Effect of multi-walled carbon nanotube on reactive powder concrete (RPC) performance in sulfate dry-wet cycling environment

Kan, Deyuan; Cao, Shiyi; Chen, Zhengfa; Lyu, Qifeng

doi:10.1016/j.conbuildmat.2022.128075

Cited by 15 publications

(1 citation statement)

References 51 publications

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“…The percentages of pores of 5.4~5.7 mm, 5.7~6 mm, and 6~6.3 mm were reduced by 26.55%, 75.51%, and 63.26%, respectively. MWCNTs can improve the internal pore structure of concrete since MWCNTs act as fillers to fill pores and cracks and as fibers to bridge cracks [ 50 ]. It is evident that large pores appeared for a higher W/C after 150 sulfate dry–wet cycles, and the addition of MWCNTs served further to optimize the internal pore structure of the concrete, making it denser inside.…”

Section: Resultsmentioning

confidence: 99%

Research on Performance Deterioration of Multi-Walled Carbon Nanotube–Lithium Slag Concrete under the Coupling Effect of Sulfate Attack and Dry–Wet Cycles

et al. 2023

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Sulfate attack is one of the main factors affecting the durability of concrete structures. In recent years, multi-walled carbon nanotubes (MWCNTs) have attracted the attention of scholars for their excellent mechanical properties and durability performance. In this paper, the influence of sulfate attack and dry–wet cycles on the performance of multi-walled carbon nanotube–lithium slag concrete (MWCNT-LSC) with varied MWCNT content (0 wt.%, 0.05 wt.%, 0.10 wt.%, and 0.15 wt.%) and varied water–cement ratios (0.35, 0.40, and 0.45) were investigated. In addition, scanning electron microscopy (SEM) and X-ray computed tomography (CT) tests were conducted to analyze the microstructure and pore structure of the concrete. The results showed that concrete incorporated with MWCNTs could effectively mitigate sulfate attack. The resistance to sulfate attack of concrete was negatively related to the water–cement ratio when the dry–wet cycle was fixed. The MWCNT-LSC showed the best compressive strength at the water–cement ratio of 0.35 and 0.10 wt.% MWCNTs. The SEM test results showed that the MWCNTs filled the pores and cracks within the specimen and formed bridges between the cracks, enhancing the resistance to sulfate attack. The CT test results also showed that the addition of MWCNTs could reduce the porosity of concrete, refine the pore size and inhibit the generation and development of cracks, thus optimizing the internal structure of concrete and improving its resistance to sulfate attack.

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Section: Resultsmentioning

confidence: 99%

Research on Performance Deterioration of Multi-Walled Carbon Nanotube–Lithium Slag Concrete under the Coupling Effect of Sulfate Attack and Dry–Wet Cycles

et al. 2023

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An experimental investigation of thermal characteristics of graphene oxide and multi walled carbon nanotechnology in cementitious composites

2023

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Properties, applications, and prospects of carbon nanotubes in the construction industry

Yang

2023

Archit. Struct. Constr.

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Nanotechnology and nanomaterials have offered sustainable design options for the built environment and enabled architects to design more flexible architectural forms. Carbon nanotubes have excellent mechanical, electrical, thermal, and chemical properties and are useful in a wide range of engineering applications. However, the role of carbon nanotube composites as a functional construction material has large potential and awaits further investigation and exploration. This paper gives an overview of the synthesis and fabrication methods of carbon nanotubes, carbon nanotube properties, different forms of carbon nanotube composites, and application of carbon nanotubes in the construction industry. To explore the prospects for construction use, the aesthetic, structural, and functional characteristics of several futuristic building projects are discussed. This overview proposes a promising material approach for the application of carbon nanotubes in construction and explains the related opportunities and challenges.

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Effect of multi-walled carbon nanotube on reactive powder concrete (RPC) performance in sulfate dry-wet cycling environment

Cited by 15 publications

References 51 publications

Research on Performance Deterioration of Multi-Walled Carbon Nanotube–Lithium Slag Concrete under the Coupling Effect of Sulfate Attack and Dry–Wet Cycles

Research on Performance Deterioration of Multi-Walled Carbon Nanotube–Lithium Slag Concrete under the Coupling Effect of Sulfate Attack and Dry–Wet Cycles

An experimental investigation of thermal characteristics of graphene oxide and multi walled carbon nanotechnology in cementitious composites

Properties, applications, and prospects of carbon nanotubes in the construction industry

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