The Relationship between Mechanical Properties and Gradual Deterioration of Microstructures of Rock Mass Subject to Freeze-thaw Cycles

Under freeze-thaw cycles, the relationship between rock microstructure deterioration and its macroscopic mechanical characteristics has drawn extensive attention from engineers. With the objective to incorporate freeze-thaw cycle experiment into headrace tunnel engineering, in the present study two...

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Autores:
Jiang, Haibo
Tipo de recurso:
Article of journal
Fecha de publicación:
2018
Institución:
Universidad Nacional de Colombia
Repositorio:
Universidad Nacional de Colombia
Idioma:
spa
OAI Identifier:
oai:repositorio.unal.edu.co:unal/63562
Acceso en línea:
https://repositorio.unal.edu.co/handle/unal/63562
http://bdigital.unal.edu.co/64008/
Palabra clave:
55 Ciencias de la tierra / Earth sciences and geology
Freeze-thaw cycle
microstructure
progressive deterioration
strength damage
Ciclo congelación-descongelación
microestructura
deterioro progresivo
daño a la resistencia de la roca
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openAccess
License
Atribución-NoComercial 4.0 Internacional
id UNACIONAL2_5facb14ddd9510bac39fd67f4978d67b
oai_identifier_str oai:repositorio.unal.edu.co:unal/63562
network_acronym_str UNACIONAL2
network_name_str Universidad Nacional de Colombia
repository_id_str
dc.title.spa.fl_str_mv The Relationship between Mechanical Properties and Gradual Deterioration of Microstructures of Rock Mass Subject to Freeze-thaw Cycles
title The Relationship between Mechanical Properties and Gradual Deterioration of Microstructures of Rock Mass Subject to Freeze-thaw Cycles
spellingShingle The Relationship between Mechanical Properties and Gradual Deterioration of Microstructures of Rock Mass Subject to Freeze-thaw Cycles
55 Ciencias de la tierra / Earth sciences and geology
Freeze-thaw cycle
microstructure
progressive deterioration
strength damage
Ciclo congelación-descongelación
microestructura
deterioro progresivo
daño a la resistencia de la roca
title_short The Relationship between Mechanical Properties and Gradual Deterioration of Microstructures of Rock Mass Subject to Freeze-thaw Cycles
title_full The Relationship between Mechanical Properties and Gradual Deterioration of Microstructures of Rock Mass Subject to Freeze-thaw Cycles
title_fullStr The Relationship between Mechanical Properties and Gradual Deterioration of Microstructures of Rock Mass Subject to Freeze-thaw Cycles
title_full_unstemmed The Relationship between Mechanical Properties and Gradual Deterioration of Microstructures of Rock Mass Subject to Freeze-thaw Cycles
title_sort The Relationship between Mechanical Properties and Gradual Deterioration of Microstructures of Rock Mass Subject to Freeze-thaw Cycles
dc.creator.fl_str_mv Jiang, Haibo
dc.contributor.author.spa.fl_str_mv Jiang, Haibo
dc.subject.ddc.spa.fl_str_mv 55 Ciencias de la tierra / Earth sciences and geology
topic 55 Ciencias de la tierra / Earth sciences and geology
Freeze-thaw cycle
microstructure
progressive deterioration
strength damage
Ciclo congelación-descongelación
microestructura
deterioro progresivo
daño a la resistencia de la roca
dc.subject.proposal.spa.fl_str_mv Freeze-thaw cycle
microstructure
progressive deterioration
strength damage
Ciclo congelación-descongelación
microestructura
deterioro progresivo
daño a la resistencia de la roca
description Under freeze-thaw cycles, the relationship between rock microstructure deterioration and its macroscopic mechanical characteristics has drawn extensive attention from engineers. With the objective to incorporate freeze-thaw cycle experiment into headrace tunnel engineering, in the present study two groups of andesite rock samples in different states are tested under the conditions of the lowest freezing temperature of –40 ℃ and the thawing temperature of 20 ℃. Damage detection was performed by magnetic resonance imaging for the interior microstructure of rock samples subject to different freeze-thaw cycles, and the relationship between the sample mechanical properties and gradual deterioration of rock microstructures was discussed. The results demonstrate evident influence of freeze-thaw cycle on the damage and deterioration of internal pore structure in andesite, and the rock uniaxial compressive strength and elasticity modulus exhibit a decreasing trend with the increase of freeze-thaw cycles. After 40 cycles, the strength of naturally saturated rock samples decreases by 39.4% (equivalent to 69.4 MPa) and the elasticity modulus drops by 47.46% (equivalent to 3.27 GPa). For rock samples saturated by vacuum, 40 freeze-thaw cycles lead to a decrease of 36.86% (equivalent to 58.2 MPa) in rock strength and a drop of 44.85% (equivalent to 2.83 GPa) in elasticity modulus. Therefore, the test results quantitatively elucidate the substantial influence of freeze-thaw cycle on the damage and deterioration of internal structure in andesite.
