Effects of Aluminum Hydroxide and Layered Double Hydroxide on Asphalt Fire Resistance

When a fire occurs in a tunnel, the instantaneous high temperature and smoke cause great danger to people. Therefore, the asphalt pavement material in the tunnel must have sufficient fire resistance. In this study, the effects of aluminum hydroxide and layered double hydroxide on the fire resistance of styrene-butadiene-styrene (SBS) polymer-modified asphalt was investigated. The fire resistance of the asphalt was evaluated by using a limiting oxygen index (LOI). The impact of aluminum hydroxide (ATH), layered double hydroxide (LDHs), and mixed flame retardant (MFR) on LOI was studied. The synergistic fire resistance mechanism of ATH and LDHs in asphalt binder was analyzed by using an integrated thermal analyzer‒mass spectrometry combined system (TG-DSC-MS) and Fourier transform infrared spectrometer (FTIR). The experimental results indicated that the main active temperature range of these flame retardants was 221–483 °C. The main components of smoke were methane, hydroxyl, water, carbon monoxide, aldehyde, carbon dioxide, etc. The addition of flame retardants could inhibit the production of methane, carbon monoxide, and aldehyde. Moreover, due to the good synergistic effects of ATH and LDHs, 20 wt % MFR had the best fire resistance.

[1]  Ke Wu,et al.  An experimental investigation of flame retardant mechanism of hydrated lime in asphalt mastics , 2016 .

[2]  Shaopeng Wu,et al.  Microfluidic Synthesis of Ca-Alginate Microcapsules for Self-Healing of Bituminous Binder , 2018, Materials.

[3]  Ding Ding,et al.  The flame retardancy and smoke suppression effect of a hybrid containing CuMoO4 modified reduced graphene oxide/layered double hydroxide on epoxy resin. , 2018, Journal of hazardous materials.

[4]  Seyed Hassan Jafari,et al.  Novel nanocomposites consisting of a semi-crystalline polyamide and Mg–Al LDH: Morphology, thermal properties and flame retardancy , 2014 .

[5]  Henglong Zhang,et al.  Flame Retardants in Bitumens and Nanocomposites , 2015 .

[6]  Sheng Zhang,et al.  Intercalation of phosphotungstic acid into layered double hydroxides by reconstruction method and its application in intumescent flame retardant poly (lactic acid) composites , 2018 .

[7]  Tao Xu,et al.  Combustion properties of saturates, aromatics, resins, and asphaltenes in asphalt binder , 2017 .

[8]  S. Levchik,et al.  A Review of Recent Progress in Phosphorus-based Flame Retardants , 2006 .

[9]  T. R. Hull,et al.  Fire Retardancy of Polymers: New Strategies and Mechanisms , 2008 .

[10]  Giovanna Bochicchio,et al.  Effect of nanoclay and conventional flame retardants on asphalt mixtures fire reaction , 2013 .

[11]  Shaopeng Wu,et al.  Flammability and rheological behavior of mixed flame retardant modified asphalt binders , 2008 .

[12]  Tao Xu,et al.  A TG-FTIR investigation into smoke suppression mechanism of magnesium hydroxide in asphalt combustion process , 2010 .

[13]  Tao Xu,et al.  Physicochemical and pyrolysis properties of SARA fractions separated from asphalt binder , 2015, Journal of Thermal Analysis and Calorimetry.

[14]  Xiaoming Huang,et al.  Study on combustion mechanism of asphalt binder by using TG-FTIR technique , 2010 .

[15]  Yue Xiao,et al.  Inhibiting effect of Layered Double Hydroxides on the emissions of volatile organic compounds from bituminous materials , 2015 .

[16]  Tao Xu,et al.  Combustion mechanism of four components separated from asphalt binder , 2017 .

[17]  Shaopeng Wu,et al.  Laboratory investigation of the properties of asphalt and its mixtures modified with flame retardant , 2008 .

[18]  Sherif Elbasuney.  Surface engineering of layered double hydroxide (LDH) nanoparticles for polymer flame retardancy , 2015 .

[19]  J. Breu,et al.  Applying the flame retardant LDH as a Trojan horse for molecular flame retardants , 2015 .

[20]  Jiu-peng Zhang,et al.  Flame-retarding effects and combustion properties of asphalt binder blended with organo montmorillonite and alumina trihydrate , 2014 .

[21]  Xiaoming Huang,et al.  Inhibitory action of flame retardant on the dynamic evolution of asphalt pyrolysis volatiles , 2013 .

[22]  Liyi Shi,et al.  Phosphorus-containing flame retardant modified layered double hydroxides and their applications on polylactide film with good transparency. , 2015, Journal of colloid and interface science.

[23]  Bingliang Zhang,et al.  The flame retardancy and smoke suppression effect of heptaheptamolybdate modified reduced graphene oxide/layered double hydroxide hybrids on polyurethane elastomer , 2016 .

[24]  Lin Xi-xiong.  Research on Fire-Retarded Open-Graded Friction Course Used in Road Tunnel , 2005 .

[25]  Shaopeng Wu,et al.  Experimental investigation of related properties of asphalt binders containing various flame retardants , 2006 .

[26]  C. Karacan,et al.  Behavior and effect of SARA fractions of oil during combustion , 2000 .