Large-scale pressure-swelling tests on panels made of strain-hardening cement-based composites with different bedding

Research output: Contribution to book/conference proceedings/anthology/reportChapter in book/anthology/reportContributedpeer-review

Contributors

Abstract

Strain-Hardening Cement-Based Composites (SHCC) are a material class of short-fiber-reinforced concretes which has a strain-hardening behavior due to micromechanical adaptation of the concrete matrix to the short fibers under tensile stress after occurrence of the initial concrete failure. Since its first scientific description in the early 90s, this material has been a constant topic in the research area. In the meantime, extensive knowledge of mechanical properties, cyclic properties, fiber-matrix interactions, modeling and durability aspects is available. Nevertheless, the number of implemented practical application is relatively small, which is justified on one hand to the barriers from standardization and approval procedures and on the other hand by missing knowledge on the transferability of the results from the laboratory scale on test specimens in the scale 1:1. In addition to possible applications in building construction, the material seems to have the potential in road construction. It could combine the advantages of the two proven construction methods, asphalt and concrete construction, with the exclusion of some disadvantages, like joints, rods and others. In particular, a joint less and robust concrete construction could be realized by SHCC. This article presents results from the central loaded square panel tests with different bedding materials. The size of the panel was 2.5 m by 2.5 m and was loaded with up to 4 million cycles. The height of the loading was started on the single wheel load according to German road-building standards and during the experiment increased to 4 times. The relevant deformation and internal strains were measured and evaluated. After the loading the crack patterns were analyzed and specific cracks were investigated in detail, i.e. small samples from a specific crack were gathered out of the main block and the crack surface were analyzed in the electron microscope. The found failure mechanism were compared with cyclic tests on lab scale specimens to create a missing link between the two scales.

Details

Original languageEnglish
Title of host publicationRILEM Bookseries
PublisherSpringer Science and Business Media B.V.
Pages749-760
Number of pages12
Publication statusPublished - 2022
Peer-reviewedYes

Publication series

SeriesRILEM Bookseries
Volume36
ISSN2211-0844

Keywords

Research priority areas of TU Dresden

DFG Classification of Subject Areas according to Review Boards

Subject groups, research areas, subject areas according to Destatis

Keywords

  • Cyclic loading, Large scale testing, SHCC, Strain hardening