publishDate 2018
dc.date.issued.spa.fl_str_mv 2018-01-01
dc.date.accessioned.spa.fl_str_mv 2019-07-02T21:54:09Z
dc.date.available.spa.fl_str_mv 2019-07-02T21:54:09Z
dc.type.spa.fl_str_mv Artículo de revista
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dc.type.driver.spa.fl_str_mv info:eu-repo/semantics/article
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dc.type.coar.spa.fl_str_mv http://purl.org/coar/resource_type/c_6501
dc.type.coarversion.spa.fl_str_mv http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.content.spa.fl_str_mv Text
dc.type.redcol.spa.fl_str_mv http://purl.org/redcol/resource_type/ART
format http://purl.org/coar/resource_type/c_6501
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dc.identifier.issn.spa.fl_str_mv ISSN: 2339-3459
dc.identifier.uri.none.fl_str_mv https://repositorio.unal.edu.co/handle/unal/63562
dc.identifier.eprints.spa.fl_str_mv http://bdigital.unal.edu.co/64008/
identifier_str_mv ISSN: 2339-3459
url https://repositorio.unal.edu.co/handle/unal/63562
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dc.language.iso.spa.fl_str_mv spa
language spa
dc.relation.spa.fl_str_mv https://revistas.unal.edu.co/index.php/esrj/article/view/66108
dc.relation.ispartof.spa.fl_str_mv Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal
Earth Sciences Research Journal
dc.relation.references.spa.fl_str_mv Jiang, Haibo (2018) The Relationship between Mechanical Properties and Gradual Deterioration of Microstructures of Rock Mass Subject to Freeze-thaw Cycles. Earth Sciences Research Journal, 22 (1). pp. 53-57. ISSN 2339-3459
dc.rights.spa.fl_str_mv Derechos reservados - Universidad Nacional de Colombia
dc.rights.coar.fl_str_mv http://purl.org/coar/access_right/c_abf2
dc.rights.license.spa.fl_str_mv Atribución-NoComercial 4.0 Internacional
dc.rights.uri.spa.fl_str_mv http://creativecommons.org/licenses/by-nc/4.0/
dc.rights.accessrights.spa.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv Atribución-NoComercial 4.0 Internacional
Derechos reservados - Universidad Nacional de Colombia
http://creativecommons.org/licenses/by-nc/4.0/
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.mimetype.spa.fl_str_mv application/pdf
dc.publisher.spa.fl_str_mv Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Departamento de Geociencia
institution Universidad Nacional de Colombia
bitstream.url.fl_str_mv https://repositorio.unal.edu.co/bitstream/unal/63562/1/66108-380287-2-PB.pdf
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bitstream.checksum.fl_str_mv a3d782f874093f9e2566c575111b1eb7
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repository.name.fl_str_mv Repositorio Institucional Universidad Nacional de Colombia
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spelling Atribución-NoComercial 4.0 InternacionalDerechos reservados - Universidad Nacional de Colombiahttp://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Jiang, Haiboca523449-9134-46ca-877f-9be0b0ce9bae3002019-07-02T21:54:09Z2019-07-02T21:54:09Z2018-01-01ISSN: 2339-3459https://repositorio.unal.edu.co/handle/unal/63562http://bdigital.unal.edu.co/64008/Under freeze-thaw cycles, the relationship between rock microstructure deterioration and its macroscopic mechanical characteristics has drawn extensive attention from engineers. With the objective to incorporate freeze-thaw cycle experiment into headrace tunnel engineering, in the present study two groups of andesite rock samples in different states are tested under the conditions of the lowest freezing temperature of –40 ℃ and the thawing temperature of 20 ℃. Damage detection was performed by magnetic resonance imaging for the interior microstructure of rock samples subject to different freeze-thaw cycles, and the relationship between the sample mechanical properties and gradual deterioration of rock microstructures was discussed. The results demonstrate evident influence of freeze-thaw cycle on the damage and deterioration of internal pore structure in andesite, and the rock uniaxial compressive strength and