复合型冷补沥青混合料在道路养护中分析研究

发布时间：2018-01-05 05:40

本文关键词：复合型冷补沥青混合料在道路养护中分析研究　出处：《长沙理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：为了适应我国道路交通的大发展需要,养护工程领域的新材料和新的施工工艺需要更加深入的研究。基质沥青通过乳化剂的作用形成乳化沥青,乳化沥青、水泥与集料在常温下拌合得到水泥乳化沥青混合料,可以用于道路养护修补。同时可以节约能源,减少对环境的污染。水泥保持了乳化沥青混合料常温拌合的特点,同时还将混合料强度形成时间大大缩短,减少了道路修复需要的通车等待时间。工程实际表明,运用到养护修补方面的水泥乳化沥青混合料在新旧路面粘结方面还存在问题。因此,本文提出在水泥乳化沥青混合料中添加耦联剂以解决这个问题。本文在借鉴国内外相关研究的基础上,通过理论与试验相结合的方法对耦联剂-水泥乳化沥青混合料进行系统地研究。首先,对原材料进行筛选,特别是耦联剂的筛选。运用修正后的马歇尔试验方法,通过正交试验方法,分析耦联剂用量、沥青用量及水泥掺量对马歇尔试件早期、后期马歇尔力学指标以及旋转压实成型试件(常温7天养生)的单轴抗压强度的影响。对比马歇尔试验和单轴抗压试验结果,并考虑混合料性能要求和经济性,推荐原材料适宜掺量为:耦联剂水溶液(耦联剂:水=1:3)4%,乳化沥青7-8%,水泥2-3%;各档集料的比例为9.5~19mm:4.75~9.5mm:0~4.75mm=33:38:27:2。然后,通过CT和扫描电镜试验对混合料内部结构进行分析探讨。最后为了验证耦联剂在沥青路面修补中的多种用途,进行了新旧路面之间的层间粘结试验。在实际施工中,为了避免运输工程中的乳化沥青破乳,特别研制了现场搅拌设备。复合型冷补耦联剂—水泥乳化沥青混合料在不降低乳化沥青混合料性能基础上,增强了混合料早期强度,大大缩短了通车时间,加强了新旧路面之间的层间粘结。在养护工程日益重要的今天,本文中所提出的耦联剂—水泥乳化沥青混合料和现场搅拌设备的结论都有较明显的社会效益,值得广泛的推广引用。
[Abstract]:In order to meet the needs of the great development of road traffic in our country, the new materials and new construction technology in the field of maintenance engineering need to be studied more deeply. The matrix asphalt forms emulsified asphalt and emulsified asphalt through the action of emulsifier. Cement and aggregate are mixed at room temperature to obtain cement emulsified asphalt mixture, which can be used for road maintenance and repair, and can save energy at the same time. The cement keeps the characteristic of emulsified asphalt mixture mixing at room temperature and shortens the forming time of the mixture strength greatly. The engineering practice shows that the cement emulsified asphalt mixture used in maintenance and repair still has problems in new and old pavement bonding. This paper puts forward adding coupling agent to cement emulsified asphalt mixture to solve this problem. Through the combination of theory and experiment, the coupling agent-cement emulsified asphalt mixture is studied systematically. Firstly, the raw materials are screened. In particular, the selection of coupling agent. By using the modified Marshall test method, through the orthogonal test method, the amount of coupling agent, asphalt content and cement content in the early phase of Marshall specimen were analyzed. The effect of Marshall mechanical index and uniaxial compressive strength of rotating compaction forming specimen (7 days of health preservation at room temperature). The results of Marshall test and uniaxial compression test were compared, and the performance requirements and economy of mixture were considered. The suitable amount of raw materials is recommended as follows: coupling agent aqueous solution (coupling agent: water 1: 3), emulsified asphalt 7-810, cement 2-3; The ratio of aggregates in different grades is 9.5mm: 4.75mm: 9.75mm: 0 / 4.75mm / 33: 38: 272.Then. The internal structure of the mixture was analyzed and discussed by CT and SEM test. Finally, in order to verify the various uses of coupling agent in asphalt pavement repair. In order to avoid emulsified asphalt demulsification in actual construction, the interlayer bond test between new and old pavement is carried out. In particular, the field mixing equipment is developed. The composite cold coupling agent-cement emulsified asphalt mixture enhances the early strength of the mixture and greatly shortens the opening time on the basis of not reducing the performance of the emulsified asphalt mixture. The bond between the new and the old pavement is strengthened. The conclusion of the coupling agent-cement emulsified asphalt mixture and the field mixing equipment proposed in this paper has obvious social benefits today when the maintenance engineering is becoming more and more important. It is worth popularizing and quoting widely.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414

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