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A method to downscale joint surface roughness and to create replica series using 3D printed molds

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Uotinen, Lauri
dc.contributor.author Korpi, Eero
dc.contributor.author Hartikainen, Ari
dc.contributor.author Yorke, Raphael
dc.contributor.author Antikainen, Juha
dc.contributor.author Johansson, Fredrik
dc.contributor.author Rinne, Mikael
dc.date.accessioned 2017-01-19T10:31:39Z
dc.date.issued 2017
dc.identifier.citation Uotinen , L , Korpi , E , Hartikainen , A , Yorke , R , Antikainen , J , Johansson , F & Rinne , M 2017 , A method to downscale joint surface roughness and to create replica series using 3D printed molds . in ISRM 13th International Congress on Rock Mechanics, Montreal, May 10-13, 2015 . Canadian Institute of Mining, Metallurgy and Petroleum , ISRM International Congress on Rock Mechanics , Montreal , Canada , 10/05/2015 . en
dc.identifier.isbn 978-1-926872-25-4
dc.identifier.other PURE UUID: 0ae7ea6b-f36d-4428-8781-f767b2618b0e
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/0ae7ea6b-f36d-4428-8781-f767b2618b0e
dc.identifier.other PURE LINK: http://www.scopus.com/inward/record.url?scp=85044164305&partnerID=8YFLogxK
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/10375854/770_Uotinen_v5.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/24152
dc.description VK: T20703
dc.description.abstract In order to determine the in-situ shear strength of rock joints, large scale testing is required. However, this is both expensive and difficult to execute. One possible method to overcome this may be to use photogrammetry to capture large joint surface roughness in-situ and downscale it to replica samples, which could be sheared in laboratory. In this paper, as a first part in such a method, a technique to digitize surface roughness and to produce replica samples for laboratory shear testing from a larger joint sample are presented. First, a thin granitic rock slice with dimensions of 1.75 m x 0.95 m of granitic intact rock was chosen for the study. The joint surface is fresh and created through tensile induced splitting. The large joint sample is digitized using photogrammetry. Then, one full-scale 1.7 m x 0.6 m geometry is cropped from the digitized joint geometry and then subsamples at 10x, 7.5x, 5x, 2.5x and 1x scales. All sub-geometries are scaled down digitally to produce 0.17 m by 0.06 m geometries. The geometries are used to make casting molds both positive and negative to produce samples with perfect matedness. The casting molds are 3D printed in polylactic acid plastic and C60/75 concrete is cast to produce a replica series. In addition to the creation of this replica series, two pilot replicas are also tested using a portable shear box with a 0.5 MPa normal pressure. The results from the pilot rounds are presented and discussed. Finally, suggestions for future research are given. en
dc.format.extent 11
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries ISRM 13th International Congress on Rock Mechanics, Montreal, May 10-13, 2015 en
dc.rights openAccess en
dc.title A method to downscale joint surface roughness and to create replica series using 3D printed molds en
dc.type A4 Artikkeli konferenssijulkaisussa fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Civil Engineering
dc.contributor.department KTH Royal Institute of Technology
dc.subject.keyword Joint
dc.subject.keyword Crack
dc.subject.keyword Fracture
dc.subject.keyword Photogrammetry
dc.subject.keyword 3D printing
dc.subject.keyword Replica
dc.subject.keyword Concrete
dc.subject.keyword Shear Box
dc.identifier.urn URN:NBN:fi:aalto-201701191097
dc.type.version acceptedVersion


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