Effect of grain shape and petrographic composition of railway ballast on the Impact Test

Have a look at Elisabeth Uhlig’s master‘s thesis in the LIBRARY menu! Elisabeth studied Geology at TU Graz and University of Graz. Her thesis is part of the TU Graz ballast attrition test evaluation project and makes extensive use of the Petroscope functionality.

Elisabeth Uhlig investigated the impact of varieties in grain shape (i.e. „form“), angularity and petrographic composition on the result deviation of the dynamic impact value SZ acc. to EN 1097-2. For a precise and efficient analysis of grain shape and angularity, PETROSCOPE 4D was used. The samples were measured or „scanned“ using the Petroscope device, the impact test was carried out after that and afterwards the samples were scanned again in order to determine changes in particle size distribution, shape and angularity. Elisabeth could illustrate that particle angularity does not affect test results, but shape (form) does. The comparison of pre-test and post-test particle size distribution showed that the test results for SZ reflects the true degree of fragmentation.

Posted in Uncategorized