双层SMA钢桥面铺装Eliminator防水粘结体系中粘结材料的开发与性能研究

发布时间：2018-04-09 22:24

本文选题：SMA钢桥面铺装　切入点：粘结材料　出处：《重庆交通大学》2014年硕士论文

【摘要】：双层SMA铺装体系具有高温抗车辙能力强、施工控制容易、建设成本低等优点,在钢桥面铺装中有较多的应用。然而双层SMA铺装体系在部分工程实践中出现了不少的病害,包括层间脱层、推移、纵向裂缝、坑槽等,其中脱层、推移是最致命的病害,主要原因是粘结体系出现问题。Eliminator是一种甲基丙烯酸树脂类防水粘结材料,相较于过往使用的高粘改性沥青和环氧树脂,它具有防水性能好、与钢板粘接力强、耐高温等特点,广泛用于钢桥面铺装,特别是浇筑式铺装体系中。然而,应用于双层SMA钢桥面铺装工程中,容易导致由于Eliminator与SMA间的粘结材料抗剪强度不足铺装层出现推移、脱层等病害。为有效解决由于Eliminator与SMA间的粘结材料自身抗剪强度不足而引起的铺装病害,本文主要研究了热熔性和反应性两类粘结材料,在材料配方调整及优化、粘结材料性能检测、组合试件性能评价等方面展开深入研究,利用剪切试验和拉拔试验来测试粘结材料在铺装体系中的剪切强度和拉拔强度,并参照浇筑式铺装体系中铺装层与Eliminator间的剪切强度和拉拔强度值,对满足力学强度要求的材料进行综合性能评价,最终开发出满足工程使用要求的高性能粘结材料。研究结果表明：在热熔性粘结材料中,(岩沥青+矿粉改性高粘沥青)能够满足基本的力学强度和施工和易性要求,用sasobit和古马隆树脂对该材料进行优化时发现,两者都能改善材料的施工和易性,且sasobit能提高材料的高温抗剪强度,而古马隆树脂会降低高温抗剪强度。在反应性材料中,日本环氧粘结剂、高温固化的环氧树脂粘结剂(记作GW粘结剂)和二阶段固化的环氧粘结剂(记作ED粘结剂)三种材料在最佳配比和用量下,力学强度较高,尤其是GW粘结剂和ED粘结剂。最后对满足力学强度的粘结材料进行低温柔韧性、高温稳定性、耐酸耐碱性、水稳定性等性能检验,经综合比较分析,推荐选择ED粘结剂作为Eliminator防水层与改性沥青SMA铺装层间的粘结材料。
[Abstract]:Double layer SMA pavement system has many advantages such as high temperature rutting resistance, easy construction control and low construction cost. It has many applications in steel bridge deck pavement.However, there are many diseases in some engineering practices of double-layer SMA pavement system, including interlayer delamination, movement, longitudinal cracks, potholes and so on, among which delamination is the most fatal disease.The main reason is that the adhesive system has problems. Eliminator is a kind of methacrylic resin waterproof adhesive material. Compared with the high viscosity modified asphalt and epoxy resin used in the past, Eliminator has good waterproof performance, strong adhesion to steel plate, high temperature resistance and so on.Widely used in steel bridge deck pavement, especially in castable paving system.However, in the application of double-layer SMA steel bridge deck pavement, it is easy to cause diseases such as delamination due to the insufficient shear strength of the bonding material between Eliminator and SMA.In order to effectively solve the pavement disease caused by the insufficient shear strength of the bonding material between Eliminator and SMA, this paper mainly studies two kinds of bonding materials: hot melt and reactivity.The shear strength and drawing strength of the bonded material in the pavement system are tested by shear test and drawing test.With reference to the shear strength and drawing strength between the pavement and Eliminator in the pouring paving system, the comprehensive performance evaluation of the materials which meet the requirements of mechanical strength is carried out, and the high performance bond material which meets the requirements of engineering application is developed.The results show that in the hot melt binder (rock bituminous mineral powder modified high viscosity asphalt) can meet the basic requirements of mechanical strength, construction and ease. It is found that the material is optimized by sasobit and Guamaron resin.Both of them can improve the construction and easiness of the material, and sasobit can improve the high temperature shear strength of the material, while the Gumaron resin can reduce the high temperature shear strength.Among the reactive materials, the Japanese epoxy binder, the high-temperature curing epoxy resin binder (GW binder) and the two-stage curing epoxy binder (Ed binder) have higher mechanical strength under the optimum ratio and dosage.Especially GW binder and Ed binder.Finally, the mechanical strength of the adhesive materials for low-temperature flexibility, high-temperature stability, acid and alkali resistance, water stability and other performance tests, through comprehensive comparison and analysis,Ed binder is recommended as the bonding material between Eliminator waterproof layer and modified asphalt SMA pavement.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U444;U443.33

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