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美国公路陶瓷路标的应用

作者:金沙js55555官网涂远芳 发布时间:2017/3/7 下午4:06:36 查看次数:7261

世界各国公路路面标线长期采用油漆标线,随着行车速度的提高和车辆的日益增多,加之日晒雨淋、车辆擦蚀,油漆标线常常较快脱落失去效用,致使行车安全受到影响。鉴于此,美国率先开发出陶瓷路标用以替代或辅助油漆标线。美国加州、内华达州无论是水泥路面或沥青路面,也无论是高级公路抑或城区道路均已大量使用瓷标,现将陶瓷路标有关情况简要介绍如下。

1.瓷标的形状、大小、颜色和种类

美国用的瓷标多为圆形,其顶部呈球形,直径为10cm,使用不同的拼接可获得不同的宽度效果。颜色有白色(用于车道分隔)、黄色(用于禁越)。此外还有反光型(夜间车灯照射时标示明显)、非反光型之分。

2.瓷标的物理性能

1)上釉表面的顶、边釉层厚均不得少于1.3mm

2)釉面不允许褪色、细裂纹, 剥落亦不允许存在;

3)吸水率不得大于最初净重的1%

4)冷热温差从-40100℃无开裂;

5)抗压强度为10.34MPa

3.瓷标的铺设

1)铺设标准

美国加州交通厅规定:道路分隔线单个瓷标间距离为1 m , 4个瓷标中有1个为反光型,弯道另有用瓷标铺砌之箭头指示。

2)铺设方法

美国采用表面粘贴法,使用专门研制之环氧型或沥青型强力粘结剂,将瓷标压贴在路面划线上,方法简便易行,其与路面之粘附力达3.45MPa

3)铺设机械

美国铺设施工早已机械化。施工步骤为:划线定位喷洒粘结剂压放瓷标。作业机械有大型一体化的(装于一台汽车上),也有功能分散的小型单人操作的机械(带小动力)。

 

美国使用瓷标标线其总成本多少不清楚,但仅以瓷标使用寿命远高于油漆标线来推算,例如10年,毫无疑问,其经济效益远高于油漆标线.

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