基于表面能理论的老化温拌SBS改性沥青结合料的粘附性

发布时间：2018-04-20 04:39

本文选题：路面材料 + SBS改性沥青　；参考：《材料导报》2017年16期

【摘要】：在SBS改性沥青中添加Sasobit与Evotherm温拌剂制备得到温拌沥青,对3种SBS改性沥青进行旋转薄膜烘箱老化(RTFOT)与压力老化(PAV),采用接触角法检测了老化前后温拌SBS改性沥青与蒸馏水、甘油和甲酰胺等3种液体的接触角,探讨了短期老化与长期老化对温拌SBS改性沥青接触角的影响。基于表面自由能理论,得到了温拌SBS改性沥青的表面能及其色散分量和极性分量,研究了老化对温拌SBS改性沥青表面能的影响。结果表明:随着老化程度的加强,温拌SBS改性沥青与水的接触角逐渐增大,疏水性变化明显;原样与Evotherm温拌SBS改性沥青的总表面自由能及其分量均随着老化程度的加强呈降低趋势,其在短期老化阶段的表面自由能下降较为严重;经长期老化,Sasobit温拌SBS改性沥青的极性分量有增大趋势。
[Abstract]:Warm mix asphalt was prepared by adding Sasobit and Evotherm warm mixing agent in SBS modified asphalt, and 3 kinds of SBS modified bitumen were aged (RTFOT) and pressure aging (PAV). The contact angle method was used to detect the contact angles of 3 liquids, such as distilled water, distilled water, glycerin and formamide before and after aging, and the short-term aging was discussed. Effect of long-term aging on the contact angle of SBS modified asphalt with warm mixing. Based on the surface free energy theory, the surface energy, dispersion component and polar component of warm mixed SBS modified asphalt were obtained. The effect of aging on the surface energy of warm mixed SBS modified bitumen was studied. The results showed that with the strengthening of aging range, the contact of warm mixed SBS modified bitumen to water The angle gradually increases and the hydrophobicity changes obviously. The total surface free energy and its component of the SBS modified bitumen with Evotherm temperature and its components all decrease with the increase of the aging degree, and the surface free energy decreases more seriously in the short term aging stage, and the polarity component of the SBS modified bitumen with Sasobit warm mixing has a tendency to increase after a long aging.

【作者单位】：兰州交通大学甘肃省道路桥梁与地下工程重点实验室;兰州交通大学道桥工程灾害防治技术国家地方联合工程实验室;甘肃恒达路桥工程集团有限公司甘肃省公路路网监测重点实验室;
【基金】：国家自然科学基金(51408287;51668038) 长江学者和创新团队发展计划滚动资助(IRT_15R29) 甘肃省杰出青年基金(1606RJDA318) 甘肃省自然科学基金(1506RJZA064) 兰州交通大学青年科学基金(2017016)
【分类号】：U414

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