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首页> 外文期刊>Romanian Journal of Transport Infrastructure >Experimental Modelling of Asphaltic Layers Behaviour at Reflective Fracture from Degraded Pavements – Parametric Studies
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Experimental Modelling of Asphaltic Layers Behaviour at Reflective Fracture from Degraded Pavements – Parametric Studies

机译：退化路面反射裂缝上沥青层行为的实验模型–参数研究

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摘要

Due to the pavement degradation in time, rehabilitation measures need to be adopted, maintaining the costs as lower as it can. One of the solutions often utilized is to apply a layer of asphalt concrete over the degraded pavement. The main issue of this method is that the fractures which exists in the old pavement are transmitted in the asphaltic overlay (reflective fracture). By adopting the optimal solution for the overlay, from the fracture’s behavior perspective, the maintenance/rehabilitation costs are considerably reduced. This is why experimental laboratory studies are needed to be conducted. They are cheaper and are less time-consuming than the experimental field studies. The fracture parameters were measured in the laboratory: the opening and length of the overlay fracture, opening of the existing pavement fracture, the specimen deformation, time (number of cycles). The interpretation of this parameters can give us an image of the way the fracture is transmitted from the old pavement to the asphaltic overlay and then it propagates trough the entire overlay thickness. This is the way the asphaltic mixture recipe that best behaves to this type of fracture can be established, avoiding an inadequate mixture design which involves higher maintenance costs.
机译：由于人行道及时老化，需要采取修复措施，并尽可能降低成本。经常使用的解决方案之一是在退化的路面上铺一层沥青混凝土。该方法的主要问题是旧路面中存在的裂缝通过沥青覆盖层传播（反射裂缝）。从骨折的行为角度来看，通过采用覆盖层的最佳解决方案，可以显着降低维护/修复成本。这就是为什么需要进行实验性实验室研究的原因。与实验现场研究相比，它们更便宜且耗时更少。在实验室中测量断裂参数：覆盖层断裂的开口和长度，现有路面断裂的开口，试样变形，时间（循环次数）。对这些参数的解释可以使我们了解到裂缝是如何从旧路面传播到沥青覆盖层，然后通过整个覆盖层厚度传播的。这样可以建立起对此类裂缝表现最佳的沥青混合料配方，从而避免混合料设计不充分而导致维护成本较高的问题。

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