Description
The VDG 40 videogranulometer is an optoelectonic device aimed at rapidity determining the grading curve and shape of aggreates used for road building and civil engineering purposes. The test method, described in French standard XP P 18-566-2002, is referred to in the French aggregate standard XP P 18-540 as an alternative to the sieving test method.
The performance of the VDG 40 allows to analyze each particle of the test portion with a good precision. Washing and drying of the test portion can ve avoided, which reduces even more the analysis global time.
The new version incorporates three important new features:
Automatic calculation of the VDG regularity envelope, aimed at assessing the conformity of the production to the requirements in place of the sieving method.
Railway ballast angularity assessment routine, giving useful information on the durability of the ballast.
Possibility to transfer the results to sofware editing Fiche Technique de Produit (FTP), using Excel.
The VDG 40 2 software features improved ergonomics and new functions. As the sample is introduced into a feed tank, the constituents are conditioned to fall at a controlled dynamic rate in front of an optical analyzer. A software algorithm processes the images to extract information about each aggregate. The operator is assisted throughout the entire operation.
