Expanded Perlite Reinforced Magnesium Phosphate Cement-Based Fireproof Coating: Composition Optimization, Fire Resistance and High-Temperature Phase Evolution Mechanism.
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| Title: | Expanded Perlite Reinforced Magnesium Phosphate Cement-Based Fireproof Coating: Composition Optimization, Fire Resistance and High-Temperature Phase Evolution Mechanism. |
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| Authors: | Liu, Runqing1 (AUTHOR), Wang, Chunyu2 (AUTHOR), Ling, Yuxin3 (AUTHOR) 15965008701@163.com |
| Source: | Materials (1996-1944). Apr2026, Vol. 19 Issue 8, p1492. 31p. |
| Subjects: | Fire resistant materials, Magnesium phosphate, Thermal barrier coatings, Mechanical behavior of materials, Thermal insulation, Perlite, Phase transitions |
| Abstract: | To develop a high-performance inorganic fireproof coating suitable for steel structures, this study utilized magnesium phosphate cement (MPC) as the matrix and introduced expanded perlite (EP) as a lightweight aggregate. The effects of EP content (40–55%) and magnesium-to-phosphorus ratio (M/P = 4:1–7:1) on the dry density, compressive strength, bond strength, and fire resistance of the coating were systematically investigated. X-ray diffraction (XRD), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA) were employed to reveal the phase evolution and microstructure evolution mechanisms at high temperatures. The results indicate that increasing EP content significantly reduces the dry density and thermal conductivity of the coating, enhancing thermal insulation performance. However, excessive incorporation leads to the deterioration of mechanical properties, with an optimal EP content of 45%. The M/P ratio influences the interfacial bond strength and high-temperature structural stability by regulating the proportion of the hydration product K-struvite (KMgPO4·6H2O) and residual MgO. Compressive strength peaked at M/P = 6:1 (0.80 MPa), while bond strength was optimal at M/P = 5:1 (0.097 MPa), corresponding to the best fire resistance (back-side temperature of 180.4 °C). At high temperatures, K-struvite dehydrates and transforms into anhydrous KMgPO4, which, together with residual MgO and crystallized SiO2 from EP, forms a dense ceramic skeleton, ensuring the structural integrity of the coating. Comprehensive performance evaluation determined the optimal mix ratio as M/P = 5:1 and EP content = 45%. The coating with this ratio exhibits a dry density of approximately 560 kg/m3, a 14-day compressive strength of 0.53 MPa, a bond strength of 0.097 MPa, and a back-side temperature of 180.4 °C under flame exposure, demonstrating a favorable balance of lightweight character, mechanical integrity, and thermal insulation performance suitable for steel structure fire protection applications. [ABSTRACT FROM AUTHOR] |
| Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 193436161 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Expanded Perlite Reinforced Magnesium Phosphate Cement-Based Fireproof Coating: Composition Optimization, Fire Resistance and High-Temperature Phase Evolution Mechanism. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Liu%2C+Runqing%22">Liu, Runqing</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Chunyu%22">Wang, Chunyu</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ling%2C+Yuxin%22">Ling, Yuxin</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> 15965008701@163.com</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Materials+%281996-1944%29%22">Materials (1996-1944)</searchLink>. Apr2026, Vol. 19 Issue 8, p1492. 31p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Fire+resistant+materials%22">Fire resistant materials</searchLink><br /><searchLink fieldCode="DE" term="%22Magnesium+phosphate%22">Magnesium phosphate</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+barrier+coatings%22">Thermal barrier coatings</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+behavior+of+materials%22">Mechanical behavior of materials</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+insulation%22">Thermal insulation</searchLink><br /><searchLink fieldCode="DE" term="%22Perlite%22">Perlite</searchLink><br /><searchLink fieldCode="DE" term="%22Phase+transitions%22">Phase transitions</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: To develop a high-performance inorganic fireproof coating suitable for steel structures, this study utilized magnesium phosphate cement (MPC) as the matrix and introduced expanded perlite (EP) as a lightweight aggregate. The effects of EP content (40–55%) and magnesium-to-phosphorus ratio (M/P = 4:1–7:1) on the dry density, compressive strength, bond strength, and fire resistance of the coating were systematically investigated. X-ray diffraction (XRD), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA) were employed to reveal the phase evolution and microstructure evolution mechanisms at high temperatures. The results indicate that increasing EP content significantly reduces the dry density and thermal conductivity of the coating, enhancing thermal insulation performance. However, excessive incorporation leads to the deterioration of mechanical properties, with an optimal EP content of 45%. The M/P ratio influences the interfacial bond strength and high-temperature structural stability by regulating the proportion of the hydration product K-struvite (KMgPO4·6H2O) and residual MgO. Compressive strength peaked at M/P = 6:1 (0.80 MPa), while bond strength was optimal at M/P = 5:1 (0.097 MPa), corresponding to the best fire resistance (back-side temperature of 180.4 °C). At high temperatures, K-struvite dehydrates and transforms into anhydrous KMgPO4, which, together with residual MgO and crystallized SiO2 from EP, forms a dense ceramic skeleton, ensuring the structural integrity of the coating. Comprehensive performance evaluation determined the optimal mix ratio as M/P = 5:1 and EP content = 45%. The coating with this ratio exhibits a dry density of approximately 560 kg/m3, a 14-day compressive strength of 0.53 MPa, a bond strength of 0.097 MPa, and a back-side temperature of 180.4 °C under flame exposure, demonstrating a favorable balance of lightweight character, mechanical integrity, and thermal insulation performance suitable for steel structure fire protection applications. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/ma19081492 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 31 StartPage: 1492 Subjects: – SubjectFull: Fire resistant materials Type: general – SubjectFull: Magnesium phosphate Type: general – SubjectFull: Thermal barrier coatings Type: general – SubjectFull: Mechanical behavior of materials Type: general – SubjectFull: Thermal insulation Type: general – SubjectFull: Perlite Type: general – SubjectFull: Phase transitions Type: general Titles: – TitleFull: Expanded Perlite Reinforced Magnesium Phosphate Cement-Based Fireproof Coating: Composition Optimization, Fire Resistance and High-Temperature Phase Evolution Mechanism. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Liu, Runqing – PersonEntity: Name: NameFull: Wang, Chunyu – PersonEntity: Name: NameFull: Ling, Yuxin IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 04 Text: Apr2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 19961944 Numbering: – Type: volume Value: 19 – Type: issue Value: 8 Titles: – TitleFull: Materials (1996-1944) Type: main |
| ResultId | 1 |
