Print Email Facebook Twitter Relating the structural strength of concrete sewer pipes and material properties retrieved from core samples Title Relating the structural strength of concrete sewer pipes and material properties retrieved from core samples Author Stanic, N. (TU Delft Sanitary Engineering) Langeveld, J.G. (TU Delft Sanitary Engineering; Partners4UrbanWater) Salet, Theo (Eindhoven University of Technology) Clemens, F.H.L.R. (TU Delft Sanitary Engineering; Deltares) Date 2016 Abstract Drill core samples are taken in practice for an analysis of the material characteristics of concrete pipes in order to improve the quality of the decision-making on rehabilitation actions. Earlier research has demonstrated that core sampling is associated with a significant uncertainty. In this paper, the results of core samples are compared with the results of full-scale pipe cracking lab experiments. It is shown that the concrete of deteriorated sewer pipes shows a significant variability in material characteristics. Further it is shown that the formation of ettringite due to biochemical sulphuric corrosion is not necessarily limited to the crown of the pipe and also degradation of pipe material, measured by the carbonation depth, is occurring at the inside and outside of the pipe. It is concluded that tensile splitting strength and the carbonation depth are the two material property parameters of core sampling with a sufficiently high correlation (R2 > .90) with the structural strength of the pipe. The thickness of the remaining ‘healthy’ concrete material is the optimal parameter, as this requires the smallest sampling size. Subject Collapseconcrete pipescorrosiondegradationsewers and drainsstructural strength To reference this document use: http://resolver.tudelft.nl/uuid:4bc3f6f6-4bac-40e1-b374-231421e1dcad DOI https://doi.org/10.1080/15732479.2016.1187631 ISSN 1573-2479 Source Structure & Infrastructure Engineering, 13 (5), 637-651 Part of collection Institutional Repository Document type journal article Rights © 2016 N. Stanic, J.G. Langeveld, Theo Salet, F.H.L.R. Clemens Files PDF 15732479.2016.1187631.pdf 2.33 MB Close viewer /islandora/object/uuid:4bc3f6f6-4bac-40e1-b374-231421e1dcad/datastream/OBJ/view