Photogrammetry for digital reconstruction of railway ballast particles – a cost-efficient method

This Dataset contains supplementary data related to the scientific article "Photogrammetry for digital reconstruction of railway ballast particles - a cost-efficient method", by André Paixão, Ricardo Resende and Eduardo Fortunato, Construction and Building Materials, Elsevier B.V., ISSN: 0950-0618 (accepted for publication October 6th, 2018). https://doi.org/10.1016/j.conbuildmat.2018.10.048 The data comprises two .zip files, each containing a set of digital 3D .ply models of 18 reconstructed railway ballast particles. The 3D models in one set were obtained using laser scanning (Creaform EXAscan), the models in the other set were obtained by the photogrammetry approach proposed by the authors in the article. Original captures (.jpg) used for the 3D reconstruction of the ballast particles by the photogrammetry method described in the paper may also be provided. For additional data please contact the authors. Acknowledgments The laser scans and the traditional particle measurements were performed in the scope of a MSc thesis of Patrícia Jerónimo. The authors are grateful to Geotrilho for kindly lending the laser scan equipment and to Eng. Bruno Baeta for performing the scans. The help of Mr. Rui Coelho from LNEC in the photogrammetry tasks is also greatly acknowledged. The first author’s postdoctoral fellowship [SFRH/BPD/107737/2015] was supported by Portuguese Foundation for Science and Technology (FCT), through POCH co-financed by the ESF and national funds of MCTES, Portugal. Part of the work was conducted with the support of ISTAR-IUL (UID/MULTI/4466/2016). This 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).