Flexural creep of multi-wall carbon nanotube reinforced cement based composites under high stress level
Different concentrations (0–0.2 wt.%) of multiwall carbon nanotubes (MWCNT) was used to improve the mechanical properties of cementitious composites. The first part of the work showed that adding 0.05 wt.% of MWCNT produced a maximum reinforcement in terms of flexural and compressive strength. The s...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-05-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423011729 |
| _version_ | 1797798689424539648 |
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| author | Jun Huang Kai Xiao Denis Rodrigue |
| author_facet | Jun Huang Kai Xiao Denis Rodrigue |
| author_sort | Jun Huang |
| collection | DOAJ |
| description | Different concentrations (0–0.2 wt.%) of multiwall carbon nanotubes (MWCNT) was used to improve the mechanical properties of cementitious composites. The first part of the work showed that adding 0.05 wt.% of MWCNT produced a maximum reinforcement in terms of flexural and compressive strength. The second, the role of MWCNT on mechanical strength improvement was investigated. MWCNTs can absorb water to weaken the cement hydration at the beginning, and then, release water to promote the hydration of cement. The third part focused on using a home-made four-point bending testing device to study the flexural creep behavior under high stress levels (70, 80 and 90% of the flexural strength) and the results are discussed in terms of creep strain and Poisson ratio difference. The data obtained were also compared with the empirical creep models and the creep coefficients obtained were agreement with that from the AASHTO model. Finally, a regression analysis was used to fit the creep compliance of MWCNTs reinforced cementitious composites for the range of conditions studied. The results showed that the creep compliance can be fitted by a power-law for a stress level below 0.85, while a linear function was obtained above. |
| first_indexed | 2024-03-13T04:08:38Z |
| format | Article |
| id | doaj.art-b0d59bc65ef447789bebd9511d9650bd |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-13T04:08:38Z |
| publishDate | 2023-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-b0d59bc65ef447789bebd9511d9650bd2023-06-21T06:58:04ZengElsevierJournal of Materials Research and Technology2238-78542023-05-012498669883Flexural creep of multi-wall carbon nanotube reinforced cement based composites under high stress levelJun Huang0Kai Xiao1Denis Rodrigue2College of Civil Engineering and Architecture, Wenzhou University, Wenzhou, China; Key Laboratory of Engineering and Technology for Soft Soil Foundation and Tideland Reclamation of Zhejiang Province, Wenzhou, China; Wenzhou Engineering Technical Research Center on Building Energy Conservation and Emission Reduction & Disaster Prevention and Mitigation, Wenzhou, Zhejiang, China; Zhejiang Collaborative Innovation Center of Tideland Reclamation and Ecological Protection, Wenzhou, Zhejiang, China; Corresponding author.College of Civil Engineering and Architecture, Wenzhou University, Wenzhou, ChinaDepartment of Chemical Engineering, Laval University, Quebec, CanadaDifferent concentrations (0–0.2 wt.%) of multiwall carbon nanotubes (MWCNT) was used to improve the mechanical properties of cementitious composites. The first part of the work showed that adding 0.05 wt.% of MWCNT produced a maximum reinforcement in terms of flexural and compressive strength. The second, the role of MWCNT on mechanical strength improvement was investigated. MWCNTs can absorb water to weaken the cement hydration at the beginning, and then, release water to promote the hydration of cement. The third part focused on using a home-made four-point bending testing device to study the flexural creep behavior under high stress levels (70, 80 and 90% of the flexural strength) and the results are discussed in terms of creep strain and Poisson ratio difference. The data obtained were also compared with the empirical creep models and the creep coefficients obtained were agreement with that from the AASHTO model. Finally, a regression analysis was used to fit the creep compliance of MWCNTs reinforced cementitious composites for the range of conditions studied. The results showed that the creep compliance can be fitted by a power-law for a stress level below 0.85, while a linear function was obtained above.http://www.sciencedirect.com/science/article/pii/S2238785423011729Mechanical propertiesCreepCarbon nanotubeCementRegression analysis |
| spellingShingle | Jun Huang Kai Xiao Denis Rodrigue Flexural creep of multi-wall carbon nanotube reinforced cement based composites under high stress level Journal of Materials Research and Technology Mechanical properties Creep Carbon nanotube Cement Regression analysis |
| title | Flexural creep of multi-wall carbon nanotube reinforced cement based composites under high stress level |
| title_full | Flexural creep of multi-wall carbon nanotube reinforced cement based composites under high stress level |
| title_fullStr | Flexural creep of multi-wall carbon nanotube reinforced cement based composites under high stress level |
| title_full_unstemmed | Flexural creep of multi-wall carbon nanotube reinforced cement based composites under high stress level |
| title_short | Flexural creep of multi-wall carbon nanotube reinforced cement based composites under high stress level |
| title_sort | flexural creep of multi wall carbon nanotube reinforced cement based composites under high stress level |
| topic | Mechanical properties Creep Carbon nanotube Cement Regression analysis |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423011729 |
| work_keys_str_mv | AT junhuang flexuralcreepofmultiwallcarbonnanotubereinforcedcementbasedcompositesunderhighstresslevel AT kaixiao flexuralcreepofmultiwallcarbonnanotubereinforcedcementbasedcompositesunderhighstresslevel AT denisrodrigue flexuralcreepofmultiwallcarbonnanotubereinforcedcementbasedcompositesunderhighstresslevel |