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首页> 外文会议>Annual Symposium on Quantitative Nondestructive Evaluation; 19980719-24; Snowbird,UT(US) >MEASUREMENT OF ASPHALT DENSITY USING MICROWAVES
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MEASUREMENT OF ASPHALT DENSITY USING MICROWAVES

机译：用微波测量沥青密度

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摘要

In a typical paving operation, several parties are involved in producing a quality asphalt pavement (e.g., design mix specifier, hot mix plant operator, QA/QC inspector, asphalt laying operator, and roller compactor operator). However, quite often it is the roller operator's skill that ultimately determines the density of the compacted asphalt mat and therefore the final quality of the pavement. An under-compacted asphalt mat is permeable to air and water which shortens the pavement life. On the other hand, unnecessary roller passages will lead to over-compaction that is associated with insufficient air void content in the asphalt. An over-compacted pavement is susceptible to permanent deformation, leave alone the waste of time and equipment in the compaction process. Hence, it would be highly advantageous if the roller operator is able to continuously monitor the compaction level of asphalt during the paving operation. In view of the lack of a reliable real-time measurement method, the core sampling technique is widely regarded as the standard approach to assessing pavement quality at present time. In addition to its destructive nature, core sampling can only be applied after the paving operation is completed. Therefore, it does not provide the timely information which is essential for the implementation of any in-process correction measure.
机译：在典型的摊铺操作中，生产高质量沥青路面的过程涉及多个方面（例如，设计拌和说明员，热拌设备操作员，QA / QC检查员，沥青铺设操作员和压路机操作员）。但是，通常由压路机操作员的技能最终决定压实的沥青垫层的密度，从而决定路面的最终质量。压实不足的沥青垫层对空气和水具有渗透性，从而缩短了路面寿命。另一方面，不必要的辊道将导致过度压实，这与沥青中的气隙含量不足有关。压实过的路面易于永久变形，在压实过程中不浪费时间和设备。因此，如果辊子操作员能够在摊铺操作期间连续监测沥青的压实程度，那将是非常有利的。鉴于缺乏可靠的实时测量方法，目前，岩心采样技术被广泛认为是评估路面质量的标准方法。除破坏性外，岩心取样只能在摊铺操作完成后进行。因此，它没有提供及时的信息，这对于实施任何过程中的纠正措施至关重要。

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