环氧树脂混凝土在钢桥面铺装中的应用研究
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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。
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.
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。
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.
引文
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[5] 李星星.耐高温环氧树脂胶粘剂的应用研究及环氧树脂混凝土研究:[长沙理工大学硕士论文]. 长沙:长沙理工大学,2007,40～66
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[23] 郝培文,徐金枝等.应用贝雷法进行级配组成设计的关键技术.长安大学学报,2004,Vol.24(6):1～5
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[2] 黄卫,李凇泉.南京长江第二大桥钢桥面铺装技术研究.公路,2001,Vol.37(1):37～39
[3] 李宇峙,吴国平,邵腊庚.环氧沥青混凝土材料在钢桥铺装中的应用.中南公路工程,2005,Vol.30(3):168～172
[4] 秦海兰,朱方之,吴剑.环氧树脂混凝土的研究现状和工程应用.焦作工学院学报(自然科学版),2003,Vol.22(2):109～109
[5] 李星星.耐高温环氧树脂胶粘剂的应用研究及环氧树脂混凝土研究:[长沙理工大学硕士论文]. 长沙:长沙理工大学,2007,40～66
[6] 贺曼罗.环氧树脂胶粘剂.北京:中国石化出版社,2004,5～51
[7] 韩道均,李海鹰,张华.厦门海沧大桥钢桥面铺装的设计与实施.公路,2001,Vol.20(1):6～7
[8] 樊叶华,程刚,王建伟.浇注式沥青混凝土钢桥面铺装施工工艺试验研究.公路,2003,No.12:13～14
[9] 黄卫,钱振东,程刚.环氧沥青混凝土在大跨径钢桥面铺装中的应用.东南大学学报,2002,Vol.32(5):784～785
[10] 王敬民,谭志龙等.浇注式沥青混凝土在钢桥面铺装中的应用.中外公路,2004,Vol.24(3):45～47
[11] 沈金安.改性沥青与 SMA 路面.北京:人民交通出版社,1999,236～269
[12] 吕伟民.钢桥桥面沥青铺装的现状与发展.中外公路,2002,Vol.22(1):7～8
[13] 张力,陈仕周.钢桥面铺装技术的研究与发展.公路,2001,No.1:3～4
[14] 孙曼灵主编.环氧树脂应用原理与技术.北京:机械工业出版社,2002,1～278
[15] 林奇辉. 建筑物加固修复用环氧树脂体系研究:[北京航空航天大学硕士学位论文].北京:北京航空航天大学,2005,10～22
[16] 王超,张斌,李奇力. 室温固化耐热胶粘剂.1999,Vol.20(1):11～13
[17] 孔杰,宁荣昌,白真权等.丙烯酸酯液体橡胶改性环氧树脂胶粘剂的研究.粘接,2002,Vol.23(6),29～31
[18] 沙庆林.SAC 和其他粗集料断级配的矿料级配设计方法.公路,2005,No.1:143～145
[19] 陈爱文,郝培文编译.应用贝雷法设计和检验级配.中外公路,2004, Vol.24(5):101～103
[20] 林绣贤.论 Superpave 组成配比的特色.华东公路,2002,No.1:4～5
[21] 王晓,程刚,黄卫.环氧沥青混凝土性能研究.东南大学学报,2001,Vol.31(6):21～23
[22] 葛折圣,黄晓明.沥青混合料应变疲劳性能的试验研究.交通运输工程学报,2002,Vol.2(1):34～36
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