Print Email Facebook Twitter Damage evolution in different types of concrete by means of splitting tests Title Damage evolution in different types of concrete by means of splitting tests Author Vervuurt, A. Van Mier, J.G.M. Chiaia, B. Faculty Civil Engineering and Geosciences Department Stevin Laboratory Date 1995-01-01 Abstract A new splitting test has been used for evaluating damage in different types of concrete. The set up was developed at the Stevin Laboratory of Delft University of Technology and comprises a completely new loading device in which a perfectly horizontal splitting load can be applied to concrete specimens. In addition to classical mechanical measurements, a high resolution optical microscope has been adopted for crack detection at the surface of the thin specimens. Microscale information was obtained on the topological characteristics of the damage patterns. Fractal dimensions were computed. In total, three cement paste mixtures, four mortars and four different types of concrete will be discussed in this paper. The concretes contained either river gravel with different maximum aggregate size (2 and 16 mm), phosphorous-slag aggregates or Lytag lightweight aggregates. To obtain a better understanding of the failure mechanisms at the interface between matrix and composite, tests were performed where a single (cylindrical) aggregate was embedded in a matrix of cement paste or mortar. It will be shown that the concrete mixture with phosphorous-slag aggregates yields the highest peak load and the most brittle post-peak behavior whereas the concrete with large river gravel aggregates shows the most ductile load-displacement response. Furthermore the interfacial strength is affected substantially by the density of the aggregates. This provides a different failure mechanism for the lightweight concrete as indicated by the microscopic observations. The fractal analysis of the different damage patterns confirmed different behaviors, strictly related to peculiar microscopic mechanisms. To reference this document use: http://resolver.tudelft.nl/uuid:23894df5-f247-4ebb-831c-c7eee2515de3 Publisher Delft University of Technology ISSN 0046-7316 Source HERON, 40 (4), 1995 Part of collection Institutional Repository Document type journal article Rights (c) 1995 The Authors Files PDF VanMier2_1995.pdf 3.14 MB Close viewer /islandora/object/uuid:23894df5-f247-4ebb-831c-c7eee2515de3/datastream/OBJ/view