摘要(英) |
Concrete pavement provides higher stability, durability, and needs less maintenance. However, it takes more technical skills on designing and operation. In Taiwan, the technical skills are adopted a little later, so, a little while after the Second North Freeway opened, some civilians questioned the smoothness of Concrete pavement. The maintenance worker also found the height difference between faults of the pavements, which affects the comfort of driving and threatens the safety of high-speed driving.
This research discusses how to improve the safety and smoothness of Concrete pavement. First, the proper timing of operation of Diamond Grinding of Concrete pavement in other countries was examined in detail. Second, the author introduces Diamond Grinding according the actual situation of operation. There are tests on the surface smoothness and the safety of friction before and after Diamond Grinding. The results show that the using of Fine Milling can modify the smoothness and friction of CP. FM can be used on both Concrete and Flexible pavements. It is also an economical way of road maintenance. In Taiwan, the smoothness of Concrete pavement can be improved by Fine Milling . The results show that there is a reduction of IRI from about 4.0m/km to 2.0m/km or lower, thus effectively raises the smoothness of Concrete pavement . The grinding concrete surface with a longitudinal corduroy texture. Macro-Texture depth of 0.76mm will get more than 40 SN under the whole-size Lock-wheel mode.
Diamond Grinding is an important factor of Concrete pavement maintenance. Although it improves the function of the pavement, Diamond Grinding can secure the smoothness and friction of the whole section after the completion of maintenance of Concrete pavement . Finally, this research suggests that after Diamond Grinding , long-term strength of the texture and friction should be observed to secure the durability of the effectiveness of Diamond Grinding . |
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