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IASS-SLTE Symposium 2014: Shells, Membranes and Spatial Structures: Footprints


IASS Symposium 2014

SESSION: Concrete Shell Roofs

Experimental study on textile reinforced cement composites as alternative reinforcement for concrete shells

< Table of Contents for Concrete Shell Roofs
  • Proceedings Name: IASS-SLTE Symposium 2014: Shells, Membranes and Spatial Structures: Footprints
  • ISSN: (Electronic Version) 2518-6582
  • Session: Concrete Shell Roofs
  • Title: Experimental study on textile reinforced cement composites as alternative reinforcement for concrete shells
  • Author(s): Evy VERWIMP, Tine TYSMANS, Marijke MOLLAERT, Svetlana VERBRUGGEN, Joran CORMOND
  • Keywords: Experimental study, textile reinforcedcement composites
Abstract
Current formwork systems and tensile reinforcement for concrete shells are complex, time consuming and/or material wasting. To this end, we propose a new method using textile reinforced cement (TRC) composites, i.e. textiles impregnated with cement. While this cement is still wet, the composite is flexible to be formed in curved formwork elements, which can - after hardening of the cement - carry the concrete casting load. After casting and hardening of the concrete, the formwork elements can stay in place and contribute to the tensile reinforcement of the shell. This paper examines this last phase by an experimental analysis of the mixed TRC-concrete section. First, a series of small beams with a mixed TRC-concrete section is subjected to a four point bending test. Second, a spherical dome (2 m span) is subjected to a point load. The results are promising as the TRC layer takes up tensile forces and a sudden brittle fracture is prevented by a more ductile character of the mixed section. However, for the dome, debonding of TRC and concrete occurred quite early during testing, so future work will be performed on the improvement of this bond, such that the reinforcement capacity of the TRC can fully be exploited.

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