Abstract: The SMA-13-Common mixture was obtained with SBS modified asphalt. At the same time, two kinds of sustained- release anti-icing and anti-snow materials, which were imported Verglimit and domestically produced Changzhou Lvxin (Lvxin for short) with the dosage 5% of the mass of the mineral material, were added to obtain the asphalt mixtures called SMA- 13-Verglimit and SMA-13-Lvxin. Through ice-breaking test and salt-dissolving conductivity test, and self-created tearing test and conductivity test at different layers, properties of the short-term ice melting, the long-term anti-icing effect and the effectiveness in the depths of the earth of both SMA-13-Verglimit and SMA-13-Lvxin were analyzed and compared. The test results show that the dynamic stability DS, residual stability MS0, splitting strength ratio TSR and low temperature failure strain ε of SMA-13-Lvxin meets the technical requirements. There is a water film on the joint between the ice layer and SMA-13-Lvxin at -5 ℃ and -10 ℃. The bond between ice layer and SMA-13-Lvxin is reduced by 60%. The effective days of anti-ice and anti-snow of SMA-13-Lvxin increased by 25% compared with SMA-13-Verglimit. At the depth of 3~4 cm from the road surface, the two kinds sustained-release anti-icing and anti-snow materials can continuously migrate from the interior to the pavement surface. The research shows that the SMA-13-Lvxin not only has good comprehensive road performance, but also has good anti-ice and anti-snow performance. Compared with SMA-13-Verglimit, SMA-13-Lvxin has a longer service life, but a worse short-term melting performance.

Key words: highway engineering, asphalt mixture, sustained-release anti-icing and anti-snow materials, ice-breaking test, tearing test, conductivity test

摘要： 采用SBS改性沥青配制沥青混合料“SMA-13-普通”，同时分别掺入矿料质量5%的进口Verglimit及国产常州履信缓释型防冰雪材料（ 简称“履信”），配制得到“SMA-13-Verglimit”及“SMA-13-履信”；通过破冰试验、盐分溶析电导率试验，及自创的撕裂试验和不同层 位电导率试验，对比分析了“SMA-13-Verglimit”及“SMA-13-履信”的短期融冰、长期防冰效果及深层位的有效性。试验结果表 明：“SMA-13-履信”的动稳定度DS、残留稳定度MS0、劈裂强度比TSR和低温破坏应变ε均满足技术要求；-5、-10 ℃条件下，冰层 与“SMA-13-履信”的结合面有明显水膜产生，黏结力降低60%；“SMA-13-履信”的防冰雪有效天数较“SMA-13-Verglimit”提高25%；路面 深度3～4 cm深层位处，“履信”“Verglimit”均能持续从内部迁移到路表面。研究表明： “SMA-13-履信”不仅具有良好的综合路用性能 ，而且具有较好的防冰雪性能；“SMA-13-履信”的使用寿命比“SMA-13-Verglimit”长，但短期融冰效果不及“SMA-13-Verglimit”。

关键词: 道路工程, 沥青混合料, 缓释型防冰雪材料, 破冰试验, 撕裂试验, 电导率试验