| 王朝辉,傅一,陈谦,陈宝,周骊巍.环氧沥青混凝土桥面铺装材料研究与应用进展[J].材料导报,2018,32(17):2992-3009 |
| 环氧沥青混凝土桥面铺装材料研究与应用进展 |
| Application and Research Advances in Epoxy Asphalt Concrete Servingas Deck Pavement Material |
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| DOI：10.11896/j.issn.1005-023X.2018.17.013 |
| 中文关键词: 环氧沥青混凝土 桥面铺装材料 性能评价 |
| 英文关键词: epoxy asphalt concrete, bridge pavement materials, performance evaluation |
| 基金项目:中央高校基本科研业务费专项资金(300102218210)；天津市交通运输科技发展计划项目(2017A-12)；河南省交通运输科技计划项目(2018J8) |
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| 摘要点击次数: 2212 |
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| 中文摘要: |
| 随着桥梁设计理念、结构分析、施工技术等不断更新发展与完善,目前桥梁正逐渐朝着大跨度、高强度、长寿命、高耐久等方向发展,同时,未来桥梁也将面临更复杂的建设环境、更多的功能需求,因此必须加强研发与新型桥梁设计体系相匹配的特种桥面铺装材料。环氧沥青混凝土桥面铺装材料以高强度、耐高温、抗疲劳、抗老化等优异路用性能脱颖而出,逐渐受到关注。 然而,环氧沥青混凝土制备工艺复杂、施工条件严苛、耐久性不足等问题日益凸显,这些缺点使得其在桥面铺装领域的推广受到一定阻碍。为此,研究者们针对如何提升环氧沥青混凝土使用品质及耐久性进行了深入研究并取得了一定成果。这一系列成果先后在大量桥面铺装实体工程中得以应用,良好的使用效果也为环氧沥青混凝土的进一步推广奠定了基础。 环氧沥青混凝土在桥面铺装领域的研究成果可以概括为三个方面:铺装结构组合优化、制备工艺优化、混凝土原材料优化。其中铺装结构组合从早期的单质单层结构逐渐过渡到单质双层、异质双层结构,趋于合理的铺装结构组合使环氧沥青混凝土材料的性能得以充分发挥。制备工艺从热拌法发展到温拌甚至冷拌,在保证环氧沥青混凝土使用性能的同时减少了对环境的污染,并且在一定程度上降低了施工难度。而在原材料应用方面,研究者们不断对双组分环氧沥青与三组分环氧沥青的性能进行对比分析；同时,环氧沥青的改性方式趋于多样化,从单独使用改性沥青发展到同步使用改性环氧树脂,改性剂从纤维发展到高分子聚合物、超支化聚合物等。这些措施不仅改善了沥青与环氧树脂的相容性,也增强了环氧沥青混凝土的相关性能。此外,为使环氧沥青混凝土具有更好的稳定性,在级配优化方面也进行了深入研究。然而目前环氧沥青混凝土的一系列研究成果较为散乱,缺乏对其系统的总结与梳理,且环氧沥青混凝土的性能评价指标及要求仍需深入研究与完善。 为进一步确定环氧沥青混凝土桥面铺装材料科学合理的性能评价指标及要求,本文全面梳理了国内外环氧沥青混凝土相关规范,系统调查了大量实体工程及研究动态,对比分析了不同主要原材料的环氧沥青混凝土对其路用性能的影响,最终推荐了环氧沥青混凝土桥面铺装结构组合、原材料类型、级配范围和性能评价指标及要求,为环氧沥青混凝土桥面铺装材料规范完善与质量控制奠定了基础。 |
| 英文摘要: |
| With the continuous development and improvement of design concept, structural analysis and construction techno-logy, bridges are evolving towards large span, high strength, long life and high endurance at present, and meanwhile, will confront more complicated construction circumstances and more functional requirements. Therefore, the research of specific bridge deck paving materials which match with new bridge design system is indispensable. Epoxy asphalt concrete has come to the fore and drawn wide concern due to its high strength, high-temperature resistance, fatigue resistance, aging resistance and other excellent road performance. However, the increasingly exaggerated issues of epoxy asphalt concrete, such as complex preparation process, harsh construction conditions and unsatisfactory durability, hinder the popularization of epoxy asphalt concrete in bridge deck application. To this end, researchers have made intensive works to improve the workability and durability of epoxy asphalt concrete, and have acquired certain achievements. These achievements have found remarkable application in practical projects, which lays a foundation for the further promotion of epoxy asphalt concrete. The variety of beneficial outcomes for the research of epoxy asphalt concrete serving as dech pavement material can be classified into three aspects:pavement structure optimization, preparation process optimization and raw materials optimization. The combinations of pavement structure have been developed from homogeneous single-layer structure to homogeneous double-layer structure and heterogeneous double-layer structure. The more reasonable combination of pavement structure facilitates to achieve full potential for the performance of epoxy asphalt concrete. As for preparation process, the prevailing of warm mixing and cold mixing over the traditional hot mixing alleviates pollution and fairly reduces construction difficulty, while ensures the serving performance of epoxy asphalt concrete. From the perspective of raw materials, the performance of two-component epoxy asphalt and three-component epoxy asphalt have attained deep comparative investigations. At the same time, modification methods for epoxy asphalt have gotten diversified, as the synergistic use of modified epoxy resin and modified asphalt gradually predominates, and polymer modifiers and hyperbranched polymer modifiers along with the initially adopted fibrous modifiers also have gain noticeable reformation. These advancements result in improved compatibility between asphalt and epoxy resin, and furthermore, impressive enhancement for the perfor-mance of epoxy asphalt concrete. Additionally, for the sake of making epoxy asphalt concrete more stable, the formula optimization has also captured much attention. However, this series of research results of epoxy asphalt concrete are scattered without systematically classifying and analyzing. Moreover, the performance evaluation indexes and requirements of epoxy asphalt concrete need to be further studied and improved. To define a reasonable system of performance evaluation indexes and requirements for epoxy asphalt concrete, this article comprehensively surveys the domestic and international specifications of epoxy asphalt concrete, systematically inspects vast amounts of practical projects and global research trends. It makes a comparative analysis over the effects of various major raw materials on pavement performance of epoxy asphalt concrete, and gives recommendation on bridge deck pavement structure combinations, raw materials, formulas, performance evaluation indexes and requirements. The paper is expected to lay a foundation for specification improvement and quality control of epoxy asphalt concrete. |
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