Investigating the influence of multi-walled carbon nanotubes on the mechanical and damping properties of ultra-high performance concrete

Zhang, Wenhua; Weizhao, Zeng; Zhang, Yunsheng; Fenghao, Yang; Wu, Peipei; Xu, Genqi; Gao, Yueyi

doi:10.1515/secm-2020-0046

Cited by 11 publications

(3 citation statements)

References 34 publications

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“…This seemed to be related to CNT agglomeration, which created defect sites in the cementitious matrix and may even act as a crack initiator. Zhang et al [72] observed MWCNT agglomeration using SEM, which justified it as a major cause of the mechanical and damping properties of HPC with MWCNT incorporation.…”

Section: Mechanical Strengthmentioning

confidence: 97%

Studying the Incorporation of Multi-Walled Carbon Nanotubes in High-Performance Concrete

Mesquita,

Matos,

Sousa

et al. 2023

Sustainability

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The current work aimed to study nanomodified HPC with multi-walled carbon nanotubes (MWCNT). The effect of MWCNT concentration, from 0% to 0.6% of cement weight, was evaluated on HPC multi-level output properties, namely, the flowability, mechanical strength, electrical resistivity, and microstructure. In addition, a tentative, simplified, and more cost-effective method based on dispersion of a high-pH solution of hydroxide was also adapted to disperse the MWCNT before incorporation in fresh HPC mixtures. Adding 0.2–0.6% MWCNT reduced HPC workability even with a higher superplasticiser dosage. The electrical resistivity was 484.58 Ω m for the HPC without MWCNT at 28 days of curing, while the samples with 0.2%, 0.4%, and 0.6% MWCNT presented 341.41 Ω m, 363.44 Ω m, and 360.34 Ω m, respectively. The use of 0.2–0.6% MWCNT in HPC decreased the flexural and compressive strength by 20% and 30%, respectively. The HPC performance decrease with MWCNT seemed to be related to relatively significant agglomerations of the long MWCNTs, namely, in HPC-0.6% samples. New developments are needed to state a simple and cost-effective dispersion method for MWCNT incorporation in HPC. In addition, smaller dosages of MWCNT are suggested for future research works.

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Section: Mechanical Strengthmentioning

confidence: 97%

Studying the Incorporation of Multi-Walled Carbon Nanotubes in High-Performance Concrete

Mesquita,

Matos,

Sousa

et al. 2023

Sustainability

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“…The agglomeration of CNTs resulted in a significant number of CNTs failing to adhere to the polymer matrix, thereby creating regions with structural defects in the nanocomposite material. 52…”

Section: Thermal Analysismentioning

confidence: 99%

The effect of novel advanced method on the properties of novolac hybrid nanocomposites reinforced with carbon nanotube and glass fiber

Kocaman

Çuvalcı

Çanakçı

2023

J of Applied Polymer Sci

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In this study, the effects of ball milling (BM) technique and carbon nanotube (CNT) content on the thermal and mechanical properties of hybrid reinforced composites were investigated. The composites were prepared using glass fiber (GF), novolac resin (No), and CNTs with different wt% (1, 2, and, 4). Various milling times were used to optimize the entanglement/agglomeration of CNTs in the polymer matrix and subsequently enhance the final thermal and mechanical properties. Through precise investigations, it was found that the nanocomposite with 2 wt% CNT reinforcement, subjected to 2 h of BM, exhibited remarkable enhancements in key properties. The tensile strength was significantly improved to 45.6 MPa, while the elastic modulus reached 3.419 GPa. Hardness was measured at 96 HRM, and thermal conductivity was enhanced to 0.463 W/mK. Moreover, this sample demonstrated a weight loss that was 43.65% lower compared to the sample reinforced with 1 wt% CNT and subjected to 1 h of BM. Overall, this study highlights the importance of optimizing the milling time and CNT content in the preparation of polymer nanocomposites, and it provides valuable insights for the development of advanced materials with superior performance in various applications.

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“…Therefore, NHCF has the best effect on improving the damping properties of cement mortar. However, OCF and NCF are attached to various hydration products and form strong bonds with the cement mortar matrix, preventing the fibers from debonding from the cement mortar matrix and hindering the dissipation of vibration energy (Zhang et al, 2020).…”

Section: Cement Mortar Matrix-fibers Shear Lag Modelmentioning

confidence: 99%

Enhancing the damping properties of cement mortar by pretreating coconut fibers for weakened interfaces

Tang

Jiang

et al. 2022

Journal of Cleaner Production

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Investigating the influence of multi-walled carbon nanotubes on the mechanical and damping properties of ultra-high performance concrete

Cited by 11 publications

References 34 publications

Studying the Incorporation of Multi-Walled Carbon Nanotubes in High-Performance Concrete

Studying the Incorporation of Multi-Walled Carbon Nanotubes in High-Performance Concrete

The effect of novel advanced method on the properties of novolac hybrid nanocomposites reinforced with carbon nanotube and glass fiber

Enhancing the damping properties of cement mortar by pretreating coconut fibers for weakened interfaces

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