抗剥落剂对SBS改性沥青热储存稳定性影响

采用了沥青针入度、软化点、延度指标和粘度以及聚合改性沥青的离析实验对掺入ASA-9304、morlife300和AM-6525这3种抗剥落剂的SBS改性沥青的热储存稳定性能进行评价。抗剥落剂掺量为沥青质量的0.3%。实验结果表明:掺入ASA-930、morlife300和AM-6525这3种抗剥落剂对SBS改性沥青的3大指标有一定的影响,由粘度试验得到的粘温曲线选取的4种沥青的拌和与压实的温度均相同,分别为176℃与165℃,3种抗剥落剂对SBS改性沥青的粘度无影响。聚合物改性沥青离析实验结果表明:掺入3种抗剥落剂后SBS改性沥青与原样改性沥青的软化点差都在2℃以内,满足规范规定的不大于2.5℃的要求,说明掺入的3种抗剥落剂对SBS改性沥青的热储存稳定性良好。

Investigation of Anti-stripping Additives on Heat Storage Stability of SBS Modified Asphalt

The effect of three types of anti-stripping additives on SBS modified asphalt heat storage stability performance was studied in this paper.Penetration,softening point,ductility and viscosity test were employed to evaluate the performance of samples with and without anti-stripping additives.The content of anti-stripping additives was 0.3% by the weight of asphalt.The results showed that the addition of three types of anti-stripping into SBS modified asphalt had little effect on penetration,softening point,viscosity and ductility of SBS modified asphalt.The mixing and compacting temperatures of samples with and without anti-stripping additives determined on the basis of the temperature-viscosity graph were the same,176 ℃and 165 ℃,respectively.The results of separation of polyer modified asphalt test indicated that the SBS modified asphalt had good separation resistance.