Talk:Self-healing concrete

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Some of the paragraphs seem very long, perhaps they could be broken up to make the article easier to read -- Tmerbex92 (talk) 14:02, 1 July 2022 (UTC)[reply]

To further the above, some of the paragraphs are missing citations Tmerbex92 (talk) 14:13, 1 July 2022 (UTC)[reply]

• Introduction: the section was well written, needed only minor edit, a couple of citation are needed to complete it (I added the citation needed labels).
• Hystory: compact but fine section, minor edit was needed (added the citation needed labels)
• Autogenous healing: section was well written, only minor edit was made (added the citation needed labels)
• Stimulated autogenous healing: the introduction part could be a little bit more intuitive, as it is right now doesn't clearly explaine the subject properly, citation are needed (added the labels). In general the writing is fine.
• Autonomous self-healing: the section is well written, however I think that a couple of references would be needed (added labels)

In general the article is well written and just missing some additional references to be complete Filippo Ghisoni (talk) 14:24, 1 July 2022 (UTC)[reply]

The following observations and suggestions for improvements were collected, following expert review of the article within the Science, Technology, Society and Wikipedia course at the Politecnico di Milano, in June 2022.

Please include a scientific reference instead of a commercial reference for reference 1. --BarettoDiArchitettura (talk) 08:35, 21 July 2022 (UTC)[reply]

Thanks for the suggestion Tmerbex92, Filippo Ghisoni and BarettoDiArchitettura

• I added the citations where it was marked needed.
• I replaced a few copyrighted images (it was already removed by moderators) with new CCC license images.
• Included additional scientific reference for reference 1

Niranjan (talk) 15:38, 5 July 2022 (UTC), updated on 14 July 2022.[reply]

I've removed the following text from the lead, and may add some of the final paragraph back into the article. It's only tangentially related to the article:

Mechanical properties: Carbon Nanotube Reinforced Concrete (CNT-RC) has been shown to have significantly improved mechanical properties compared to traditional cement. Li et al. (2006) demonstrated that the addition of CNTs can increase the compressive strength of cement paste by up to 23% and the flexural strength by up to 45% compared to plain cement paste. Moreover, Szeląg (2017)^[1] reported that the elastic modulus of CNT-RC can be increased by up to 85% compared to plain cement paste. The addition of CNTs can also enhance the fracture toughness and ductility of the cement paste, making it more resistant to cracking. CNT-RC has also been shown to have improved durability and resistance to environmental factors such as freeze-thaw cycles, chloride ion penetration, and sulfate attack. Zhang and Zhou (2014) reported that the addition of CNTs has been reported to reduce the diffusion coefficient of chloride ions in cement paste by up to 60%, indicating improved resistance to chloride-induced corrosion.

Application in subsurface wellbore cementation: The use of CNT-RC in subsurface wellbore cementation has gained significant attention due to its unique properties. A recent study by Hao et al. (2020)^[2] investigated the reinforcement of oil and gas wellbore cements with a methyl methacrylate/carbon-nanotube polymer nanocomposite additive. The study found that the addition of CNTs resulted in improved compressive strength of the cement by up to 37%, and increased flexural strength by up to 22%. This demonstrates the potential of CNT-RC to improve the mechanical properties of wellbore cements, which is crucial for preventing gas and fluid migration and ensuring the long-term integrity of the wellbore.

Healing ability after fires and high temperatures: Another advantage of CNT-RC is its ability to heal after being subjected to fires and high temperatures. A  research by Szeląg (2017) investigated the healing ability of CNT-RC after being subjected to high temperatures. The study found that the addition of CNTs to cement paste improved the thermal stability of the material and allowed for it to maintain its mechanical properties at elevated temperatures up to 800 °C. Additionally, after the material was exposed to high temperatures and subsequently cooled, it still maintained its healing ability and was able to repair any cracks that formed during the thermal loading process (Szeląg, 2017).

31.187.2.233 (talk) 00:22, 16 January 2024 (UTC) 31.187.2.233 (talk) 00:22, 16 January 2024 (UTC)[reply]