Cao Yangsen, Li Jiarong, Liu Zhuangzhuang, Li Xinzhou, Zhang Fan, Shan Baozeng
School of Highway, Chang'an University, Xi'an 710064, China.
Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, South 2nd Ring Road Middle Section, Xi'an 710064, China.
Polymers (Basel). 2022 Sep 2;14(17):3651. doi: 10.3390/polym14173651.
Sprinkled snow melting salt (SMS) exerts a snow melting effect and also has a negative impact on the asphalt pavement and the environment. Salt storage pavement technology can alleviate these two problems. However, non-alkaline SMSs may have the risk of affecting asphalt mastic properties and further affecting the mechanical properties of asphalt pavements. Therefore, the general properties and rheological properties of two styrene-butadiene-styrene-modified asphalts with and without high elastic polymer were studied after adding SMS. The asphalt mastic without a high elastic agent is defined as the SBS group, and the other group is the HEA group. Our results show that the HEA group shows a lower penetration and a higher softening point, ductility, and viscosity than the SBS group. The more the SMS, the more the reduction effect of the general performance. The elastic recovery of asphalt mastic decreases with the content of SMS. SMS has no obvious effect on the ratio of the viscous and elastic composition of asphalt mastic. The creep of asphalt mastic increases with the content of SMS. The high elastic polymer can significantly reduce the creep, and even the strain of HEA100 is smaller than that of SBS00. SMS increases the creep stiffness and reduces the creep rate at low temperature. Although SMS increases the potential of asphalt pavement to melt ice and snow, it also reduces the high-temperature rutting resistance and low-temperature crack resistance of asphalt mastic. Salt storage pavement materials can be used in combination with high elastic polymers to reduce the negative effects brought by SMSs.
撒布型融雪盐（SMS）具有融雪效果，但对沥青路面和环境也有负面影响。储盐路面技术可以缓解这两个问题。然而，非碱性SMS可能存在影响沥青胶浆性能进而影响沥青路面力学性能的风险。因此，研究了添加SMS后两种有无高弹性聚合物的苯乙烯-丁二烯-苯乙烯改性沥青的常规性能和流变性能。未添加高弹性剂的沥青胶浆定义为SBS组，另一组为HEA组。结果表明，与SBS组相比，HEA组的针入度较低，软化点、延度和粘度较高。SMS添加量越多，对常规性能的降低作用越大。沥青胶浆的弹性恢复率随SMS含量的增加而降低。SMS对沥青胶浆的粘性和弹性成分比例无明显影响。沥青胶浆的蠕变随SMS含量的增加而增大。高弹性聚合物可显著降低蠕变，甚至HEA100的应变小于SBS00。SMS在低温下增加蠕变劲度并降低蠕变速率。虽然SMS增加了沥青路面融冰雪的潜力，但也降低了沥青胶浆的高温抗车辙性能和低温抗裂性能。储盐路面材料可与高弹性聚合物联合使用，以减少SMS带来的负面影响。
