论文总字数：31075字

摘 要

本文着眼于沥青路面二次坑槽破坏的修复与延缓，首先调查沥青路面破坏的基本形式：裂缝与坑槽，从其破坏机理及修复方法中获得启示。调查发现，由于坑槽二次破坏与裂缝破坏类型相似，只是破坏界面间的材料由同种材料变为异种材料，因此本文从裂缝破坏的修复中，尤其是热熔胶与贴缝带相结合的修复方式，通过对比提出利用土工布材料通过环氧沥青粘结剂在破坏界面进行铺设防止或延缓再次破坏产生的方法。通过对此类土工布材料的研究，发现聚丙烯无纺布具备此项条件，因此着手研究其在道路路面使用可行性及修复效果。

本文从坑槽二次破坏形成机理出发：首先了解坑槽二次破坏的形成机理，结合其破坏原因和简易的拉应力力学分析从理论上证实无纺布材料添加后的可使用性；再选择合适的沥青混合料以及沥青粘结剂，确保选中的材料适用于此实验；然后通过调查选择合适的无纺布材料，验证其在沥青路面坑槽二次修复中的可行性；最后制作特定的小梁试件以满足实验要求进行实验，完成小梁试件的弯曲抗裂实验及弯曲疲劳实验。在实验中验证了特定修复试件比普通修复试件在各方面的优异性，例如强度增加173%，位移量增加68.7%，抗弯拉强度增加141.9%。而贴有无纺布的实验组与没有无纺布的实验组在小梁常温抗裂实验中比较后从裂缝断口、抗弯拉应变、断裂能等方面综合说明了无纺布在抗裂性能方面发挥了一定的作用。再从贴有无纺布的实验组与没有无纺布的实验组在小梁弯曲疲劳实验中的数据比较后发现其在抗疲劳性能方面效果显著，证明了无纺布在这两项指标上与修复延缓的积极正相关，从而证实无纺布在路面修复上的实用性。

关键词：沥青路面 坑槽破坏 二次修复 抗裂性能 抗疲劳性能

ABSTRACT

This paper focuses on the second road repair of damaged and delay. Firstly, this paper studied the basic form of the pavement damage: cracks and pits, from their failure mechanism and repair method to gain enlightenment。Because of the similar type of the secondary damage and crack, except for the destruction interface between materials by the same kind of material to dissimilar materials, We thought of a unique experiment from the crack failure of the restoration of the, especially with hot melt adhesive mount joint repair mode with a combination of thus expect an organic material through the asphalt binder in the destruction of the interface of laying to prevent or delay again to destroy generation methods. Through the research of this kind of geotechnical cloth material, the author found that polypropylene non-woven fabric has the condition and started to study its anti-crack performance and fatigue performance in road pavement.

This paper studies from the secondary damage formation mechanism, asphalt binder, pavement materials gradation selection and the non-woven repair effect evaluation of the performance indicators ; firstly the author needs to understand the formation mechanism of the second destruction and combine with the failure reason theoretically confirmed after the addition of nonwoven materials being used; then the author started from the perspective of the asphalt binder, on its basic properties such as viscosity, tensile strength and elongation of the fracture rate, data analysis, to ensure that selected asphalt binders can be used for this experiment; finally the author created specific small beam specimens to meet our experiments require inspection, small beam specimens of flexural and cracking experiment and bending fatigue test. In the experiment, we verified that the specific repair specimens are superior in all aspects, for example, the strength increase of 173%, the displacement quantity increase by 68.7%, and the flexural tensile strength increased by 141.9%. And adhered to a non-woven fabric of the 4 experimental groups and not non-woven fabrics of the 3 experimental groups in trabecular at room temperature cracking experiment comparison from the crack fracture and flexural tensile strain and fracture energy comprehensive description of the non-woven fabrics in the anti-cracking performance playing a certain role. Then from the adhered to a non-woven fabric of No. 2 experimental group and no non-woven No. 1 in the experimental group in the trabecular bending fatigue test data comparison found that the anti-fatigue performance significantly. It is proved that the non-woven fabric is positively correlated with the repair delay on the two indexes, which proves the practicability of the non-woven fabrics in pavement repair.

Key Words: Asphalt pavement Pits failure Second repair Crack resistance Fatigue resistance

目录

摘要 4

ABSTRACT 5

第一章 绪论 8

1.1 研究背景 8

1.2 研究意义 8

1.3 国内外研究现状 8

1.3.1二次破坏病害综述研究 9

1.3.2裂缝破坏修复方法研究 9

1.4 研究内容 12

1.4.1研究内容 12

1.4.2技术路线 12

第二章 沥青路面沥青路面坑槽二次破坏综述及修复方案确定 13

2.1 坑槽二次破坏病理综述 13

2.2沥青路面二次坑槽破坏力学分析 13

2.3 沥青路面二次坑槽破坏修复方案 14

2.4 本章小结 16

第三章 原材料性能及修复方法的协同性能研究 17

3.1沥青混合料 17

3.1.1 SMA-13基本性能 17

3.1.2 EA-10基本性能 20

3.2 沥青粘结剂 23

3.3修复材料的可行性评价 23

3.3.1实验方法 23

3.3.2实验结果分析 24

3.4 本章小结 24

第四章 无纺布材料在修复中的效果评价 25

4.1 材料准备 25

4.1.1 实验修复小梁制备方法 25

4.1.2 实验组与对照组的制备方法 26

4.2 小梁弯曲抗裂性能实验 27

4.2.1小梁弯曲实验步骤 27

4.2.2实验数据分析 28

4.2.3小梁弯曲试件实验小结 33

4.3 小梁弯曲疲劳试验 33

4.3.1加载控制模式 33

4.3.2荷载的波形与频率 34

4.3.3应力比的选择与峰值、静态荷载的确定 34

4.3.4实验方法 34

4.3.5实验数据分析 35

4.3.6疲劳破坏实验小结 35

4.4 本章小结 36

第五章 结论与展望 37

5.1 主要结论 37

5.2 研究与展望 37

致谢 39

参考文献 40

第一章 绪论

1.1 研究背景

路面坑槽破坏是沥青路面最重要的病害形式之一，近年来由于我国道路建设迅速，规模也达到顶峰时期并且在一定时间内也会持续发展，但由于建设起步晚，技术力量不够，导致在大面积铺筑路面的同时也产生了大面积的道路破坏问题。其中最主要的破坏形式即为坑槽破坏附带其二次及多次破坏。

国内外对沥青路面的修补主要采用热拌和冷补两种修补沥青混合料，而这两种不同工艺下的修补技术由于环境、气候、施工技术不到位等因素都会产生二次坑槽破坏^[1]。在上述修复坑槽技术下，其修复技术中都存在严重的二次破坏甚至多次破坏的问题，由于水破坏，修复边界不稳定，新旧材料结合度不高，材料性能差异较大等因素，坑槽边界产生裂缝进而发生二次破坏，其原因主要是边界的应力达到应力强度极限^[2-4]。

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