Suitability of different tests for characterization of the dimpled concrete‐to‐concrete interface

The main aim of this study was to assess the suitability of different existing test setups for the mechanical characterization of a dimpled interface obtained by casting concrete against dimpled high‐density polyethylene (HDPE) membrane. Even though this type of interface roughening is widely used,...

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Bibliographic Details
Published in:	Structural concrete : journal of the FIB Vol. 22; no. 2; pp. 757 - 774
Main Authors:	Čairović, Đorđe, Fuente, Albert, Zlámal, Martin, Venclovský, Jakub, Girgle, František, Januš, Ondřej, Štěpánek, Petr
Format:	Journal Article
Language:	English
Published:	Weinheim WILEY‐VCH Verlag GmbH & Co. KGaA 01-04-2021 Wiley Subscription Services, Inc
Subjects:	concrete‐to‐concrete interface dimpled interface Dimpling Failure modes High density polyethylenes interface shear strength interface tensile strength Interfaces Mechanical properties Membranes precast structures Roughening Shear strength Shear tests test setups
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Summary:	The main aim of this study was to assess the suitability of different existing test setups for the mechanical characterization of a dimpled interface obtained by casting concrete against dimpled high‐density polyethylene (HDPE) membrane. Even though this type of interface roughening is widely used, especially for monolithic connections between precast elements, to the best of the authors' knowledge there is no research providing any data regarding its roughness parameters, tension, and shear strength, nor its failure modes. To this end, a two‐fold objective was established for this research: (a) to identify and analyze, from a technical standpoint, the available test configurations for characterizing the mechanical performance of interfaces, and (b) to perform an extensive experimental program devoted to characterizing the mechanical performance of a dimpled HDPE membrane—cast concrete interface. The suitability of each test for reproducing the expected stress state and the actual resistance mechanism was analyzed. Moreover, a comparison between tension and shear tests, including its main advantages and disadvantaged are also presented.
Bibliography:	Funding information Ministerstvo Průmyslu a Obchodu, Grant/Award Number: FV20595 ‐ “Steel‐concrete composit; Technology Agency of the Czech Republic, Grant/Award Numbers: TH0402043 ‐ “Extension of the appl, FV20595; Ministry of Industry and Trade of the Czech Republic Discussion on this paper must be submitted within two months of the print publication. The discussion will then be published in print, along with the authors’ closure, if any, approximately nine months after the print publication.
ISSN:	1464-4177 1751-7648
DOI:	10.1002/suco.201900513