EC130温拌剂对SBS改性沥青高温性能及抗疲劳性能的影响

Effect of EC130 warm-mix additive on high temperature performance and fatigue resistance of SBS modified asphalt

作为制备沸石发泡沥青的发泡剂,EC130温拌剂释放的发泡水和残留的沸石矿物对沥青的性能有着不同的影响.为研究EC130温拌剂对SBS改性沥青高温性能和抗疲劳性能的影响,采用石灰岩矿粉、EC130沸石矿物和EC130温拌剂等3种添加物,设计了以添加物掺量为变量的单因素试验.以石灰岩矿粉为参照对象,通过温度扫描试验、多重应力蠕变恢复试验和线性振幅扫描试验,分析了EC130沸石矿物和EC130温拌剂释放的发泡水对SBS改性沥青高温性能和抗疲劳性能的影响.结果表明:同石灰岩矿粉一样,沸石发泡沥青中的EC130沸石矿物使沥青弹性增大、黏性减小,有利于抗车辙性能的提升,但不利于抗疲劳性能;沸石发泡沥青中的发泡水使其黏性增大、弹性减小,有利于抗疲劳性能的提升,但不利于抗车辙性能.

As foaming agent for the preparation of zeolite-foamed asphalt,the foaming water released from EC130 warm-mix additive and the residual zeolite minerals have different effects on the properties of asphalt.To investigate the effect of EC130 warm-mix additive on the high temperature performance and fatigue resistance of SBS modified asphalt,three additives of limestone powder,EC130 zeolite mineral and EC130 warm-mix additive were used,and the single-factor test was designed with additive dosage as variable.By temperature scan test,multiple stress creep recovery test and linear amplitude sweep test,the effects of EC130 zeolite mineral and foaming water released from EC130 warm-mix additive on the high temperature performance and fatigue resistance of SBS modified asphalt were compared and analyzed with reference to the effect of limestone powder on asphalt properties.The results show that like limestone mineral powder,the EC130 zeolite mineral in zeolite foamed asphalt can increase the elasticity and decrease the viscosity,which is favorable for rutting resistance but unfavorable for fatigue resistance.The foaming water in zeolite foamed asphalt can increase the viscosity and decrease the elasticity,which is favorable for fatigue resistance but unfavorable for rutting resistance.