| 环氧树脂基自发光路面材料设计与性能研究 |
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| 引用本文： | 蒋玮,白灵强,周博,吴旺杰,沙爱民.环氧树脂基自发光路面材料设计与性能研究[J].中国公路学报,2022,35(7):67-77. |
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| 作者姓名： | 蒋玮 白灵强 周博 吴旺杰 沙爱民 |
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| 作者单位： | 长安大学 特殊地区公路工程教育部重点实验室, 陕西 西安 710064 |
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| 基金项目： | 国家重点研发计划项目(2018YFB1600200);国家自然科学基金优秀青年科学基金项目(52122809)；国家自然科学基金重点项目(52038001) |
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| 摘 要： | 路面的夜间能见度是影响行车安全性的关键因素，开发应用具有自蓄能自发光特征的新型发光路面材料对提升路面功能与行车安全性具有重要意义。通过引入SrAl2O4:Eu2+,Dy3+铝酸盐基长余辉材料,并以具有透光效果的环氧树脂作为胶结料设计了一种超薄磨耗层形式的环氧树脂基自发光路面材料，根据拉伸强度与断裂伸长率明确了胶结料各组分的最佳配比，基于抗折强度与空隙率确定了混合料中胶结料的最佳用量,并设计了6种不同长余辉材料掺量的混合料，测试了室内与室外不同光环境下的自发光路面材料的余辉特性并评价了其路用性能和长期耐久性能。研究结果表明：环氧树脂结合料各组分的最佳配比(质量比)为环氧树脂∶增韧剂∶固化剂=1∶0.11∶0.17，且混合料中其最佳用量为9%；自发光混合料的余辉衰减存在前期的快速降低和后期的相对稳定2个发展阶段，并且长余辉材料掺量与余辉亮度存在线性关系，此外粒径较大的长余辉材料更有利于混合料的余辉效果；不同激发条件仅对自发光混合料的初始发光效果有明显影响，经过快速衰减阶段后不同激发条件的自发光混合料亮度趋于稳定且一致；环氧树脂基自发光材料具有优异的高温稳定性能、低温抗裂性能和表面抗滑性能，并且紫外老化对其力学性能影响十分有限；较长时间(7~21 d)的浸水会降低自发光混合料的发光效果，但发光效果不会随着浸水时间的继续增加而持续降低，这是由于环氧树脂包裹长余辉材料而隔绝了水分，证明了环氧树脂基自发光混合料具有良好的耐久性能。
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| 关 键 词： | 道路工程 自发光路面 耐久性能 环氧树脂基胶结料 材料设计 余辉特征 |
| 收稿时间： | 2022-01-12 |
Design and Properties of Epoxy-based Self-luminous Road Materials |
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| JIANG Wei,BAI Ling-qiang,ZHOU Bo,WU Wang-jie,SHA Ai-min.Design and Properties of Epoxy-based Self-luminous Road Materials[J].China Journal of Highway and Transport,2022,35(7):67-77. |
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| Authors: | JIANG Wei BAI Ling-qiang ZHOU Bo WU Wang-jie SHA Ai-min |
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| Affiliation: | Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an 710064, Shaanxi, China |
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| Abstract: | The visibility of pavement at night is the key factor affecting driving safety. The development and application of new pavement materials with self-luminous characteristics are of great significance to improve the function and driving safety of the pavement. By introducing SrAl2O4:Eu2+, Dy3+ aluminate-based long-afterglow material and using transparent epoxy resin as epoxy, an epoxy-based self-luminous pavement material in the form of ultra-thin wearing course was designed. The optimal ratio of each component of epoxy was determined according to tensile strength and breaking elongation and the optimal content of epoxy in the mixture was determined based on the flexural strength and porosity, and six mixtures with different long-afterglow content were prepared. The afterglow characteristics of self-luminous pavement materials were tested under different light irradiation conditions, as well as the road performance and long-term durability was evaluated. The results show that the optimum ratio (mass ratio) of each component of epoxy-based binder is epoxy resin∶flexibilizer∶curing agent = 1∶0.11∶0.17, and the optimum dosage in the mixture is 9%. The afterglow attenuation of self-luminous mixtures has two development stages: rapid reduction stage and relative stability stage, and there is a linear relationship between the content of long-afterglow materials and afterglow brightness. In addition, the long-afterglow materials with large particle sizes are more conducive to the afterglow effect of mixtures. Different irradiation conditions only have a significant effect on the initial luminous effect of the self-luminous mixture, the luminance of the mixture under different excitation conditions tends to be stable and consistent after a rapid attenuation stage. Epoxy-based self-luminous materials have excellent high-temperature performance, low-temperature crack resistance, and anti-skid resistance, as well as the effect of UV aging on their mechanical properties is very limited. Long-term immersion (7-21 d) reduces the luminous effect, but it cannot continue to decrease with the continual increase of immersion time. This is because the epoxy-based binder wraps the long-afterglow material and isolates the water, which also proves that the epoxy-based self-luminous mixture has satisfactory durability. |
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| Keywords: | road engineering self-luminous road durability epoxy-based binder material design afterglow characteristic |
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