RT Journal Article T1 3D printing effect on the compressive strength of concrete structures A1 Aramburu, A. A1 Calderon-Uriszar-Aldaca, I. A1 Puente, I. AB The mechanical behaviour of annular 3D-printed cylindrical specimens is studied in this paper and compared to the expected theoretical behaviour of cast-moulded geometries. First, the compressive performance of the material as per standard EN 12390-3 is presented. The theoretical estimation differed from the test results and the reasons have been verified. Two key procedures are proposed by measuring the 3D-printed shapes: a geometrical characterization, in which both the material and the process parameters are considered, and a suitable formulation for defining the effective section of the printed geometries. The aim is to establish corrections for structural calculations, considering the material and the 3D printing process on the basis of the proposed guidelines and the test specimens. SN 0950-0618 YR 2022 FD 2022-11-07 LA eng NO Aramburu , A , Calderon-Uriszar-Aldaca , I & Puente , I 2022 , ' 3D printing effect on the compressive strength of concrete structures ' , Construction and Building Materials , vol. 354 , 129108 . https://doi.org/10.1016/j.conbuildmat.2022.129108 NO Publisher Copyright: © 2022 Elsevier Ltd NO Financial support is also gratefully acknowledged, both from the SPRI research programme funded by the Basque Government under project ERRAIL ZL-2020/00940 and ZL-2021/00181 and from Elkartek NEOMAT project KK-2021/00059 . The authors wish to thank the assistance received from the staff of the 3D-printing laboratory of Tecnalia, (especially A. Salvador, R. Castaño and J. Roncero), the students (especially, O. García and M. Kawka) and the laboratory technician (A. López) from Tecnun – University of Navarra for documenting and assisting with the tests and measurements at the university laboratory and the technical manager of Gallardo Engineering (A. Herrero) for the ideas that helped to focus this research. Financial support is also gratefully acknowledged, both from the SPRI research programme funded by the Basque Government under project ERRAIL ZL-2020/00940 and ZL-2021/00181 and from Elkartek NEOMAT project KK-2021/00059. DS TECNALIA Publications RD 29 sept 2024