盐储存沥青混合料性能的实验室研究与现场验证

Cao Yangsen, Li Xinzhou, Liu Zhuangzhuang, Li Jiarong, 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.

Materials (Basel). 2022 Sep 27;15(19):6720. doi: 10.3390/ma15196720.

The traditional method of removing ice and snow on roads carries the risk of damaging roads and the environment. In this circumstance, the technology of salt-storage asphalt pavement has gradually attracted attention. However, snow-melting salts may also have an impact on asphalt mixture performance. To explore the effect of snow-melting salts on the mechanical and surface properties of salt-storage asphalt mixtures (SSAM), SSAMs were prepared with styrene-butadiene-styrene (SBS)-modified asphalt and high-elastic asphalt (HEA) as binders and snow-melting salts as fillers. The influence of the type of asphalt binder and the content of snow-melting salt on the performance of the SSAM was preliminarily investigated through laboratory tests. The results show that the high-temperature, low-temperature, and moisture resistance performance of the SBS group SSAM decreased by 9.8-15.1%, 1.6-12.3%, and 6.3-19.4%, respectively, compared with SBS00. The higher the amount of snow-melting salt, the greater the performance drop. The three mechanical properties of the HEA group containing high-elastic agent TPS are 11.3-19.7%, 4.2-12.3%, and 4.8-13.3% higher than that of the SBS group. Even when the content of snow-melting salt is 50% or 75%, the mechanical properties of the HEA group are better than that of SBS00 without snow-melting salt. Snow-melting salt has clear advantages in improving the anti-skid performance but decreases the anti-spalling performance. The surface properties of the HEA group were also better than that of the SBS group. Considering the mechanical properties and surface properties, the comprehensive performance of the HEA group is better than that of the SBS group, and HEA50 has the best comprehensive performance. In addition, the construction performance of the SSAM has also been verified, and the production of SSAM according to the hot mix asphalt can meet the specification requirements.

传统的道路除冰雪方法存在损坏道路和环境的风险。在这种情况下，蓄盐沥青路面技术逐渐受到关注。然而，融雪盐也可能对沥青混合料性能产生影响。为探究融雪盐对蓄盐沥青混合料（SSAM）力学性能和表面性能的影响，以苯乙烯-丁二烯-苯乙烯（SBS）改性沥青和高弹性沥青（HEA）为结合料、融雪盐为填料制备了SSAM。通过室内试验初步研究了沥青结合料类型和融雪盐含量对SSAM性能的影响。结果表明，与SBS00相比，SBS组SSAM的高温、低温和抗水损害性能分别下降了9.8 - 15.1%、1.6 - 12.3%和6.3 - 19.4%。融雪盐用量越高，性能下降越大。含高弹性剂TPS的HEA组的三项力学性能比SBS组高11.3 - 19.7%、4.2 - 12.3%和4.8 - 13.3%。即使融雪盐含量为50%或75%时，HEA组的力学性能也优于无融雪盐的SBS00。融雪盐在提高抗滑性能方面具有明显优势，但降低了抗剥落性能。HEA组的表面性能也优于SBS组。综合考虑力学性能和表面性能，HEA组的综合性能优于SBS组，且HEA50的综合性能最佳。此外，还验证了SSAM的施工性能，按热拌沥青生产SSAM能满足规范要求。