No nomographs or manual corrections are required in order to compute the true density of the overlay. Also included are the results of laboratory testing to determine the precision, sensitivity, accuracy, depth of measurement, and temperature dependence, and field testing as compared with a conventional nuclear density gauge. Designed to measure the density of thin asphalt and concrete layers from 2.5 to 10 cm (1 - 4 inches), the Troxler Model 4640-B Thin Layer Density Gauge accurately measures the overlay density without influence from underlying material. This paper presents the design features and measurement principles incorporated in this new gauge for asphalt density measurements. To measure asphalt density, this new gauge uses the backscatter mode, which is a non-destructive method. This gauge contains no radioactive material, so no licensing or special training is required to own or operate this equipment. This gauge has a low-activity gamma-ray source and uses advanced detector technologies and algorithms. Product Group Non Destructive Testing Filter Further PaveTracker Non Nuclear Asphalt Density Gauge The PaveTracker Model 2701-B Plus is an electromagnetic density indication device for asphalt quality control measurements. Recently, a low-activity nuclear gauge specifically designed for asphalt and soil density measurements was exempted from these nuclear regulatory requirements in the United States. These regulatory requirements have become a burden to some users. These gauges use radioactive sources and thus require licensing for ownership and use, gauge operator training, personal dosimetry, and special gauge storage. Gauge measurements are used to establish roller patterns, detect changes in the mix and process adjustments, and control density. Nuclear gauges are used for measuring in-place density during the asphalt compaction process.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |