Influence of Basalt FRP Mesh Reinforcement on High-Performance Concrete Thin Plates at High Temperatures
Publication: Journal of Composites for Construction
Volume 20, Issue 1
Abstract
A basalt fiber–reinforced polymer (BFRP) mesh was introduced as reinforcement in high-performance concrete (HPC) thin plates (20–30 mm) for implementation in precast sandwich panels. An experimental program studied the BFRP mesh influence on HPC exposed to high temperature. A set of standard furnace tests compared performances of HPC with and without BFRP mesh, assessing material behavior; another set including polypropylene (PP) fibers to avoid spalling compared the performance of BFRP mesh reinforcement to that of regular steel reinforcement, assessing mechanical properties. Stereomicroscope observations before and after fire testing focused on the interface between HPC and BFRP mesh and its change with temperature exposure. BFRP mesh showed tendency to reduce the probability of HPC spalling without solving this issue. BFRP mesh alone leads to mechanical failure of concrete elements, requiring the use of steel. Microscope observations highlighted degradation of the HPC-BFRP mesh interface with temperature due to the melting polymer matrix of the mesh. These observations call for caution when using fiber-reinforced polymer (FRP) reinforcement in elements exposed to fire hazard.
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Journal of Composites for Construction
Volume 20 • Issue 1 • February 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Jul 9, 2014
Accepted: Nov 10, 2014
Published online: Jun 30, 2015
Discussion open until: Nov 30, 2015
Published in print: Feb 1, 2016
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