and window sizes is evaluated. Thereafter, the selected focus measure operator and window size are applied for the SFF analysis of all samples. Based on the obtained depth map, the voids are identified, and the void parameters of the hardened concrete are determined by an automated procedure. The main advantage of the SFF method is that it is possible to carry out an automated air void analysis without contrast enhancement.

Funder

Technical University of Denmark

Publisher

Springer Science and Business Media LLC

Link

https://link.springer.com/content/pdf/10.1617/s11527-024-02448-1.pdf

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