辽河减渣为基质沥青的SBS改性沥青储存稳定性

在评价SBS改性沥青储存稳定性的基础上,对国内外已报道的无机物类稳定剂进行了筛选。并研究了无机物类稳定剂对辽河减渣为基质沥青的SBS改性沥青储存稳定性的影响。实验结果表明,使用无机物为稳定剂,改善了基质沥青与聚合物改性剂之间的相溶性,能很好地提高以辽河减渣为基质沥青的改性沥青与SBS改性剂的溶解度,使SBS改性沥青上下层软化点之差在0.2℃左右,远远低于交通部JTJ036-98标准。同时,由于稳定剂的加入,提高SBS改性沥青的储存稳定性,即使在长期储存和运输过程中,改性剂与基质沥青之间也不发生分层、离析现象,有效地克服了目前沥青路面施工中普遍使用的现场拌和法、母液法和预处理等方法所存在的缺点,可以在沥青生产过程中将稳定剂一次性加入,即减少了沥青路面施工成本又减少生产步骤。

Storage Stability of SBS Modified Asphalt Based on Vacuum Distilation Residuum From Liaohe Oil Field

Based on the evaluation of the stotage stability of SBS modified asphalt,the inorganic stabilizers reported in China and oversea were selected.The effect of the inorganic stabilizers on the storage stability of alphalt based on vacuum residuum(from Liaohe oil field).The experimental result shows that the compatibility between base asphalt and SBS has been inproved by the inorganic stabilizer,increasing the solubility of SBS based on the base asphalt.The difference between bottom softness point and up softness point is about 0.2 ℃ that is much less than that standard listed JTJ 36～98.Because of the addition of stabilizer the storige stability of SBS modified asphalt is increased.As a result,the isolation and layer is not profuced between SBS and base asphalt during the storige and transportation for long term in the long period.