elasticity modulus exhibit a decreasing trend with the increase of freeze-thaw cycles. After 40 cycles, the strength of naturally saturated rock samples decreases by 39.4% (equivalent to 69.4 MPa) and the elasticity modulus drops by 47.46% (equivalent to 3.27 GPa). For rock samples saturated by vacuum, 40 freeze-thaw cycles lead to a decrease of 36.86% (equivalent to 58.2 MPa) in rock strength and a drop of 44.85% (equivalent to 2.83 GPa) in elasticity modulus. Therefore, the test results quantitatively elucidate the substantial influence of freeze-thaw cycle on the damage and deterioration of internal structure in andesite.En el ciclo de congelación y descongelación, la relación entre el deterioro de la microestructura de la roca y sus características mecánicas macroscópicas ha atraido un amplio interés de los investigadores. Con el objetivo de incorporar las pruebas del ciclo congelación y descongelación del canal de un túnel, en este estudio se evaluaron dos grupos de muestras de andesitas en diferentes estados bajo las condiciones de congelación a -40 ºC y de descongelación a 20 ºC. La detección del daño se realizó por el escaneo de resonancia magnética en el interior de la microestructura de las muestras de roca sujetas a diferentes ciclos de congelación y descongelación, y se analizó la relación entre las propiedades mecánicas de las muestras y el deterioro gradual de las microestructuras de la roca. Los resultados muestran una influencia evidente del ciclo de congelación y descongelación en el daño y deterioro de la estructura interna de los poros de la andesita y la fuerza compresiva uniaxial de la roca, mientras el módulo de elasticidad presenta una tendencia decreciente con el incremento de los ciclos aplicados. Después de 40 ciclos, la fuerza de las muestras de roca saturadas naturalmente cae en un 39,4 % (el equivalente a 69,4 MPa) y el modulo de elasticidad baja en un 47,46 % (equivalente al 3,27 GPa). Para las muestras saturadas por aspiradora, los cuarenta ciclos de congelación y descongelación llevan a un decrecimiento del 36,86 % (equivalente a 58,2 MPa) en la fuerza de la roca y una bajada del 44,85 % (equivalente a 2.83 GPa) en el módulo de elasticidad. Además, los resultados de la evaluación cuantitativa esclarecen la influencia sustancial de los ciclos de congelación y descongelación en el daño y deterioro de la estructura interna de la andesita.application/pdfspaUniversidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Departamento de Geocienciahttps://revistas.unal.edu.co/index.php/esrj/article/view/66108Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research JournalEarth Sciences Research JournalJiang, Haibo (2018) The Relationship between Mechanical Properties and Gradual Deterioration of Microstructures of Rock Mass Subject to Freeze-thaw Cycles. Earth Sciences Research Journal, 22 (1). pp. 53-57. ISSN 2339-345955 Ciencias de la tierra / Earth sciences and geologyFreeze-thaw cyclemicrostructureprogressive deteriorationstrength damageCiclo congelación-descongelaciónmicroestructuradeterioro progresivodaño a la resistencia de la rocaThe Relationship between Mechanical Properties and Gradual Deterioration of Microstructures of Rock Mass Subject to Freeze-thaw CyclesArtículo de revistainfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501http://purl.org/coar/resource_type/c_2df8fbb1http://purl.org/coar/version/c_970fb48d4fbd8a85Texthttp://purl.org/redcol/resource_type/ARTORIGINAL66108-380287-2-PB.pdfapplication/pdf629081https://repositorio.unal.edu.co/bitstream/unal/63562/1/66108-380287-2-PB.pdfa3d782f874093f9e2566c575111b1eb7MD51THUMBNAIL66108-380287-2-PB.pdf.jpg66108-380287-2-PB.pdf.jpgGenerated Thumbnailimage/jpeg7373https://repositorio.unal.edu.co/bitstream/unal/63562/2/66108-380287-2-PB.pdf.jpgf6245f8946d637570e7b25c51d5451cdMD52unal/63562oai:repositorio.unal.edu.co:unal/635622023-04-22 23:05:13.48Repositorio Institucional Universidad Nacional de Colombiarepositorio_nal@unal.edu.co

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