Styrene-butadiene-styrene (SBS) modified asphalt (SMA) has been widely used in road engineering for decade. However, the phase separation of SMA was obvious during the transport and SBS degraded after aging. To resolve these problems, β-cyclodextrin (β-CD) was used to modify SMA in this work. Conventional properties, storage stability, the effect of short-term aging on the morphology, and rheological property for SMA and β-CD/SMA were investigated. The softening point of modified asphalt reached to the maximum of 66.7°C when 1 wt% β-CD was added to SMA, where the penetration had shown the minimum of 80.8 dmm. In addition, the ductility of β-CD/SMA increased to the maximum of 797 mm when the content of β-CD was increased to 5 wt%. Furthermore, incorporation of β-CD improved the storage stability of SMA. Importantly, the aggregation of SBS was observed in β-CD/SMA, but modifiers distributed uniformly after a short-term aging. The rutting resistance and antiaging performances of SMA were also improved by the addition of β-CD. Considering the comprehensive properties of modified asphalt, the optimum content of β-CD was found to be 2 wt%.

中文翻译：

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β-环糊精/SBS改性沥青的制备以提高抗老化性、流变性能和储存稳定性

苯乙烯-丁二烯-苯乙烯 (SBS) 改性沥青 (SMA) 已广泛应用于道路工程十年。然而，在运输过程中 SMA 的相分离很明显，而 SBS 则在老化后降解。为了解决这些问题，在这项工作中使用β-环糊精（β-CD）来修饰SMA。研究了 SMA 和 β-CD/SMA 的常规特性、储存稳定性、短期老化对形态的影响以及流变特性。当 SMA 中加入 1 wt% β-CD 时，改性沥青的软化点最高可达 66.7°C，其中渗透率最低为 80.8 dmm。此外，当 β-CD 的含量增加到 5 wt% 时，β-CD/SMA 的延展性增加到最大值 797 mm。此外，β-CD 的掺入提高了 SMA 的储存稳定性。重要的，在 β-CD/SMA 中观察到 SBS 的聚集，但改性剂在短期老化后分布均匀。β-CD的加入也提高了SMA的抗车辙性能和抗老化性能。考虑到改性沥青的综合性能，β-CD 的最佳含量为 2 wt%。