【作者】 李家庆；

【导师】 李宇峙；

【作者基本信息】 长沙理工大学 ， 道路与铁道工程， 2007， 硕士

【摘要】 近十年来,随着交通事业的迅猛发展,我国大跨径钢桥建设高潮迭起,许多大跨径钢桥相继建成并已经投入到运营中。钢结构桥具有板厚较薄,恒载小的优点,在大跨径桥梁以及架桥条件困难等情况下被广泛采用。钢桥面铺装尤其是大跨径正交异性钢桥面板的铺装技术,在国际上一直是一个热点和难点。桥面铺装直接铺设在正交异性钢板上,在行车荷载、风载、温度变化及地震等因素影响下,其受力和变形远较公路路面或机场道面复杂,因而对其强度、变形稳定性、疲劳耐久性等均有更高要求。基于上述背景,论文自主研发一种新型材料—环氧树脂混凝土,并对其各方面性能进行测试,验证其作为超薄面层用于钢桥面铺装的可行性。首先,改性设计原有1号胶,主要是调节固化时间和降低造价,研发出一种新胶,命名为24号胶,此种胶更适合用于拌制环氧树脂混凝土。并对胶粘剂自身性能进行测试,包括密度、拉剪强度、弯曲变形能力、紫外线老化等方面。然后,用24号胶做结合料设计环氧树脂混凝土,配合比设计时充分考虑钢桥面铺装对铺装材料性能的特殊要求,主要是弯曲变形能力和疲劳性能。并对设计出的环氧混凝土进行性能方面测试,包括抗压强度试验、冻融劈裂试验、车辙试验、弯曲试验及疲劳试验,并与沥青混凝土、水泥混凝土对比分析。结果显示:与沥青混凝土相比,环氧混凝土有较好的水稳定性和高温抗车辙能力;与水泥混凝土相比,环氧混凝土有较好的弯曲变形能力和疲劳性能。以应变控制方式进行疲劳试验,回归出环氧树脂混凝土的疲劳方程,可以对环氧混凝土进行疲劳寿命预估。最后,通过对环氧树脂混凝土施工工艺的研究,定出此种材料特有的施工工艺流程。更多还原

【Abstract】 With the rapidly development of transportation business in the last ten years,the construction of long span steel bridge is very quickly.A great many of long span steel bridges have been built one after another and putted into use.The steel structure bridge has the advantages of thinner plank,smaller permanent load,so it is adopted extensively in long span bridge and when it is difficult to build.The technique of pavement on steel bridge deck,especially on the long span orthotropic steel bridge deck, is a difficult problem and a hot topic in the world.The bridge deck paves on the orthotropic steel bridge deck directly,with the effect of drive load,wind load,temperature varying and earthquake,it is complex to compare with road pavement or airport pavement in the aspects of mechanical property and deformation property.As a result,it has a higher requirement in the intensity character,deformation stability,fatigue durability.According to the above-mentioned background,the thesis developed independently a new kind of material,named Epoxy resin concrete,and tested all aspects functions in order to testify that it’s feasible to use it as ultrathin surface on the pavement of steel bridge deck.Firstly,basing on NO.1 glue,we have invented a new glue,named NO.24 glue,by regulating the curing time and reducing the cost,which is suitable to mix Epoxy resin concrete.Then,tested the glue’s performance,including density,tension shear strength, bending deformability,ultraviolet aging and so on.Secondly,NO.24 glue was used to design Epoxy resin concrete as a binder.When doing proportion design,special demands for pavement material such as bending deformability and fatigue property must to be considered sufficiently.Carried out tests to detect the designed Epoxy resin concrete, including compression strength experiment, freezing and thawing split test,rutting experiment,bending experiment and fatigue experiment,and then compared with the Asphalt concrete,cement concrete.The results show that Epoxy resin concrete has better water-stability and anti-rutting under high temperature compared with Asphalt concrete,it has better bending deformability and fatigue property compared with cement concrete.The fatigue equation of Epoxy resin concrete was regressed by fatigue experiment which was controlled in strain.The fatigue equation could be used for fatigue life prediction.Lastly,this kind of material’s special construction technology procedure had been ascertained by the studying of Epoxy resin concrete’s construction technology.更多还原