Characterization of microstructure-transport properties of deteriorated cement paste from computed tomography (CT) images

Pore structure, tortuosity and permeability are considered as key properties of porous materials such as cement pastes in understanding its durability. As such, image analysis techniques were used in this study to quantify pore size, effective porosity, tortuosity, and permeability from the microtom...

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Main Authors: Cortez, Shermaine M., Papel, Regina Anne DC., Tablada, Bernadette M.
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Language:English
Published: Animo Repository 2014
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Online Access:https://animorepository.dlsu.edu.ph/etd_bachelors/11282
https://animorepository.dlsu.edu.ph/cgi/viewcontent.cgi?article=11927&context=etd_bachelors
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Institution: De La Salle University
Language: English
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spelling oai:animorepository.dlsu.edu.ph:etd_bachelors-119272023-01-19T06:20:17Z Characterization of microstructure-transport properties of deteriorated cement paste from computed tomography (CT) images Cortez, Shermaine M. Papel, Regina Anne DC. Tablada, Bernadette M. Pore structure, tortuosity and permeability are considered as key properties of porous materials such as cement pastes in understanding its durability. As such, image analysis techniques were used in this study to quantify pore size, effective porosity, tortuosity, and permeability from the microtomographic images of deteriorated pastes that were subjected to accelerated leaching. At a spatial resolution of 0.5 μm/voxel, the effective porosity (Ï´e) was found to be in the ranges of 0.037 to 0.328. The characteristic pore size (d) using local thickness algorithm was found to be in the ranges of 1.406 to 3.589 microns. The geometric tortuosity (Ï„) based on random walk simulation in the percolating pore space was found to be in the ranges of 2.007 to 7.454. The permeability values (K) using NIST Permeability Stokes Solver ranges from magnitudes 10-14 to 10-17 m2. The results showed that as there is an increase in the effective porosity, geometric tortuosity decreases and water permeability increases. It is also observed that as the geometric tortuosity increases, the permeability decreases. These relationships are in agreement with previous reported literatures that use experimental and image analysis techniques. To model the relationship, the proposed mathematical model obtained is , with a correlation coefficient of 0.948. 2014-04-01T07:00:00Z text application/pdf https://animorepository.dlsu.edu.ph/etd_bachelors/11282 https://animorepository.dlsu.edu.ph/cgi/viewcontent.cgi?article=11927&context=etd_bachelors Bachelor's Theses English Animo Repository Lightweight concrete—Fracture Concrete— Deterioration Frost resistant concrete Chemical Engineering
institution De La Salle University
building De La Salle University Library
continent Asia
country Philippines
Philippines
content_provider De La Salle University Library
collection DLSU Institutional Repository
language English
topic Lightweight concrete—Fracture
Concrete— Deterioration
Frost resistant concrete
Chemical Engineering
spellingShingle Lightweight concrete—Fracture
Concrete— Deterioration
Frost resistant concrete
Chemical Engineering
Cortez, Shermaine M.
Papel, Regina Anne DC.
Tablada, Bernadette M.
Characterization of microstructure-transport properties of deteriorated cement paste from computed tomography (CT) images
description Pore structure, tortuosity and permeability are considered as key properties of porous materials such as cement pastes in understanding its durability. As such, image analysis techniques were used in this study to quantify pore size, effective porosity, tortuosity, and permeability from the microtomographic images of deteriorated pastes that were subjected to accelerated leaching. At a spatial resolution of 0.5 μm/voxel, the effective porosity (ϴe) was found to be in the ranges of 0.037 to 0.328. The characteristic pore size (d) using local thickness algorithm was found to be in the ranges of 1.406 to 3.589 microns. The geometric tortuosity (τ) based on random walk simulation in the percolating pore space was found to be in the ranges of 2.007 to 7.454. The permeability values (K) using NIST Permeability Stokes Solver ranges from magnitudes 10-14 to 10-17 m2. The results showed that as there is an increase in the effective porosity, geometric tortuosity decreases and water permeability increases. It is also observed that as the geometric tortuosity increases, the permeability decreases. These relationships are in agreement with previous reported literatures that use experimental and image analysis techniques. To model the relationship, the proposed mathematical model obtained is , with a correlation coefficient of 0.948.
format text
author Cortez, Shermaine M.
Papel, Regina Anne DC.
Tablada, Bernadette M.
author_facet Cortez, Shermaine M.
Papel, Regina Anne DC.
Tablada, Bernadette M.
author_sort Cortez, Shermaine M.
title Characterization of microstructure-transport properties of deteriorated cement paste from computed tomography (CT) images
title_short Characterization of microstructure-transport properties of deteriorated cement paste from computed tomography (CT) images
title_full Characterization of microstructure-transport properties of deteriorated cement paste from computed tomography (CT) images
title_fullStr Characterization of microstructure-transport properties of deteriorated cement paste from computed tomography (CT) images
title_full_unstemmed Characterization of microstructure-transport properties of deteriorated cement paste from computed tomography (CT) images
title_sort characterization of microstructure-transport properties of deteriorated cement paste from computed tomography (ct) images
publisher Animo Repository
publishDate 2014
url https://animorepository.dlsu.edu.ph/etd_bachelors/11282
https://animorepository.dlsu.edu.ph/cgi/viewcontent.cgi?article=11927&context=etd_bachelors
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