沥青混合料水损害的研究现状及发展

 2022-06-21 23:06:43

论文总字数:26374字

摘 要

随着我国经济水平的飞速提高,我国的高速公路建设已然开辟了全新的局面。现今我国高速公路总里程位居世界第一。我国高等级公路多采用半刚性基层沥青路面的结构。但在交通运输建设快速发展的同时,道路交通量越来越大,重载车辆越来越多,沥青路面的病害问题也越来越突出,其中水损害问题尤为严重。

由于沥青混合料的空隙率较大,加之路面防水、排水设计不够合理,水极易进入沥青路面结构层内部。当水分渗入混合料后会减弱沥青与集料之间的粘附性。水会透过沥青在集料表面形成一层水膜,分离沥青与集料之间的接触面,从而导致路面沥青混合料的水损害。目前国内外科研工作者已对水损害的产生机制、影响因素、评估试验方法以及水损害的预防和处治等方面进行了研究。然而影响沥青路面水损害的有关因素错综复杂,迄今仍有许多问题无法解决。

本文根据目前国内外关于沥青水损害的研究成果,对江苏省内S322项目路段的水损害情况进行调查分析,着重从水对沥青与集料之间粘附性的影响的角度,对沥青水损害的产生机制进行研究,并根据水损害的成因进一步提出了提高沥青路面抗水损害能力的方法。

关键词:沥青混合料水损害,粘附性,路面病害

Abstract

With the rapid increase of economic level of China, its highway construction has opened up a completely new situation. At present, the total mileage of highways in China ranks first in the world. Most of the high-grade highways in China use semi-rigid base asphalt pavement structures. However, with the rapid development of transportation construction, the amount of road traffic is increasing, more and more heavy-duty vehicles are being used, and the problem of asphalt pavement is becoming more and more outstanding, among which the water damage problem is particularly serious.

Due to the large voidage of asphalt mixture, combined with the waterproof and drainage design of the road surface being unreasonable, water can easily enter the interior of the asphalt pavement structure. When moisture penetrates into the mixture, the adhesion between the asphalt and the aggregate is weakened. Water will form a film of water on the surface of the aggregate through the asphalt, separating the contact surface between the asphalt and the aggregate, which will lead to water damage to the asphalt mixture on the pavement. At present, domestic and foreign scientific research workers have conducted research on the mechanism of water damage, influencing factors, evaluation test methods, and the prevention and treatment of water damage. However, due to the intricate and complex factors related to water damage on asphalt pavements, many problems have not yet been solved.

Based on the research results of asphalt water damage at home and abroad, this article investigates and analyzes the water damage situation of the S322 project in Jiangsu Province, focusing on the impact of water on the adhesion between asphalt and aggregates, and on asphalt water damage. The mechanism of production was studied, and a method to improve the water damage resistance of asphalt pavement was further proposed based on the causes of water damage.

KEY WORDS:Water damage of asphalt, Adhesion, Pavement disease

目录

摘要 I

Abstract II

第一章 绪论 1

1.1 课题研究的背景和意义 1

1.2 国内外主要研究现状 2

1.2.1 国内研究现状 2

1.2.2 国外研究现状 3

1.3 本文的研究目的及主要研究内容 4

第二章 江苏省沥青路面水损害调查及原因分析 6

2.1 工程介绍 6

2.1.1 气候、气象条件 6

2.1.2 交通量 6

2.1.3 养护历史 8

2.2 路面水损害情况 8

2.3 水损害原因分析 12

第三章 沥青路面水损害的产生机制和影响因素 14

3.1 水损害的产生机制 14

3.1.1 微观机制 14

3.1.2 宏观机制 15

3.2 水损害的影响因素 16

3.2.1 车辆荷载的影响 16

3.2.2 原材料的影响 17

3.2.3 空隙率的影响 17

3.2.4 其他方面的影响 17

第四章 沥青路面水损害的预防措施与处治方法 19

4.1 S322项目水损害处理方案 19

4.1.1 路面方案设计 19

4.1.2 排水设施方案 20

4.2 水损害的预防措施 22

4.2.1 通过改善原材料的性能预防水损害 22

4.2.2 通过改善路面结构预防水损害 23

4.3 水损害的处治方法 25

4.3.1 裂缝修补 25

4.3.2 坑槽修补 26

4.3.3 麻面与松散修补 26

4.3.4 路面修补的建议 26

第五章 结语 28

5.1 结论 28

5.2 进一步研究建议 28

致谢 29

参考文献 30

绪论

课题研究的背景和意义

根据我国国家统计局数据,随着我国经济水平的飞速提高,我国的高速公路建设已然开辟了全新的局面。统计数据显示,我国公路总里程,截至2016年末,已达到469.63万公里,其中高速公路总里程也从1988年的147公里达到了13.1万公里,跃居世界第一。我国近年来高速公路建设的发展情况如图1-1所示。

图1-1 我国高速公路里程图

剩余内容已隐藏,请支付后下载全文,论文总字数:26374字

您需要先支付 80元 才能查看全部内容!立即支付

该课题毕业论文、开题报告、外文翻译、程序设计、图纸设计等资料可联系客服协助查找;