Effects of ultrasonication on electrical and self-sensing properties for fiber-reinforced cementitious composites containing MWCNTs
The uniform dispersion of carbon nanotubes (CNTs) is essential for enhancing the mechanical and electrical properties of cement composites. This improvement significantly increases their potential for use in embedded self-sensing applications within structural health monitoring (SHM) systems, which...
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Elsevier
2025-01-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424029612 |
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| author | Jin-Seok Woo Ai-Hua Jin Hyun-Do Yun Junhee Yu Je Hyun Bae Sun-Woo Kim Soo-Yeon Seo Gun-Cheol Lee Seongwon Hong Kang-Soo Kim Sangyoung Han |
| author_facet | Jin-Seok Woo Ai-Hua Jin Hyun-Do Yun Junhee Yu Je Hyun Bae Sun-Woo Kim Soo-Yeon Seo Gun-Cheol Lee Seongwon Hong Kang-Soo Kim Sangyoung Han |
| author_sort | Jin-Seok Woo |
| collection | DOAJ |
| description | The uniform dispersion of carbon nanotubes (CNTs) is essential for enhancing the mechanical and electrical properties of cement composites. This improvement significantly increases their potential for use in embedded self-sensing applications within structural health monitoring (SHM) systems, which are defined as systems for monitoring, assessing, and evaluating structural conditions. To take advantage of this benefit, multi-walled carbon nanotubes (MWCNTs) were incorporated into fiber-reinforced cementitious composites, and the optimal method for achieving uniform dispersion was investigated by applying a specific ultrasonic dispersion energy level. The results revealed that the E500-CFRC specimen, treated with an ultrasonic energy of 500 J, achieved proper dispersion of MWCNTs, as evidenced by SEM images. This uniform dispersion significantly improved its mechanical strengths compared to other specimens. Additionally, this optimal dispersion within the cementitious composite enhanced self-sensing capability, accuracy to strain changes, and repeatability, indicating strong self-sensing capabilities. These results were validated by the strongest linear correlation observed between fractional change in resistance and compressive strain, with an R2 value of 0.935, outperforming other specimens. Furthermore, the proposed method enables well-dispersed MWCNTs to be integrated into a pre-mixed cementitious composite using the standardized mixing method, making it adaptable to a variety of cementitious mixtures. Given the limited research on the self-SHM performance of MWCNTs-filled cementitious composites under varying ultrasonic dispersion energy levels, this study contributes significantly to advancing the self-monitoring capabilities of reinforced concrete structures. |
| format | Article |
| id | doaj-art-443035bc9ccc4e90a6b3d742e4d8d643 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-443035bc9ccc4e90a6b3d742e4d8d6432025-01-19T06:25:39ZengElsevierJournal of Materials Research and Technology2238-78542025-01-013415091528Effects of ultrasonication on electrical and self-sensing properties for fiber-reinforced cementitious composites containing MWCNTsJin-Seok Woo0Ai-Hua Jin1Hyun-Do Yun2Junhee Yu3Je Hyun Bae4Sun-Woo Kim5Soo-Yeon Seo6Gun-Cheol Lee7Seongwon Hong8Kang-Soo Kim9Sangyoung Han10Department of Architectural Engineering, Chungnam National University, Daejeon, 34134, Republic of KoreaDepartment of Architectural Engineering, Chungnam National University, Daejeon, 34134, Republic of KoreaDepartment of Architectural Engineering, Chungnam National University, Daejeon, 34134, Republic of Korea; Corresponding author.Graduate School of Analytical Science and Technology (GRAST), Chungnam National University, Daejeon, 34134, Republic of KoreaGraduate School of Analytical Science and Technology (GRAST), Chungnam National University, Daejeon, 34134, Republic of KoreaDepartment of Construction Engineering Education, Chungnam National University, Daejeon, 34134, Republic of Korea; Corresponding author.Department of Architectural Engineering, Korea National University of Transportation, Chungju, 27469, Republic of KoreaDepartment of Architectural Engineering, Korea National University of Transportation, Chungju, 27469, Republic of KoreaDepartment of Safety Engineering, Korea National University of Transportation, Chungju, 27469, Republic of KoreaDepartment of Architectural Engineering, University of Seoul, Seoul, 02504, Republic of KoreaDepartment of ICT Integrated Ocean Smart City Engineering, Dong-A University, Busan, 49315, Republic of Korea; Corresponding author.The uniform dispersion of carbon nanotubes (CNTs) is essential for enhancing the mechanical and electrical properties of cement composites. This improvement significantly increases their potential for use in embedded self-sensing applications within structural health monitoring (SHM) systems, which are defined as systems for monitoring, assessing, and evaluating structural conditions. To take advantage of this benefit, multi-walled carbon nanotubes (MWCNTs) were incorporated into fiber-reinforced cementitious composites, and the optimal method for achieving uniform dispersion was investigated by applying a specific ultrasonic dispersion energy level. The results revealed that the E500-CFRC specimen, treated with an ultrasonic energy of 500 J, achieved proper dispersion of MWCNTs, as evidenced by SEM images. This uniform dispersion significantly improved its mechanical strengths compared to other specimens. Additionally, this optimal dispersion within the cementitious composite enhanced self-sensing capability, accuracy to strain changes, and repeatability, indicating strong self-sensing capabilities. These results were validated by the strongest linear correlation observed between fractional change in resistance and compressive strain, with an R2 value of 0.935, outperforming other specimens. Furthermore, the proposed method enables well-dispersed MWCNTs to be integrated into a pre-mixed cementitious composite using the standardized mixing method, making it adaptable to a variety of cementitious mixtures. Given the limited research on the self-SHM performance of MWCNTs-filled cementitious composites under varying ultrasonic dispersion energy levels, this study contributes significantly to advancing the self-monitoring capabilities of reinforced concrete structures.http://www.sciencedirect.com/science/article/pii/S2238785424029612Structural health monitoringSelf-sensing capabilityMulti-walled carbon nanotubesMWCNTs-filled cementitious compositePolyethylene fiberSteel fiber |
| spellingShingle | Jin-Seok Woo Ai-Hua Jin Hyun-Do Yun Junhee Yu Je Hyun Bae Sun-Woo Kim Soo-Yeon Seo Gun-Cheol Lee Seongwon Hong Kang-Soo Kim Sangyoung Han Effects of ultrasonication on electrical and self-sensing properties for fiber-reinforced cementitious composites containing MWCNTs Journal of Materials Research and Technology Structural health monitoring Self-sensing capability Multi-walled carbon nanotubes MWCNTs-filled cementitious composite Polyethylene fiber Steel fiber |
| title | Effects of ultrasonication on electrical and self-sensing properties for fiber-reinforced cementitious composites containing MWCNTs |
| title_full | Effects of ultrasonication on electrical and self-sensing properties for fiber-reinforced cementitious composites containing MWCNTs |
| title_fullStr | Effects of ultrasonication on electrical and self-sensing properties for fiber-reinforced cementitious composites containing MWCNTs |
| title_full_unstemmed | Effects of ultrasonication on electrical and self-sensing properties for fiber-reinforced cementitious composites containing MWCNTs |
| title_short | Effects of ultrasonication on electrical and self-sensing properties for fiber-reinforced cementitious composites containing MWCNTs |
| title_sort | effects of ultrasonication on electrical and self sensing properties for fiber reinforced cementitious composites containing mwcnts |
| topic | Structural health monitoring Self-sensing capability Multi-walled carbon nanotubes MWCNTs-filled cementitious composite Polyethylene fiber Steel fiber |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424029612 |
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