Comparative evaluation of the effectiveness of PTFE nanoparticles on cement pastes properties with multi-wall carbon nanotubes, graphene oxide and silver nanoparticles

Şimşek, Barış; Uygunoğlu, Tayfun; Dilmaç, Ömer Faruk

doi:10.1016/j.conbuildmat.2021.126077

Cited by 7 publications

(2 citation statements)

References 56 publications

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“…UPV values vary with the porous structure of the material [40]. Higher UPV values indicate good material quality, while lower UPV values indicate that the structure may have many cracks or voids.…”

Section: Ultrasonic Pulse Velocitymentioning

confidence: 99%

The Effects of Calcium Nitrite on the Mechanical Properties and Microstructure of Early-Age Frozen Cement Paste

Wan,

Yu,

et al. 2024

Materials

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The objective of this paper is to investigate the effect of calcium nitrite (CN) on improving the mechanical properties and microstructures of early-frozen cement paste. Cement pastes containing 1%, 1.5%, 2%, 2.5%, and 3% CN were prepared. One batch of samples was frozen at −6 °C for 7 days and then cured at 20 °C, and the other batch of samples was directly cured at 20 °C as a control. The compressive strength, ultrasonic pulse velocity, and resistivity of all specimens at different target ages were measured under these two curing conditions. The hydration products and microstructures of typical samples were observed using XRD and scanning SEM. The results showed that the addition of 1.5% CN could promote cement hydration and enhance slurry densification, thereby increasing the compressive strength, ultrasonic pulse velocity, and electrical resistivity of the slurry, and positively affecting the early freezing resistance of the slurry. However, when the CN dosage exceeded 1.5%, the internal structure of the slurry was loose and porous due to the generation of a large amount of nitrite–AFm, which negatively affects the properties of the cement paste. In addition, the effectiveness of CN is only limited to temperature environments above −6 °C. Concrete antifreeze suitable for lower temperatures still requires further research.

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Section: Ultrasonic Pulse Velocitymentioning

confidence: 99%

The Effects of Calcium Nitrite on the Mechanical Properties and Microstructure of Early-Age Frozen Cement Paste

Wan,

Yu,

et al. 2024

Materials

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“…Nanofibers and nanotubes have been used as additives in cementitious composites and have been shown to increase mechanical properties [22][23][24][25][26]. However, due to a lack of interfacial regions between the nanoparticles and the cementitious materials, these carbon compounds were unable to achieve a complete bonding with cementitious materials [27].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Concrete and Mortar Properties and Durability Using Pristine Graphene Particles

et al. 2022

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The usage of industrially generated graphene was explored in this work, with an emphasis on dosage effects on durability, as well as the mechanical and microstructural properties of both concrete and mortar (0%, 0.1%, and 0.2% in concrete and 0%, 0.07%, and 0.15% in mortar). Based on the mix design for wastewater infrastructure, the results showed that adding graphene to both concrete and mortar enhanced 28-day compressive strength by 10–20%, with the best admixture level being 0.02–0.1%. Graphene reduced the AVPV of mortar by 11.7%, and concrete by 19.3% at the optimal dosages, likely by reducing the number or size of pores in the paste. The 0.2% and 0.15% graphene reinforced concrete and mortar showed significant sulfate resistance, by reducing 62% and 60% of extension respectively, after exposure to a sulfate solution for 16 weeks.

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Application of graphene-based materials in developing sustainable infrastructure: An overview

Badiei

Samsudin

Mohammad

et al. 2022

Composites Part B: Engineering

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Comparative evaluation of the effectiveness of PTFE nanoparticles on cement pastes properties with multi-wall carbon nanotubes, graphene oxide and silver nanoparticles

Cited by 7 publications

References 56 publications

The Effects of Calcium Nitrite on the Mechanical Properties and Microstructure of Early-Age Frozen Cement Paste

The Effects of Calcium Nitrite on the Mechanical Properties and Microstructure of Early-Age Frozen Cement Paste

Enhancing Concrete and Mortar Properties and Durability Using Pristine Graphene Particles

Application of graphene-based materials in developing sustainable infrastructure: An overview

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