Influence of Carbon Nanotubes on the Structure Formation of Cement Matrix

Petrunin, Sergey; Vaganov, V. E.; Reshetniak, V. V.; Zakrevskaya, Lubov

doi:10.1088/1757-899x/96/1/012046

Cited by 10 publications

(5 citation statements)

References 8 publications

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“…Similarly, the improved flexural strength and elastic modulus of MWCNT modified cement after curing for 3, 7, and 28 days were also investigated. At present, CNT reinforced cement-based materials mainly include: CNTs filling the pores of the matrix (Chaipanich et al, 2010), CNT bridge microcracks in the matrix, and CNTs promoting the growth of C-S-H through nucleation (Alizadeh et al, 2009;Cui et al, 2015;Petrunin et al, 2015;Sikora et al, 2019). These mechanisms could improve the durability of cementitious materials.…”

Section: D Printing Concretementioning

confidence: 99%

Developments and Applications of Carbon Nanotube Reinforced Cement-Based Composites as Functional Building Materials

et al. 2022

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Carbon nanotube (CNT) is a promising nanomaterial with excellent mechanical, electrical, thermal, and chemical stability. It has received extensive attention due to its unique multifunctional properties in engineering materials. Researchers have explored the preparation and characterization of CNT reinforced cement-based materials. Studies have shown that adding CNT will significantly improve the performance of cement-based materials. This article introduces the techniques for the dispersion characterization of CNT and summarizes the advantages and disadvantages of these techniques. The functionalized applications of CNT in cement-based materials are reviewed, including sensing performance, structural health monitoring of concrete, electromagnetic shielding, and other applications. In addition, the application and development prospects of CNT in 3D printing concrete have been prospected. Finally, we discussed the existing problems and challenges in developing and applying CNT in cement-based materials and suggested future research.

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Section: D Printing Concretementioning

confidence: 99%

Developments and Applications of Carbon Nanotube Reinforced Cement-Based Composites as Functional Building Materials

et al. 2022

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“…It was found that MWCNTs can improve the mechanical properties of foam concrete and reduce thermal conductivity due to the modified structure of the pore walls and a more even distribution of the pores by size. In addition, MWCNTs can act as bridges between nano-sized cracks or voids to increase crack resistance and ductility [12,35]. A study [36] investigated lightweight foam concretes without and with the addition of MWCNTs.…”

Section: Introductionmentioning

confidence: 99%

The Role of MWCNTs in Enhancing the Foam Stability and Rheological Behavior of Cement Pastes That Contain Air-Entraining and Superplasticizer Admixtures

Pundienė,

Pranckevičienė

2023

Nanomaterials

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This research delves into the intricate dynamics between multi-walled carbon nanotubes (MWCNTs), air-entraining admixtures (AEAs), and a range of superplasticizers (SPs) in cementitious systems, shedding light on key aspects of construction material innovation. The focus is on how MWCNTs, AEAs, and specific SPs—namely, lignosulfonate (LS), polycarboxylate (PCE), and polyacrylate (PA)—influence the stability of foams and the viscosity and setting times of cement pastes. To assess the impacts of these components, we employed foam stability assessments, viscosity measurement techniques, electrical conductivity analysis, and evaluations of dispersion and setting times. Results indicate that MWCNTs enhance foam stability and viscosity, with the degree of improvement contingent on the type and concentration of SPs and the presence of AEAs. Notably, SPs, particularly PCE and PA, markedly influence the properties of cement paste, including increasing dispersion values and modulating setting times, especially when combined with MWCNTs and AEAs. The study concludes that strategically combining MWCNTs with specific SPs and AEAs alters the physical properties of cementitious materials significantly, underscoring the potential for customizing material design in the construction sector.

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“…In addition, the very high specific surface area (SSA) of CNT tends to accelerate the early hydration kinetics of cement, resulting in mechanical strength gains even at early ages [5][6][7][8]. However, properly dispersing CNT is a challenge due to its high SSA, clustering formation, and Van der Waals attractive forces [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Combined Functionalization of Carbon Nanotubes (CNT) Fibers with H2SO4/HNO3 and Ca(OH)2 for Addition in Cementitious Matrix

Batiston

Matos

Gleize

et al. 2021

Fibers

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Acid treatment is commonly used to improve the dispersion of carbon nanotubes (CNT) in a cementitious matrix, but it causes undesired delay on cement hydration kinetics. This work reports a combined CNT functionalization method with H2SO4/HNO3 and Ca(OH)2 for addition in a cementitious matrix. Results showed that the Ca(OH)2 exposure neutralized the active sites generated by acid exposure, compensating the delay in hydration. As a result, CNT exposed to H2SO4/HNO3 for 9 h and further Ca(OH)2 treatment led to equivalent hydration kinetics than un-treated CNT did with improved stability.

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Influence of Carbon Nanotubes on the Structure Formation of Cement Matrix

Cited by 10 publications

References 8 publications

Developments and Applications of Carbon Nanotube Reinforced Cement-Based Composites as Functional Building Materials

Developments and Applications of Carbon Nanotube Reinforced Cement-Based Composites as Functional Building Materials

The Role of MWCNTs in Enhancing the Foam Stability and Rheological Behavior of Cement Pastes That Contain Air-Entraining and Superplasticizer Admixtures

Combined Functionalization of Carbon Nanotubes (CNT) Fibers with H2SO4/HNO3 and Ca(OH)2 for Addition in Cementitious Matrix

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