Preparation and piezoresistivity of carbon nanotube-coated sand reinforced cement mortar
Water and sand were used as the medium of multiwall carbon nanotube (MCNT) and prepared MCNT aqueous suspension and MCNT suspension-coated sand, respectively; afterwards, they were introduced into cement mortar (MNT/CM, MNTSM), respectively. Next, mechanical strengths and piezoresistive properties (...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2020-12-01
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| Series: | Nanotechnology Reviews |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/ntrev-2020-0112 |
| _version_ | 1819120841190801408 |
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| author | Gao Song Luo Jianlin Zhang Jigang Teng Fei Liu Chao Feng Chao Yuan Qian |
| author_facet | Gao Song Luo Jianlin Zhang Jigang Teng Fei Liu Chao Feng Chao Yuan Qian |
| author_sort | Gao Song |
| collection | DOAJ |
| description | Water and sand were used as the medium of multiwall carbon nanotube (MCNT) and prepared MCNT aqueous suspension and MCNT suspension-coated sand, respectively; afterwards, they were introduced into cement mortar (MNT/CM, MNTSM), respectively. Next, mechanical strengths and piezoresistive properties (DC resistivities (ρ
v), AC impedances (Z
r)) under cyclic loadings (σ
c) of two types of MNT/CM and MNTSM nanocomposites were investigated to explore the intrinsic and self-sensing behaviors. Results reveal that MCNT can be evenly and well-coated on sand, which favors to achieve its intrinsic self-sensing property. Although the fraction changes in ρ
v and Z
r under the same σ
c of MNTSM are both lower than those of MNT/CM, the stress sensitivity of MNTSM is only −1.16%/MPa (DC resistivity), −1.55%/MPa (AC impedance); its sensing linearity and stability (2.53, 2.45%; 2.73, 2.67%) are superior to those of MNT/CM (4.94, 2.57%; 3.78, 2.96%). Piezoresistivity using AC impedance technique is helpful to acquire balanced sensing sensitivity and stability while applied as intrinsic sensors in infrastructure. |
| first_indexed | 2024-12-22T06:27:04Z |
| format | Article |
| id | doaj.art-d1e7517448b94e9889ddf7923b111d40 |
| institution | Directory Open Access Journal |
| issn | 2191-9097 |
| language | English |
| last_indexed | 2024-12-22T06:27:04Z |
| publishDate | 2020-12-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanotechnology Reviews |
| spelling | doaj.art-d1e7517448b94e9889ddf7923b111d402022-12-21T18:35:50ZengDe GruyterNanotechnology Reviews2191-90972020-12-01911445145510.1515/ntrev-2020-0112ntrev-2020-0112Preparation and piezoresistivity of carbon nanotube-coated sand reinforced cement mortarGao Song0Luo Jianlin1Zhang Jigang2Teng Fei3Liu Chao4Feng Chao5Yuan Qian6Department of Materials Science and Technology, School of Civil Engineering, Qingdao University of Technology, Qingdao, 266525, ChinaDepartment of Materials Science and Technology, School of Civil Engineering, Qingdao University of Technology, Qingdao, 266525, ChinaDepartment of Materials Science and Technology, School of Civil Engineering, Qingdao University of Technology, Qingdao, 266525, ChinaDepartment of Materials Science and Technology, School of Civil Engineering, Qingdao University of Technology, Qingdao, 266525, ChinaSchool of Civil Engineering, Qingdao University of Technology, Qingdao, 266525, ChinaDepartment of Materials Science and Technology, School of Civil Engineering, Qingdao University of Technology, Qingdao, 266525, ChinaDepartment of Materials Science and Technology, School of Civil Engineering, Qingdao University of Technology, Qingdao, 266525, ChinaWater and sand were used as the medium of multiwall carbon nanotube (MCNT) and prepared MCNT aqueous suspension and MCNT suspension-coated sand, respectively; afterwards, they were introduced into cement mortar (MNT/CM, MNTSM), respectively. Next, mechanical strengths and piezoresistive properties (DC resistivities (ρ v), AC impedances (Z r)) under cyclic loadings (σ c) of two types of MNT/CM and MNTSM nanocomposites were investigated to explore the intrinsic and self-sensing behaviors. Results reveal that MCNT can be evenly and well-coated on sand, which favors to achieve its intrinsic self-sensing property. Although the fraction changes in ρ v and Z r under the same σ c of MNTSM are both lower than those of MNT/CM, the stress sensitivity of MNTSM is only −1.16%/MPa (DC resistivity), −1.55%/MPa (AC impedance); its sensing linearity and stability (2.53, 2.45%; 2.73, 2.67%) are superior to those of MNT/CM (4.94, 2.57%; 3.78, 2.96%). Piezoresistivity using AC impedance technique is helpful to acquire balanced sensing sensitivity and stability while applied as intrinsic sensors in infrastructure.https://doi.org/10.1515/ntrev-2020-0112carbon nanotubedispersion methodcnt-coated sandac impedancepiezoresistive property |
| spellingShingle | Gao Song Luo Jianlin Zhang Jigang Teng Fei Liu Chao Feng Chao Yuan Qian Preparation and piezoresistivity of carbon nanotube-coated sand reinforced cement mortar Nanotechnology Reviews carbon nanotube dispersion method cnt-coated sand ac impedance piezoresistive property |
| title | Preparation and piezoresistivity of carbon nanotube-coated sand reinforced cement mortar |
| title_full | Preparation and piezoresistivity of carbon nanotube-coated sand reinforced cement mortar |
| title_fullStr | Preparation and piezoresistivity of carbon nanotube-coated sand reinforced cement mortar |
| title_full_unstemmed | Preparation and piezoresistivity of carbon nanotube-coated sand reinforced cement mortar |
| title_short | Preparation and piezoresistivity of carbon nanotube-coated sand reinforced cement mortar |
| title_sort | preparation and piezoresistivity of carbon nanotube coated sand reinforced cement mortar |
| topic | carbon nanotube dispersion method cnt-coated sand ac impedance piezoresistive property |
| url | https://doi.org/10.1515/ntrev-2020-0112 |
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