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首页> 外文会议>Fourth European Symposium on Performance of Bituminous and Hydraulic Materials in Pavements, Apr 11-12, 2002, Nottingham, United Kingdom >Clogging of porous bituminous surfacings: an investigation in Copenhagen
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Clogging of porous bituminous surfacings: an investigation in Copenhagen

机译：多孔沥青铺面的堵塞：哥本哈根的一项调查

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In 1999, four research sections were constructed in Oester Soegade in Copenhagen, Denmark, to investigate the performance of porous bituminous surfacings in practice. Three of the research sections were surfaced with a double layer porous asphalt surfacing, and a fourth reference section was surfaced with a conventional dense Asphalt Concrete surfacing. The objective of the study was to investigate the durability of double layer porous bituminous surfacings under Danish weather conditions and to measure the variations in the noise levels during the lifetime of the surfacings. This paper describes the investigations made of the permeabilities and the void distributions for the three porous asphalt test sections and their comparison with the noise level measurements made along all four test sections. Permeability measurements were carried out using the Beckers tube method and noise level measurements applied the "Statistical Pass-By Method" (ISO 11819-1: 1997). The test sections were constructed in August 1999 and permeability and noise level measurements were made in September of the same year. In addition, permeability was measured before and after every flushing operation on the porous bituminous surfacings. A strict programme of flushing of the surfacing was followed, with flushing carried out in November/December and April/May of every year. Noise level measurements were carried out on all sections in June/July 2000 and again in the same months in 2001. For one of the test sections, additional noise measurements were also made in November 2000. In connection with construction of the test sections in 1999, in addition to conventional bituminous mixture tests, a number of cores were taken for preparation of Plane and Thin sections. These investigations, together with the results from regular permeability measurements, gave an indication of the mechanism and rate of clogging of the voids in the surfacings. The Thin sections also provided useful information about the condition of the surfacings, for example, whether stripping of the binder was beginning to occur. The results from the permeability and noise level measurements show that some form of relationship exists between them. However, it was not possible to identify any definite effect from the flushing operations, as no significant difference could be detected between permeability measurements made before and after flushing. As anticipated, the Thin section investigations from the cores extracted after more than one year's traffic, showed that clogging occurred in the top 10―25 mm of the surfacings.
机译：1999年，在丹麦哥本哈根的Oester Soegade建立了四个研究部门，以研究实践中多孔沥青铺面的性能。其中三个研究区域均采用双层多孔沥青铺面，而第四参考区域则采用常规的致密沥青混凝土铺面。研究的目的是研究双层多孔沥青铺面在丹麦天气条件下的耐久性，并测量铺面寿命期间噪声水平的变化。本文介绍了对三个多孔沥青测试段的渗透率和空隙分布的研究，以及它们与沿四个测试段进行的噪声水平测量的比较。使用贝克尔管法进行渗透率测量，并且使用“统计通过法”（ISO 11819-1：1997）进行噪声水平测量。测试段建于1999年8月，同年9月进行了磁导率和噪声水平的测量。另外，在每次冲洗操作之前和之后，在多孔沥青表面上测量渗透率。遵循严格的表面冲洗程序，每年的11月/ 12月和4月/ 5月进行冲洗。在2000年6月/ 7月对所有部分进行了噪声级测量，在2001年的同一个月又进行了一次噪声级测量。对于其中一个测试部分，还在2000年11月进行了另外的噪声测量。与1999年测试部分的建设有关除常规的沥青混合料测试外，还采用了许多岩心来制备平面和薄层。这些研究以及常规渗透率测量的结果表明了表层空隙的堵塞机理和发生率。薄部分还提供了有关铺面状况的有用信息，例如，是否开始发生粘结剂的剥离。渗透率和噪声水平测量的结果表明它们之间存在某种形式的关系。但是，由于冲洗前后渗透率的测量值之间没有明显差异，因此无法确定冲洗操作是否有明显效果。正如预期的那样，从经过一年多的流量后抽取的岩心进行的薄断面调查显示，堵塞发生在铺面的顶部10至25 mm。

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