MATEC Web of Conferences
Volume 6, 2013Concrete Spalling due to Fire Exposure: Proceedings of the 3rd International Workshop
|Number of page(s)||7|
|Section||Measures to Reduce or Prevent Spalling|
|Published online||17 September 2013|
Microstructural response of polypropylene fibres at high temperature to protect concrete from spalling
Institute of Construction Science Eduardo Torroja, (IETcc-CSIC), Madrid, Spain
The microstructural analysis of the interfacial transition zone (ITZ) and the interaction of polypropylene fibres (PPF) with mortar in the temperature region 170 to 300 °C have been considered. The results confirm a mixed mechanism: The presence of the PPF alters the ITZ and favours an initial cracking formation. After melting, PPF diffuses in the surrounding cement paste closing micropores while, simultaneously, macro pores are increased as consequence of the free space leaved and the growing of microcracks.
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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