Journal article
Influence of Basalt FRP Mesh Reinforcement on High-Performance Concrete Thin Plates at High Temperatures
Department of Civil Engineering, Technical University of Denmark1
Section for Structural Engineering, Department of Civil Engineering, Technical University of Denmark2
DBI - The Danish Institute of Fire and Security Technology3
Section for Building Design, Department of Civil Engineering, Technical University of Denmark4
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.
Language: | English |
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Year: | 2015 |
ISSN: | 19435614 and 10900268 |
Types: | Journal article |
DOI: | 10.1061/(asce)cc.1943-5614.0000546 |
ORCIDs: | Schmidt, Jacob Wittrup and Stang, Henrik |