Preparation and characterization of low flammable asphalt for tunnel pavements

Sheng, Yanping; Ahmed, Abdulakeem Temitope; Jia, Haichuan; Wu, Yali; Ping, Guo; Li, Yan; Qiao, Yunyan

doi:10.1016/j.conbuildmat.2022.129559

Cited by 12 publications

(4 citation statements)

References 32 publications

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“…It can be seen from the infrared spectrum that there are strong absorption peaks at 2919 and 2875 cm −1 , which are, respectively, attributed to the asymmetric and symmetric stretching vibration absorption peaks of CH 2 , while 1455 cm −1 is the bending vibration absorption peak of CH 2 . At 719 cm −1 , it is (CH 2 ) n  ( n ≥ 4) plane rocking vibration absorption peak 16,17 . These peaks are characteristic peaks of HDPE.…”

Section: Resultsmentioning

confidence: 99%

“…At 719 cm À1 , it is (CH 2 ) n (n ≥ 4) plane rocking vibration absorption peak. 16,17 These peaks are characteristic peaks of HDPE. The addition of MHPA makes new characteristic peaks appear in HDPE/MHPA, especially in 1675 cm À1 (O H bending vibration), 1062 cm À1 (P O tensile vibration) and 970 cm À1 (P O C tensile vibration), which indicates that new groups are formed after the reaction of MHPA and PA.…”

Section: Characterization Of Mhpamentioning

confidence: 99%

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Development of bio‐based magnesium phosphate flame retardant for simultaneously improved flame retardancy, smoke suppression and mechanical properties of HDPE

Feng

Wang

et al. 2023

J of Applied Polymer Sci

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In this article, MHPA, a novel bio-based flame retardant, was prepared by a reaction of magnesium hydroxide (MH) and phytic acid (PA). Then, MHPA was added into high-density polyethylene (HDPE) to prepare flame-retardant HDPE composite. This work aims to add MHPA into HDPE to flame-retardant HDPE composites by melt blending to significantly reduce the smoke and toxic gases produced during combustion. The limiting oxygen index (LOI) and cone calorimeter test (CCT) results show that the flame retardancy and smoke suppression of HDPE can be improved by the mixture of MHPA and MH. The LOI of HDPE/MHPA/MH was 26.3%, and its peak heat release rate (pHRR), total heat release (THR) and total smoke production (TSP) values decreased by 38.6%, 27.3%, and 65.2%, respectively, compared with pure HDPE. In addition, HDPE/ MHPA/MH composites have significant tensile strength, elongation breaking strength, and tear strength because of the interface compatibility of bio-based MHPA. Therefore, this study verified that the flame retardancy, smoke suppression, and mechanical properties of HDPE composites could be effectively improved when MHPA and MH are added to HDPE simultaneously.

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Section: Resultsmentioning

confidence: 99%

Section: Characterization Of Mhpamentioning

confidence: 99%

Development of bio‐based magnesium phosphate flame retardant for simultaneously improved flame retardancy, smoke suppression and mechanical properties of HDPE

Feng

Wang

et al. 2023

J of Applied Polymer Sci

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“…It would always do harm to the environment and individuals. Inorganic metal hydroxide flame retardants, mainly presented as ATH, , MH, , HL, − and ATP, are gaining increasing popularity. A large quantity of vapor produced from the decomposition of the inorganic hydroxide during the combustion process would interfere with the heat transfer process from the flame to the condensed phase of the polymer.…”

Section: Introductionmentioning

confidence: 99%

Effect of Compounded Aluminum Hydroxide Flame Retardants on the Flammability and Smoke Suppression Performance of Asphalt Binders

Zhu,

Yang,

Lin

et al. 2024

ACS Omega

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Compounded aluminum hydroxide (ATH) flame retardants have been widely used for their low cost and environmentally friendly characteristics. However, previous research lacks a systematic and comprehensive comparison. In addition, the combustion characteristics and phase characterization of asphalt binders are not taken into account either. In this work, flame retardants, for instance, APP, Sb 2 O 3 , ZB, and LDHs, were compounded with ATH. The flame retardant behavior, together with the smoke suppression behavior, of asphalt binders with compounded flame retardants was determined by LOI and CCT. Furthermore, mechanisms on flame retardants were investigated. It was found that ATH compounded with ZB significantly reduced the heat smoke release and suppressed the formation of toxic volatiles during asphalt combustion. This was because ATH/ZB facilitated the formation of polyaromatic structures and improved the resistance of the char layer. ATH compounded with APP showed an antagonistic effect in the limiting oxygen test because the reaction between ATH and APP inhibited and delayed the decomposition of ATH during asphalt combustion with more aluminum phosphate presenting relatively poor barrier properties produced.

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“…12 Intumescent retardants exhibit poor compatibility due to their unique flame-retardant mechanism in asphalt, resulting in deteriorated rheological properties of asphalt. 28,29 Research on nanocomposite flame retardants has gained attention due to their synergistic effects with other retardants. Halogen-free flame retardants represent a development trend in flame retardant systems: Joulaei et al synthesized magnesium ferrite nanoparticles from extracts of fruits such as oranges and grapefruits, creating nontoxic and highly efficient polymer flame retardants.…”

Section: Introductionmentioning

confidence: 99%

Study on fire resistance and mechanical properties of modified recycled waste oyster powder in asphalt binder

Ren,

Deng,

L.V.

et al. 2024

J of Applied Polymer Sci

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In this study, an eco‐friendly approach is presented for the innovative use of waste oyster shell (OS) powder modified with zinc stannate, aliphatic alcohols, and silane coupling agents blended with styrene‐butadiene‐styrene (SBS) modified asphalt to make a flame‐retardant binder (modified oyster shell [MOS]/styrene‐butadiene‐styrene [SBS]/MA), which is rendered flame retardant and smoke suppressive. Compared with the original SBS/MA, MOS/SBS/MA with a 2% addition rate showed a 35.44% increase in ultimate oxygen index, a 30.62% reduction in peak exotherm, a 10.87% reduction in smoke density, and a 75% reduction in volatile organic compound (VOC) emissions. It also has excellent mechanical properties, with increases in composite modulus, elastic modulus, and storage modulus of 68.58%, 97.29%, and 59.59%, respectively, at 46°C. The thermal stability of MOS/SBS/MA is also improved, with a decomposition temperature 26°C higher than that of SBS/MA. Pavement performance tests show that the water‐soaked Marshall's split strength has increased by 3.87% and the coefficient of rutting by 3.51%. Increased by 3.51%, this method effectively utilizes the waste OS, improves the fire‐retardant properties of asphalt while retaining the mechanical properties of the modified asphalt binder, and provides a model for developing sustainable fire‐retardant asphalt in coastal areas.

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Preparation and characterization of low flammable asphalt for tunnel pavements

Cited by 12 publications

References 32 publications

Development of bio‐based magnesium phosphate flame retardant for simultaneously improved flame retardancy, smoke suppression and mechanical properties of HDPE

Development of bio‐based magnesium phosphate flame retardant for simultaneously improved flame retardancy, smoke suppression and mechanical properties of HDPE

Effect of Compounded Aluminum Hydroxide Flame Retardants on the Flammability and Smoke Suppression Performance of Asphalt Binders

Study on fire resistance and mechanical properties of modified recycled waste oyster powder in asphalt binder

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