Air void assessment in tarmac (AirVoTar)

空隙密度是路面施工质量保证的重要方面。因此，对于新建沥青路面，行业规范要求评估沥青层厚度以及路面面层中的空隙密度。这些测量值需要符合行业标准，如果不符合标准，承建商将面临罚款和返工。目前业内用于评估新建沥青路面质量的方法包括提取岩芯并将其送往实验室。这种方法使承包商能够测量沥青中的沥青层厚度和空隙密度。然而，该方法是侵入性的，破坏性的，昂贵和耗时的。本项目将研究开发一种技术的可能性，该技术将在现场快速、非破坏性地测量沥青中的空隙密度，最好是在路面施工期间。该项目的成功将使NDT咨询公司能够提供一种完整的方法，在现场和非破坏性地测量新建柏油路面的沥青层厚度和空隙含量。

Air void density is an essential aspect of the quality assurance of pavement construction. Therefore, in newly built asphalt pavement the industry specifications require assessment of asphalt layers thicknesses as well as air void density in the pavement surface layer. These measured values need to comply with the industry standards and failure to comply will expose the contractor to fines and re-work.The method currently used in the industry to assess the quality of newly constructed asphalt pavement consists of extracting cores and sending them to the laboratory. This method enables the contractor the measure the asphalt layers thickness and air void density in the asphalt. However, the method is intrusive, destructive, costly and time consuming.This project will look into the possibility of developing a technology that will measure the air void density in asphalt on-site, quickly and non-destructively, preferably during pavement construction. Success of this project will enable NDT Consultants to offer a complete method that will measure both the asphalt layers thicknesses and air void content in newly built tarmac onsite and non-destructively.