速干型雾封再生材料的合成与应用研究

发布时间：2018-10-26 16:22

【摘要】：沥青混凝土中的沥青受到日照、雨雪、氧化和车轮碾压等因素的影响容易发生老化,老化后的沥青从溶胶型向凝胶型转变,对石料的黏结力逐渐降低。沥青路面的预防性养护技术可以补充老化沥青中流失的组分,大幅延长沥青路面使用寿命。本文研究开发了一种沥青路面速干型雾封层预防性养护材料(Fog Seal Material,FSM),主要针对机场跑道和高架道路等需要快速开放交通的沥青路面提供了解决方案。研究的速干型FSM由再生层和表覆层组成。首先,对再生层使用的再生剂组成进行分析和GPC、~(13)C-NMR和FT-IR表征,通过计算获得了其主要官能团的溶解参数。根据基团贡献法和Hansen溶解度参数理论,筛选对再生剂具备优良溶解性的乙醇和助溶剂助溶剂N体系,通过三元混合相图优化速干型雾封材料再生层的配方,并对所制备的再生层进行性能评价。再生层材料的稳定性优异,固含量差不超过2%,具有良好的速干效果,50A老化沥青渗透再生6h后可达到新沥青水平。其次,对表覆层的沥青成分进行性质改善,考察了不同乳化稳定剂对其乳化产品稳定性的影响,并对表覆层的制备过程进行优化。先后考察了无机稳定剂、有机稳定剂对乳化制备过程的影响,实验结果表明稳定剂G与其他添加剂相比,用量少效果优。优化条件下制备的表覆层乳液五天稳定性良好,上下固含量差小于5%,水相中的油滴平均直径小于10μm。最后,分别对雾封再生层溶液和表覆层乳液进行250kg/h中试放大实验,制备的雾封材料满足JTGE20-2011的标准要求,并先后应用到上海市南北高架汶水路段、闵行区绿莲路段的沥青路面,取得了较好的养护效果。
[Abstract]:The asphalt in asphalt concrete is affected by sunshine, rain and snow, oxidation and wheel rolling, etc. The aging asphalt changes from sol type to gel type, and the adhesion force to stone decreases gradually. The preventive maintenance technology of asphalt pavement can supplement the lost components of aging asphalt and prolong the service life of asphalt pavement. In this paper, a kind of (Fog Seal Material,FSM) is developed, which is a kind of preventive maintenance material for asphalt pavement, which is mainly aimed at the asphalt pavement which needs fast open traffic, such as airport runway and viaduct. The fast dry FSM is composed of regenerated layer and surface layer. Firstly, the composition of regenerator used in the regenerating layer was analyzed and characterized by GPC,~ (13) C-NMR and FT-IR. The dissolution parameters of the main functional groups were obtained by calculation. According to group contribution method and Hansen solubility parameter theory, ethanol and co-solvent N system with good solubility to regenerative agent were screened, and the formula of regenerated layer of quick dry fog sealing material was optimized by ternary mixing phase diagram. The performance of the regenerated layer was evaluated. The regenerated layer material has excellent stability, the difference of solid content is not more than 2, and it has a good quick drying effect. The 50A aging asphalt can reach the new asphalt level after 6 hours of penetration and regeneration. Secondly, the properties of asphalt were improved, the effects of different emulsifying stabilizers on the stability of emulsified products were investigated, and the preparation process of surface coatings was optimized. The effects of inorganic stabilizer and organic stabilizer on the emulsification process were investigated successively. The experimental results showed that stabilizer G had better effect than other additives. The surface coating emulsion prepared under the optimized conditions has a good stability for five days, the difference between upper and lower solid content is less than 5, and the average diameter of oil droplets in water phase is less than 10 渭 m. Finally, a pilot scale up experiment of 250kg/h was carried out on the regenerated solution of fog seal and the surface coating emulsion. The prepared fog sealing materials meet the standard requirements of JTGE20-2011 and have been applied to the Wenshui section of the north and south elevated in Shanghai. The asphalt pavement of green lotus section in Minhang district has achieved good maintenance effect.
【学位授予单位】：华东理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U414

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