Particles - Abrasion evolution of steel furnace slag aggregate for railway ballast: 3D morphology analysis of scanned particles by close-range photogrammetry

This Dataset contains supplementary data related to the scientific article "Abrasion evolution of steel furnace slag aggregate for railway ballast: 3D morphology analysis of scanned particles by close-range photogrammetry", by André Paixão and Eduardo Fortunato, published in Construction and Building Materials, Elsevier B.V., ISSN: 0950-0618 (accepted for publication on 4 October 2020).

https://doi.org/10.1016/j.conbuildmat.2020.121225

The dataset comprises 180 digital 3D models in .ply format, corresponding to 30 distinct reconstructed railway ballast particles from two different materials - slag (a) and granite (g) - captures at three stages of the micro-Deval abrasion test:
i) before the test;
ii) after 2000 revolutions;
iii) after a total of 14,000 revolutions (end of the test).

The file naming convention for each particle is as follows, using the example of slag particle no. 15:
a15.ply - model before the microDeval test;
a15_.ply - model after 2000 revolutons;
a15__.ply - model after 14,000 revolutions.

The initial particles were carefully positioned and oriented such that their centre of mass is located at coordinates (x,y,z) = (0,0,0), and aligned with the respective principal axis (not with L, I and S distances).
The subsequent degraded models of each particle were aligned with the initial particle model using MeshLab's auto align tool (meshlab.net).

For additional data, please contact the authors.

Acknowledgments
The first author’s postdoctoral fellowship [SFRH/BPD/107737/2015] was supported by Fundação para a Ciência e a Tecnologia, through POCH, co-financed by the ESF and national funds of MCTES, Portugal. Part of the work was conducted in the framework of the TC202 national committee of the Portuguese Geotechnical Society (SPG) “Transportation Geotechnics”, in association with the International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE-TC202). The valuable help of Mr. Rui Coelho, Mr. João Costa and students Carlos Afonso and Nycolas Glerean with the photographic sessions of the particles and with the micro-Deval testing is also acknowledged. Special thanks to Siderurgia Nacional da Maia for providing the steel slag aggregate used in this research.