Waste glass recycling in magnesium phosphate coatings for the fire protection of steel structures

Cirstea, Nicoleta Florentina; Bădănoiu, Alina; Voicu, Georgeta; Nicoară, Adrian-Ionuţ

doi:10.1016/j.jobe.2023.107345

Cited by 5 publications

(2 citation statements)

References 33 publications

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“…With the superiority of high strength, excellent toughness, and a short construction period, steel structures have been regarded as the nucleus of modern buildings, bridges, vessels, and other industrial equipment. − Nevertheless, the potential collapse of structural steel will occur when exposed to high temperatures and fire situations, which can critically jeopardize the security of people and property. − In this situation, many researchers have paid more and more attention to improving the fire protection ability of structural steel by introducing flame-retarding coatings. , To our knowledge, graphene materials with 2D lamellar structure have exhibited a high specific surface area and chemical inertness, which has the potential to be applied in the field of functional coatings. − Consequently, owing to the high thermal stability of graphene and the blocking function of the specific layered structure, it has furnished a platform for fabricating fireproof coatings. , Chen et al have combined graphene oxide with carbon nanotubes (CNTs) modified by polydopamine (PDA) and 3-aminopropyltriethoxysilane (KH550), named GO@M-CNTs, to obtain waterborne epoxy fireproof coatings . The results of large plate combustion tests have revealed that the GO@M-CNTs 1.5% /EP composite coatings exhibit the lowest backboard temperature (168.2 °C) and possess the maximum expansion height (13.7 mm) and expansion rate (10.79%).…”

Section: Introductionmentioning

confidence: 99%

One-Step Spraying Strategy for Fabricating Bioinspired, Graphene-Based, and Multifunctional-Integrated Coatings on Structural Steel with Good Water Repellency, Fireproofing, Anticorrosion, and Durability

Tang,

Gao,

et al. 2024

Langmuir

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Traditionally, many coatings were merely concentrated on settling the inherent fire protection problem of steel structures, while surface contamination and corrosion susceptibility should also be considered. Concurrently addressing these problems in fireproof efficiency and surface multifunctionality has become an issue of great significance in further expanding the application value in industrial and daily scenarios. Based on this condition, ecofriendly, graphene-based, and superhydrophobic coatings with multifunctional integration were constructed on steel via a one-step spraying method. The as-prepared coatings mainly consist of epoxy resin (EP), silicone resin (SR), a cyclodextrin-based flame retardant (MCDPM), expandable graphite (EG), and multilayered graphene (MG). The results demonstrate that the water contact angle (WCA) and water sliding angle (WSA) of asprepared coatings can reach 156.8 ± 1.6 and 5.8 ± 0.7°, respectively, revealing good water repellency and self-cleaning properties. The coatings can also exhibit adequate adaptability for various substrates including wood, polyurethane foam, and cotton fabrics. Besides, good durability and robustness of coatings have been also verified via acid/alkali immersion, outdoor exposure, O 2 /plasma etching, and linear abrasion tests. Simultaneously, the coatings can exhibit excellent anticorrosion capacity for steel materials via a double barrier effect. Most importantly, the coatings have exhibited the lowest backside temperature (234.5 °C) during fire impact tests, suggesting excellent fireproof and heat insulation performance. This fact can be ascribed to the conjunct action between the physical/chemical charring process of flame retardants and the remarkable thermal stability of graphene. Consequently, this article can be expected to further promote the development and application of multifunctional-integrated coatings for steel structures in more fields.

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Section: Introductionmentioning

confidence: 99%

One-Step Spraying Strategy for Fabricating Bioinspired, Graphene-Based, and Multifunctional-Integrated Coatings on Structural Steel with Good Water Repellency, Fireproofing, Anticorrosion, and Durability

Tang,

Gao,

et al. 2024

Langmuir

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“…Magnesium phosphate cement (MPC) has excellent properties such as rapid hardening, early strength, and good adhesion. It is used widely in bioceramics [1][2][3][4], engineering quick fixes [5][6][7], solidification of harmful substances [8,9], protective coatings [10,11], and in the 3D printing [12] field. MPC is mainly composed of dead burnt MgO and soluble phosphate.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Hydration Degree of Magnesium Potassium Phosphate Cement Modified by Sintered Silt Ash

Zhang,

Yang,

Luo

et al. 2023

Materials

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The effective utilization rate of river-dredged silt was extremely low, and common disposal methods such as dumping it into the ocean have already threatened the ecological environment. To demonstrate that dredged silt can be used as a mineral admixture to modify magnesium potassium phosphate cement (MKPC), the mechanical properties and hydration degree of sintered silt ash (SSA)-blended MKPC in the early stage of hydration were studied systematically in this paper, with MKPC as the reference group. The mechanical experiment results showed that in the process of increasing the SSA content to 25%, the compressive strength first increased and then decreased. Among the samples, the compressive strength of cement aged by 1d and 3d with 15% content was the highest, which increased by 11.5% and 17.2%, respectively, compared with the reference group. The setting time experiment found that with the increase in SSA content, the hydration reaction rate of MKPC slowed down significantly. Its effect of delaying hydration was most obvious when the SSA content was 10–15%. The X-ray diffraction pattern showed that there was no large amount of new crystalline substances formed in the hydration product. The results obtained by scanning electron microscopy show that the microstructure tended to be denser and the hydration products tended to be plump when the SSA content was in the range of 0–15%. The non-contact electrical resistivity experiment showed that the addition of SSA delayed the early hydration of MKPC. Combined with the above experiment results, it was found that when the content of SSA was less than 15%, it not only delayed the early hydration of MKPC, but also deepened its hydration degree.

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Research progress on the setting time and solidification mechanism of magnesium phosphate cement: A review

Meng,

Jiang,

Chen

et al. 2023

Construction and Building Materials

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Waste glass recycling in magnesium phosphate coatings for the fire protection of steel structures

Cited by 5 publications

References 33 publications

One-Step Spraying Strategy for Fabricating Bioinspired, Graphene-Based, and Multifunctional-Integrated Coatings on Structural Steel with Good Water Repellency, Fireproofing, Anticorrosion, and Durability

One-Step Spraying Strategy for Fabricating Bioinspired, Graphene-Based, and Multifunctional-Integrated Coatings on Structural Steel with Good Water Repellency, Fireproofing, Anticorrosion, and Durability

Mechanical Properties and Hydration Degree of Magnesium Potassium Phosphate Cement Modified by Sintered Silt Ash

Research progress on the setting time and solidification mechanism of magnesium phosphate cement: A review

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