3D scans of two types of railway ballast including shape analysis information

This data set contains 3D scanner data of two types of railway ballast “Calcite” (stems from Croatia) and “Kieselkalk”, also known as Helvetic Siliceous Limestone, (stems from Switzerland).
From each type of ballast 25 stones are scanned. The files are provided in .ply format.
For the scanned meshes several shape descriptors are provided: elongation, flatness, sphericity, convexity index.
Additional to the 3D scans, both simplified and rounded versions of the meshes are included.
For these meshes information on three different angularity indices are available.
The scanned ballast types are the same, as  previously investigated in uniaxial compression tests and direct shear tests:
Suhr, Bettina, & Six, Klaus. (2018).
"Compression tests and direct shear test of two types of railway ballast [Data set]"
Zenodo. http://doi.org/10.5281/zenodo.1423742

A detailed shape analysis of the results is conducted in:
Bettina Suhr, William A. Skipper, Roger Lewis, and Klaus Six
"Shape analysis of railway ballast stones: curvature-based calculation of particle angularity"
Scientific Reports, 2020, 10, 6045
DOI: https://doi.org/10.1038/s41598-020-62827-w

A summary of several shape descriptors can be found in:
B. Suhr and K. Six:
"Simple particle shapes for DEM simulations of railway ballast --  influence of shape descriptors on packing behaviour"
Granular Matter, 2020, 22
DOI: https://doi.org/10.1007/s10035-020-1009-0

This data set is organised as follows:
1_ScanMeshesCleaned
    scanned meshes:
    K_1.ply  -  K_25.ply Calcite (German: Kalzit)
    KK_1.ply - KK_25.ply Kieselkalk
2_CSE1  
    simplifications of the scanned meshes, little simplifications, used in the detailed shape analysis
    CSE1_AngInfo.csv: contains values of three different angularity indices used in the detailed shape analysis
3_CSE2  
    simplifications of the scanned meshes, more simplified, used in the detailed shape analysis
    CSE2_AngInfo.csv: contains values of three different angularity indices used in the detailed shape analysis
4_CSE3  
    simplifications of the scanned meshes, even more simplified, used in the detailed shape analysis
    CSE3_AngInfo.csv: contains values of three different angularity indices used in the detailed shape analysis
5_CSE4  
    simplifications of the scanned meshes, most simplified, used in the detailed shape analysis
    CSE4_AngInfo.csv: contains values of three different angularity indices used in the detailed shape analysis
6_RoundedMeshes
    artificially rounded versions of the scanned ballast meshes, used in the detailed shape analysis
    RoundedMeshes_AngInfo.csv: contains values of three different angularity indices used in the detailed shape analysis
7_TestBodies  
    meshes of artificial test bodies, constructed for testing different angularity indices in the detailed shape analysis
    TestBodies_AngInfo.csv: contains values of three different angularity indices used in the detailed shape analysis
scanMeshesInfo.csv: summary of several shape descriptors of the scanned meshes
README.txt  

Check the README.txt file for more information on the technical aspects of scanning.