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为了确定沥青路面矿物纤维复合阻燃材料(M-FR)中MiberⅢ纤维和复合阻燃剂合适的复配比例,采用极限氧指数法,对比研究MiberⅢ型矿物纤维的阻燃特性,分析其掺量对沥青胶浆极限氧指数(LOI)的影响规律;并研究阻燃剂掺量对沥青LOI和针入度、软化点、延度的影响;进而采用正交试验确定MiberⅢ纤维和阻燃剂合适的复配比例。结果表明:沥青胶浆的LOI随MiberⅢ纤维掺量增加呈“S形”增长趋势,且其掺量宜在10%~15%之间;沥青胶浆的LOI随阻燃剂掺量增加呈线性增长趋势,且阻燃剂对沥青3大指标影响均比较显著,其掺量宜小于8%;在两者适宜的掺量范围内,MiberⅢ型矿物纤维复合阻燃材料(M-FR)中两者合适的复配掺量为15%和6%。此外,利用热重、差示扫描量热试验(TG-DSC)分析了掺矿物纤维复合阻燃材料后沥青胶浆的热重行为。
In order to determine the suitable compounding ratio of MiberⅢ fiber and composite flame retardant in M-FR composite, the limiting oxygen index method was used to compare the flame-retardant properties of MiberⅢ mineral fiber, On the limiting oxygen index (LOI) of asphalt mortar. The influences of the content of flame retardant on the LOI, penetration, softening point and ductility of asphalt were also studied. The orthogonal test was also conducted to determine the appropriateness of MiberⅢ fiber and flame retardant The proportion of the compound. The results showed that the LOI of asphalt mortar increased with the increase of Miber Ⅲ fiber content, and its content should be between 10% and 15%. The LOI of asphalt mortar increased with the content of flame retardant (P <0.05). The results showed that the flame retardant had a significant effect on the three indexes of asphalt, and its content should be less than 8%. In the suitable range of both, MiberⅢ mineral fiber composite flame retardant material (M-FR) In both the appropriate compounding content of 15% and 6%. In addition, thermogravimetry and differential scanning calorimetry (TG-DSC) were used to analyze the thermogravimetric behavior of asphalt cement with mineral fiber composite fire retardant.